4.7 Article

Sustainable and efficient technologies for removal and recovery of toxic and valuable metals from wastewater: Recent progress, challenges, and future

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Forward osmosis membrane technology for nutrient removal/recovery from wastewater: Recent advances, proposed designs, and future directions

Shahryar Jafarinejad

Summary: This review summarizes the state of forward osmosis (FO) technology for nutrient removal/recovery from wastewater and sludge, aiming to identify areas for future improvements. Further research is needed on the properties of FO, wastewater pretreatment, membrane cleaning strategies, and other factors to promote the full-scale application of FO technology in the future.

CHEMOSPHERE (2021)

Review Environmental Sciences

Alternative, environmentally conscious approaches for removing antibiotics from wastewater treatment systems

Jennifer N. Russell et al.

Summary: The prevalence of antibiotic resistance in the environment is a critical public health concern, particularly in wastewater treatment environments. Many currently proposed methods for removing antibiotics from wastewater are unsafe for environmental use, leading researchers to seek alternative environmentally safe methods to mitigate environmental antibiotic resistance selection.

CHEMOSPHERE (2021)

Article Environmental Sciences

An efficient separation for metal-ions from wastewater by ion precipitate flotation: Probing formation and growth evolution of metal-reagent flocs

Hongyang Wu et al.

Summary: The addition of Fe3+ and CTAB reagents into flotation solution contributes to the formation of MHA-Fe-CTAB flocs, which are easy to recover and have high flotation removal efficiency.

CHEMOSPHERE (2021)

Article Environmental Sciences

Insight into the effect of oxidation degree of graphene oxides on their removal from wastewater via froth flotation

Luping Chang et al.

Summary: The oxidation degree of graphene oxides (GO) affects their removal from wastewater via froth flotation. The addition of CTAB can improve the surface hydrophobicity of GO, making it easier to separate by froth flotation. The removal of GO is dependent on CTAB dosage, pH, and stirring time, and the removal mechanism is proven to be electrostatic attraction.

CHEMOSPHERE (2021)

Article Environmental Sciences

Multiple heavy metals immobilization based on microbially induced carbonate precipitation by ureolytic bacteria and the precipitation patterns exploration

Suyu Qiao et al.

Summary: The study showed that the MICP process could effectively remove common heavy metals in mining areas, such as copper, zinc, nickel, and cadmium.

CHEMOSPHERE (2021)

Article Chemistry, Physical

Efficient extraction of Rb+ and Cs+ by a precipitation flotation process with ammonium phosphowolframate as precipitant

Dezhen Fang et al.

Summary: The research investigates the precipitation flotation process for Rb+ and Cs+ extraction using ammonium phosphowolframate and cetyltrimethylammonium bromide, achieving an extraction efficiency of almost 100% under optimized conditions. DFT calculations and IGM reveal non-covalent interactions involved in the extraction process, while analysis of the flotation mechanism shows electrostatic attraction as the main force. This method shows great potential for Rb+ and Cs+ separation in salt lake brine treatment.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2021)

Review Chemistry, Inorganic & Nuclear

Metal organic framework (MOF)-based micro/nanoscaled materials for heavy metal ions removal: The cutting-edge study on designs, synthesis, and applications

Guo-Rong Xu et al.

Summary: The rapid industrial and agricultural expansion has led to severe heavy metal ion pollution, prompting the urgent need for removal. Advanced materials, such as metal-organic frameworks (MOFs), are being synthesized to overcome challenges in water purification. MOFs show great potential in adsorption due to their highly porous structure and large surface area.

COORDINATION CHEMISTRY REVIEWS (2021)

Article Environmental Sciences

Growth responses, accumulation, translocation and distribution of vanadium in tobacco and its potential in phytoremediation

Zhen-zhong Wu et al.

Summary: The experiment investigated the tolerance of tobacco seedlings to vanadium by exposing them to varying concentrations of vanadium in nutrient solution. The results showed that high vanadium levels had a significant impact on plant growth, but the plant was able to cope with oxidative stress through activating protective mechanisms. Vanadium accumulated in plant tissues, with the majority being retained in the roots, indicating the potential of tobacco as a phytostabilizer for vanadium-contaminated environments.

ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY (2021)

Article Chemistry, Applied

Highly selective removal and recovery of Ni(II) from aqueous solution using magnetic ion-imprinted chitosan nanoparticles

Yuan Chen et al.

Summary: The nano-sized magnetic ion-imprinted polymers (MIIPs) synthesized using chitosan showed high sorption selectivity for Ni(II) and could efficiently recover the adsorbed ions. The sorption process was quick, endothermic, and could be described by Langmuir isotherm model and pseudo-second-order kinetic model. MIIPs proved to be a suitable adsorbent for selective removal and recovery of low-concentration Ni(II) ions from wastewaters.

CARBOHYDRATE POLYMERS (2021)

Article Environmental Sciences

Chronic toxicity of waterborne thallium to Daphnia magna

Andrew H. Nagel et al.

Summary: Limited chronic toxicity data exists regarding the trace element thallium's impact on aquatic biota, hindering the establishment of water quality criteria for this metal. Daphnia magna showed lower sensitivity to thallium under controlled laboratory conditions compared to the current Canadian regulatory guideline value.

ENVIRONMENTAL POLLUTION (2021)

Review Engineering, Environmental

Differentiating Solutes with Precise Nanofiltration for Next Generation Environmental Separations: A Review

Yangying Zhao et al.

Summary: Selective removal or enrichment of target solutes from complex aqueous matrices is critical for water purification and resource recovery, and membrane separation technology plays a key role in addressing environmental challenges. By tuning membrane structure and chemistry, novel membrane materials with improved selectivity can be developed.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2021)

Article Energy & Fuels

Intensification reactive recovery of tetravalent platinum from spent catalyst via synergism of TBP/Cyanex 302 system

Raja Norimie Raja Sulaiman et al.

Summary: Synergistic reactive extraction of platinum (IV) was conducted using TBP and Cyanex 302, with the highest extraction efficiency achieved when using a mixture of 0.05 M Cyanex 302 + 0.05 M TBP. Through the synergism system, the concentration of extractants can be reduced by 50% while maintaining a productive extraction process. Additionally, platinum (IV) can be successfully recovered using thiourea in hydrochloric acid.

CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION (2021)

Article Engineering, Environmental

Iron-zirconium microwave-assisted modification of small-pore zeolite W and its alginate composites for enhanced aqueous removal of As(V) ions: Experimental and theoretical studies

Youness Abdellaoui et al.

Summary: This study focuses on the rapid and efficient modification of fly ash-based zeolite W using microwave-assisted process for effective removal of arsenate from water. The FeZrZW adsorbent demonstrated high efficiency and adsorption capacity for As(V) ions, surpassing natural or fly ash-based zeolites and some commercial adsorbents. The simulation results confirmed the strong and spontaneous adsorption onto FeZrZW, which shows promising potential for full-scale arsenic recovery processes.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Environmental Sciences

Removal and recovery of heavy metals from sewage sludge via three-stage integrated process

Hatice Yesil et al.

Summary: This study found that a combination of ultrasonication pretreatment and alkaline fermentation can achieve high hydrolysis rate, metal leaching rate, and reduced bioavailability of potentially toxic heavy metals in sewage sludge. The supported liquid membrane recovery method can effectively recover metals from bioleaching effluent.

CHEMOSPHERE (2021)

Article Environmental Sciences

Effective water/wastewater treatment methodologies for toxic pollutants removal: Processes and applications towards sustainable development

A. Saravanan et al.

Summary: Effluent from anthropogenic activities has led to a notable impact on the environment, particularly on water quality. Various pollutants in water can be removed using physical, chemical, and biological methods, with membrane separation and adsorption techniques being more effective. Recent research has focused on the development of wastewater treatment technologies, with a recognition of the challenges in enhancing treatment methodologies for commercial application.

CHEMOSPHERE (2021)

Article Biochemistry & Molecular Biology

Polydopamine-assisted grafting of chitosan on porous poly (L-lactic acid) electrospun membranes for adsorption of heavy metal ions

Qasim Zia et al.

Summary: A versatile method for manufacturing chitosan-grafted porous P-PLLA nanofibrous membranes using PDA as an intermediate layer was developed in this study. The membranes showed high adsorption capability for removing Cu2+ ions from wastewater, with a maximum adsorption capacity of 270.27 mg/g fitting well with the Langmuir isotherm.

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES (2021)

Article Green & Sustainable Science & Technology

Enhanced recovery of hexavalent chromium by remodeling extracellular polymeric substances through engineering Agrobacterium tumefaciens F2

Shanshan Pi et al.

Summary: The bioengineering method enhanced chromium recovery by increasing polysaccharide content in EPSs, which played a crucial role in chelating with Cr(VI) and reducing it to Cr(III). This approach offers a simple, effective, and sustainable way to preserve chromium resources.

JOURNAL OF CLEANER PRODUCTION (2021)

Review Environmental Sciences

Phyco-remediation of swine wastewater as a sustainable model based on circular economy

Itzel Y. Lopez-Pacheco et al.

Summary: The expansion of pork production has led to a significant increase in waste generation, particularly wastewater. While there has been some increase in wastewater treatment, there is still a lack of useful technologies for treating wastewater from the pork industry. The use of phycoremediation with microalgae appears to be a feasible and sustainable option for removing compounds from swine wastewater.

JOURNAL OF ENVIRONMENTAL MANAGEMENT (2021)

Review Environmental Sciences

Recent advances in heavy metal recovery from wastewater by biogenic sulfide precipitation

Manoj Kumar et al.

Summary: Biological sulfide precipitation by sulfate reducing bacteria is an emerging technique for the recovery of heavy metals from metal contaminated wastewater, offering advantages such as low capital cost, ability to form highly insoluble salts, and capability to remove and recover heavy metals even at very low concentrations. The recovered metal sulfide nanoparticles can be applied in various fields, serving as an incentive for industries.

JOURNAL OF ENVIRONMENTAL MANAGEMENT (2021)

Article Engineering, Environmental

Immobilization of cadmium by Burkholderia sp. QY14 through modified microbially induced phosphate precipitation

Guoquan Zeng et al.

Summary: The addition of 10 mM Ca2+ during the Microbially induced phosphate precipitation (MIPP) process significantly increased the removal ratio of Cd, potentially through the formation of a solid solution to remove the heavy metal cadmium.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Engineering, Environmental

Potential of the magnetic hollow sphere nanocomposite (graphene oxide-gadolinium oxide) for arsenic removal from real field water and antimicrobial applications

Lakshmi Prasanna Lingamdinne et al.

Summary: The study shows that the magnetic hollow-sphere nanocomposite graphene oxide-gadolinium oxide has potential for arsenic removal and antimicrobial activity. It has a high adsorption capacity and stability, reducing arsenic concentrations in water to safe levels.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Engineering, Environmental

Nickel complexation as an innovative approach for nickel-cobalt selective recovery using sulfate-reducing bacteria

Yun Liu et al.

Summary: This study demonstrated the different solubility of nickel and cobalt in the presence of sulfate reducing bacteria, with nickel remaining soluble while cobalt often precipitated as sulfide. Proteins identified in the experiments were found to play various roles in maintaining nickel homeostasis, functioning as metalloenzymes, and containing nickel-binding ligands. Specific species like Desulfomicrobium baculatum, Stenotrophomonas maltophilia, and Desulfovibrio magneticus were responsible for producing these proteins.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Review Engineering, Environmental

A critical review on the electrospun nanofibrous membranes for the adsorption of heavy metals in water treatment

Fan Zhu et al.

Summary: ENFMs, as excellent adsorbents, have high adsorption capacity for heavy metals, with more focus needed on improving stability and mechanical strength for practical applications.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Environmental Sciences

Exploring the Cr(VI) removal mechanism of Sporosarcina saromensis M52 from a genomic perspective

Jiayao Li et al.

Summary: This study demonstrated that the bacterium strain M52 with strong Cr(VI) removal ability primarily removes Cr(VI) through bio-reduction, rather than bio-adsorption. Characterization analyses and genome analyses revealed the potential mechanisms of bio-reduction, providing a theoretical basis for Cr(VI) bioremediation.

ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY (2021)

Article Environmental Sciences

Effect and mechanisms of synthesis conditions on the cadmium adsorption capacity of modified fly ash

Xin Zhao et al.

Summary: The study prepared modified coal fly ash (NMFA) through sodium hydroxide treatment using a low-temperature hydrothermal method. The optimal conditions for Cd2+ adsorption by NMFA were found to be ash to base ratio of 5:5, calcination temperature of 200 degrees C, and calcination time of 3 h. Characterization results confirmed the crucial role of functional groups such as Si-O, Al-O, and Fe-O in Cd2+ removal.

ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY (2021)

Article Environmental Sciences

Phylogenetically divergent bacteria consortium from neutral activated sludge showed heightened potential on bioleaching spent lithium-ion batteries

Xunchao Cai et al.

Summary: Novel bioleaching bacteria with shorter leaching cycle and higher tolerance to organics have been enriched from non-acidic environments, showing high potential for metal recovery from spent LIBs or other organic-rich environments.

ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY (2021)

Article Metallurgy & Metallurgical Engineering

Recovery of gallium from leach solutions of zinc refinery residues by stepwise solvent extraction with N235 and Cyanex 272

Kuifang Zhang et al.

Summary: A novel method was proposed for the extraction of gallium from high-ferric and strongly acidic sulfate leach solutions, achieving efficient separation of metals through multiple stepwise processes. The method demonstrated high selectivity for iron removal and gallium extraction, leading to a concentrated gallium solution with a concentration of 1502 mg/L.

HYDROMETALLURGY (2021)

Article Polymer Science

Industrially scalable Chitosan/Nylon-6 (CS/N) nanofiber-based reusable adsorbent for efficient removal of heavy metal from water

Ashish Kakoria et al.

Summary: The study achieved the industrially scalable fabrication of a Chitosan/Nylon-6 based nanofiber membrane for efficient adsorption of heavy metal contaminants in water, demonstrating its potential in practical applications and the ability for multiple reuses.

POLYMER (2021)

Article Green & Sustainable Science & Technology

Energy saving anammox technology-based nitrogen removal and bioenergy recovery from wastewater: Inhibition mechanisms, state-of-the-art control strategies, and prospects

Amarpreet Singh Arora et al.

Summary: The anammox technology is highly regarded for its low sludge production and energy efficiency, but faces challenges in dealing with inhibiting factors in waste streams. Detailed control and mitigation of these factors are crucial for successful implementation of the technology. Developing and implementing control strategies are key to addressing inhibiting factors and ensuring optimal performance.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2021)

Article Multidisciplinary Sciences

Nanoscale control of internal inhomogeneity enhances water transport in desalination membranes

Tyler E. Culp et al.

Summary: Biological membranes achieve high permeabilities and ideal selectivities through well-defined nanoscale structures of membrane proteins. Polyamide desalination membranes can maximize water permeability without sacrificing salt selectivity by systematically controlling nanoscale polyamide inhomogeneity.

SCIENCE (2021)

Article Environmental Sciences

Removal of cadmium from wastewater by magnetic zeolite synthesized from natural, low-grade molybdenum

Zhen-dong Peng et al.

Summary: In this study, magnetic zeolite was synthesized for cadmium adsorption by adding nano ferroferric oxide, which enhanced the magnetic property of zeolite. The saturation magnetization and adsorption capacity of magnetic zeolite were influenced by the amount of nano ferroferric oxide added and pH value.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Engineering, Chemical

Highly effective removal of lead and cadmium ions from wastewater by bifunctional magnetic mesoporous silica

Shuangli Li et al.

Summary: The bifunctionalized magnetic mesoporous silica material, NZVI-SH-HMS, successfully synthesized with thiol and nanometer zero-valent iron was effective in removing lead and cadmium ions from aqueous solution. The material demonstrated good porous properties, high adsorption capacity, and excellent adsorption performance in different simulated wastewater, indicating promising capabilities for heavy metal ion removal in actual water environments.

SEPARATION AND PURIFICATION TECHNOLOGY (2021)

Review Chemistry, Analytical

Deep eutectic solvents. The new generation of green solvents in analytical chemistry

Alvaro Santana-Mayor et al.

Summary: The development of sustainable chemistry has led to the emergence of new materials, with deep eutectic solvents (DESs) as a promising non-toxic alternative to toxic organic solvents, seeing a significant increase in their applications in analytical chemistry in recent years. The vast amount of information generated from studies associated with DESs needs continuous revision.

TRAC-TRENDS IN ANALYTICAL CHEMISTRY (2021)

Article Biotechnology & Applied Microbiology

Microbially-induced calcium carbonate precipitation by a halophilic ureolytic bacterium and its potential for remediation of heavy metal-contaminated saline environments

Hui Bai et al.

Summary: This study described a novel halophilic ureolytic bacterium (Exiguobacterium sp. JBHLT-3) capable of efficiently removing lead contamination from saline solutions by forming calcium carbonates. Even under high salinity conditions, this bacterium maintained a high removal efficiency.

INTERNATIONAL BIODETERIORATION & BIODEGRADATION (2021)

Article Multidisciplinary Sciences

Ionic liquid enables highly efficient low temperature desalination by directional solvent extraction

Jiaji Guo et al.

Summary: Seawater desalination is critical in addressing the global water scarcity challenge. A new non-membrane desalination technology called Directional Solvent Extraction (DSE) can utilize low temperature waste heat and achieve higher desalination rates by using ionic liquids as directional solvents. This research demonstrates the potential for significantly advancing DSE technology as a solution to the challenges in the global water-energy nexus.

NATURE COMMUNICATIONS (2021)

Article Chemistry, Physical

Self-Supported Reduced Graphene Oxide Membrane and Its Cu2+ Adsorption Capability

Yangjinghua Yu et al.

Summary: Graphene stratiform membrane materials have been utilized for heavy metal removal in aqueous systems due to their unique properties. In this study, reduced graphene oxide (rGO) membrane was used to adsorb Cu2+ ions from wastewater, showing a maximum adsorption capacity of 149.25 mg/g. The adsorption process followed a pseudo-second-order kinetic model, and the adsorption isotherms were well represented by the Freundlich model.

MATERIALS (2021)

Article Multidisciplinary Sciences

Cellulose acetate based Complexation-NF membranes for the removal of Pb(II) from waste water

H. Idress et al.

Summary: This study investigated the removal of Pb(II) using polymer matrix membranes, with the addition of Gum Arabic significantly improving membrane performance. The Gum Arabic modified membranes showed enhanced permeability, hydrophilicity, and anti-fouling properties, opening up new possibilities in membrane technology.

SCIENTIFIC REPORTS (2021)

Article Multidisciplinary Sciences

Adsorption of Cr(VI), Ni(II), Fe(II) and Cd(II) ions by KIAgNPs decorated MWCNTs in a batch and fixed bed process

Titus Chinedu Egbosiuba et al.

Summary: Efficient removal of toxic metal ions from chemical industry wastewater is achieved using KIAgNPs decorated MWCNTs nano adsorbent, showing excellent performance in both batch and fixed bed systems. The study demonstrated successful deposition of KIAgNPs on the surface of MWCNTs for enhanced adsorption of Cr(VI), Ni(II), Fe(II), Cd(II) ions and physico-chemical parameters removal from wastewater.

SCIENTIFIC REPORTS (2021)

Article Green & Sustainable Science & Technology

Milliampere-level direct current enhance cyanogenic capability of bacteria during the bioleaching of precious metals from waste printed circuit boards

Mi Lin et al.

Summary: A novel bioleaching technology assisted by milliampere-level direct current was developed in this study to enhance cyanide production from waste printed circuit boards. Results showed that 10 mA current was the most beneficial for cyanide production, leading to a reduction in energy consumption and changes in bacterial abundance and functional classification.

JOURNAL OF CLEANER PRODUCTION (2021)

Article Green & Sustainable Science & Technology

Removal of copper ions from wastewater via adsorption on modified hematite (α-Fe2O3) iron oxide coated sand

Junaid Khan et al.

Summary: This study improved the surface quality of synthetic hematite iron oxide coated sand and evaluated its adsorption and desorption capabilities for copper ions. It was found that the coating at a lower pH resulted in higher copper ion removal efficiency, reaching 94%. Acidic solutions were identified as effective desorption media for copper ions on the surface of hematite iron oxide coated sand.

JOURNAL OF CLEANER PRODUCTION (2021)

Article Environmental Sciences

Preparation and characterization of magnetic modified bone charcoal for removing Cu2+ ions from industrial and mining wastewater

Chenxi Niu et al.

Summary: This study addressed the urgent global problem of heavy metal water pollution by developing a high efficiency adsorbent using modified chicken bone charcoal and magnetic nanoparticles. The adsorbent showed a high removal rate of 99.98% and adsorption capacity of 15.057 mg/g for Cu2+ under optimal conditions. The adsorption process followed the Langmuir isotherm and pseudo-second-order kinetic model.

JOURNAL OF ENVIRONMENTAL MANAGEMENT (2021)

Article Environmental Sciences

Uranium removal from complex mining waters by alginate beads doped with cells of Stenotrophomonas sp. Br8: Novel perspectives for metal bioremediation

Ivan Sanchez-Castro et al.

Summary: The study optimized the immobilization of Br8 bacterial biomass in an inorganic matrix to provide protection to the cells and make the process more convenient for real-scale utilization. The use of biocompatible alginate beads for Br8 cells immobilization showed promising results in U bioremediation.

JOURNAL OF ENVIRONMENTAL MANAGEMENT (2021)

Article Environmental Sciences

Sustainable approach on removal of toxic metals from electroplating industrial wastewater using dissolved air flotation

G. Pooja et al.

Summary: This research successfully removed heavy metals from wastewater produced by an electroplating industry using the Dissolved Air Flotation (DAF) treatment process. Under optimized conditions, about 97.39% of metal ions were removed, demonstrating the potential of the DAF process in wastewater treatment.

JOURNAL OF ENVIRONMENTAL MANAGEMENT (2021)

Article Engineering, Chemical

Plant-Based Tacca leontopetaloides Biopolymer Flocculant (TBPF) Produced High Removal of Heavy Metal Ions at Low Dosage

Nurul Shuhada Mohd Makhtar et al.

Summary: This study demonstrated the high effectiveness of a plant-based Tacca leontopetaloides biopolymer flocculant in removing heavy metals in synthetic wastewater, showing promising potential for real wastewater treatment.

PROCESSES (2021)

Article Engineering, Environmental

Reduced graphene oxide (rGO) aerogel: Efficient adsorbent for the elimination of antimony (III) and (V) from wastewater

Srijita Nundy et al.

Summary: In this study, a 3D porous, thin sheet-like rGO aerogel was fabricated for the removal of antimony (Sb) ions from wastewater. The Langmuir isothermal and pseudo-second-order kinetic model were found to be the best fit for the adsorption process. The rGO aerogel showed high efficiency, good selectivity, and reusability, making it a practical material for Sb removal from tap water.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Biotechnology & Applied Microbiology

Synthesis and study of functionalized magnetic graphene oxide for Pb2+ removal from wastewater

Maryam Zarenezhad et al.

Summary: This study utilized magnetic graphene oxide nanocomposites functionalized with different amine ligands to remove Pb2+ from aqueous solutions. The synthesis and characterization of the nanocomposites, optimization of adsorption conditions, comparison of different functionalized adsorbents, as well as performance and recovery studies were conducted. The EDA functionalized MGO adsorbent showed an 8.8% decrease in Pb2+ adsorption efficiency after 5 successive cycles.

ENVIRONMENTAL TECHNOLOGY & INNOVATION (2021)

Article Chemistry, Physical

TiO2/PKSAC functionalized with Fe3O4 for efficient concurrent removal of heavy metal ions from water

Devagi Kanakaraju et al.

Summary: The successful synthesis of the TiO2/PKSAC/Fe3O4 composite material showed high removal efficiency for mixed heavy metal pollutants, even in the presence of coexisting ions, with good regenerative stability. This composite material can be effectively used for heavy metal removal in wastewater.

COLLOID AND INTERFACE SCIENCE COMMUNICATIONS (2021)

Article Engineering, Chemical

Enhanced removal efficiency of heavy metal ions by assembling phytic acid on polyamide nanofiltration membrane

Hongli Zhang et al.

Summary: A polyamide thin-film composite nanofiltration membrane incorporating phytic acid was developed for efficient removal of heavy metal ions, achieving record-breaking removal rates of Cd2+ and Pb2+ while maintaining excellent long-term stability and reusability. This work demonstrates the potential of the phytic acid-functionalized NF membrane as a promising platform for eliminating heavy metal ions in waste water.

JOURNAL OF MEMBRANE SCIENCE (2021)

Article Chemistry, Physical

Simultaneous removal of Ni(II) and Cr(VI) from aqueous solution by froth flotation using PNIPAM-CS intelligent nano-hydrogels as collector

Huijie Zheng et al.

Summary: The study investigated the feasibility of using thermo-responsive intelligent nano-hydrogels for removing Ni(II) and Cr(VI) from aqueous solutions simultaneously. Experimental results showed that the suitable PNIPAM to CS mass ratio was 2:1, with an appropriate pH of 6 for adsorption experiments. XPS analysis revealed that the adsorption of Ni(II) and Cr(VI) by PNIPAM-CS nano-hydrogels mainly involved electrostatic adsorption, ion exchange, and complexation. Froth flotation under specific conditions achieved removal percentages of 86.1% for Ni(II) and 91.5% for Cr(VI).

JOURNAL OF MOLECULAR LIQUIDS (2021)

Article Chemistry, Physical

Removal and reutilization of metal ions on ZIF-67/GO membrane via synergistic photocatalytic-photothermal route

Wenkai Pei et al.

Summary: The research presented a synergistic photocatalytic-photothermal system of integrated membrane for the removal and reutilization of aqueous Ag+ ions, offering a new direction for the future recycling of metal ions.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

Article Chemistry, Applied

Simultaneous adsorption of heavy metals and organic dyes by β-Cyclodextrin-Chitosan based cross-linked adsorbent

Muhammad Usman et al.

Summary: A new adsorbent NTA-beta-CD-CS was synthesized for the simultaneous removal of dyes and metals, showing high adsorption capacities and excellent regeneration performance, making it potentially promising for treating wastewater from various industries.

CARBOHYDRATE POLYMERS (2021)

Article Engineering, Environmental

Selective recovery of cobalt from mixed lithium ion battery wastes using deep eutectic solvent

Pier Giorgio Schiavi et al.

Summary: This study presents a method for selectively recovering cobalt from mixed lithium-ion battery electrode materials using a green deep eutectic solvent (DES). The optimized solvent extraction procedure efficiently recovers cobalt as cobalt oxalate, which is then used to produce high-performance lithium cobalt oxide cathode material. The demonstrated selectivity of the leaching method and the ability to reuse the residual DES solution offer a green recycling alternative for reintroducing strategic materials into the lithium-ion battery production chain.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Engineering, Environmental

Effect of dye structure on color removal efficiency by coagulation

Felix Mcyotto et al.

Summary: The study showed that the dye structures significantly affect the color removal efficiency by coagulation, and the best dye-coagulant combinations for dyes with the same structures and functional groups can enhance the removal efficiency. It was also found that dyes with the same auxochromes and charge exhibit similar color removal efficiency when treated with the same coagulant.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Engineering, Chemical

Comparative studies on the performance of ionic liquid and conventional solvent drops in extraction of phenol from water

Javad Saien et al.

Summary: This study systematically investigated the hydrodynamic and mass transfer performance of drops in liquid-liquid extraction of phenol pollutant using 1-hexyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ionic liquid. The results showed that smaller drops were produced with the ionic liquid due to lower interfacial tension, resulting in lower mass transfer coefficients compared to cumene. The findings suggest that the ionic liquid is promising for large-scale separation of phenol from aqueous solutions.

CHEMICAL ENGINEERING RESEARCH & DESIGN (2021)

Review Environmental Sciences

Bio-membrane based integrated systems for nitrogen recovery in wastewater treatment: Current applications and future perspectives

Yuanyao Ye et al.

Summary: Nitrogen removal is crucial in wastewater treatment to prevent eutrophication and degradation of aquatic ecosystems, while also recovering nitrogen for use as fertilizer. The membrane technique integrated with biological processes, such as BMIS, is a promising technology for nitrogen recovery from wastewater, with applications at both pilot- and full-scale levels. Challenges and recommendations for BMIS in nitrogen recovery were proposed, including the need for integrated technologies and more scale-up studies.

CHEMOSPHERE (2021)

Article Environmental Sciences

Biosorption of iron ions through microalgae from wastewater and soil: Optimization and comparative study

Shah Zada et al.

Summary: Microalgae were evaluated for their ability to remove Fe2+ iron ions from aqueous solutions, with five strains showing promising results in terms of bioremediation efficiency for both wastewater and soil. This study suggests that these selected microalgae strains have high potential as bioremediation tools for Fe2+ contaminated water and soil.

CHEMOSPHERE (2021)

Article Environmental Sciences

Polyvinylidene fluoride (PVDF)-α-zirconium phosphate (α-ZrP) nanoparticles based mixed matrix membranes for removal of heavy metal ions

Elham Abdulkarem et al.

Summary: This study prepared PVDF-alpha-ZrP mixed matrix membranes and evaluated the impact of alpha-ZrP nanoparticles on membrane performance. It was found that incorporating alpha-ZrP NPs increased the thermal and mechanical stability, flux, and reduced fouling propensity of the membranes.

CHEMOSPHERE (2021)

Article Environmental Sciences

Facile synthesis of economical feasible fly ash-based zeolite-supported nano zerovalent iron and nickel bimetallic composite for the potential removal of heavy metals from industrial effluents

Ganesh Kumar Reddy Angaru et al.

Summary: This study developed a novel nZVI/Ni@FZA bimetallic composite for the treatment of heavy metal contamination in industrial wastewater. The results showed that nZVI/Ni@FZA had high adsorption capacity and could effectively remove Cr(VI) and Cu(II) from water.

CHEMOSPHERE (2021)

Article Environmental Sciences

Energy-saving preparation of a bioflocculant under high-salt condition by using strain Bacillus sp. and the interaction mechanism towards heavy metals

Jing-qiu Hua et al.

Summary: A highly efficient bioflocculant Na-Bsp was successfully prepared using a tolerant strain Bacillus sp. under high-salt condition without sterilization. The as-prepared Na-Bsp exhibited high adsorption capacities towards heavy metals, making it a potential alternative adsorbent.

CHEMOSPHERE (2021)

Review Environmental Sciences

Lithium bioleaching: An emerging approach for the recovery of Li from spent lithium ion batteries

Parisa Moazzam et al.

Summary: The rapid growth in demand for lithium has led to a sharp increase in its price. Bioleaching process, as an alternative method for extracting valuable metals from spent LIBs, offers higher recovery rates and lower operating costs.

CHEMOSPHERE (2021)

Article Environmental Sciences

Adsorption mechanism of Zn2+, Ni2+, Cd2+, and Cu2+ ions by carbon-based adsorbents: interpretation of the adsorption isotherms via physical modelling

Fatma Dhaouadi et al.

Summary: The study investigated the adsorption mechanism of heavy metals Zn2+, Cd2+, Ni2+, and Cu(2+) on carbon-based adsorbents, revealing a multi-ionic process where ions interact with functional groups on the adsorbent surface simultaneously. The best adsorbent for heavy metal removal was obtained from CC biomass pyrolysis, and the adsorption energies were associated with physisorption-type forces.

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2021)

Article Engineering, Chemical

Phytoremediation of Cr(VI) in wastewater using the vetiver grass (Chrysopogon zizanioides)

Farai Masinire et al.

Summary: The study found that vetiver grass is effective in removing Cr(VI) from wastewater, with higher removal rates observed under acidic conditions and with higher grass density. At low initial concentrations, chromium was mainly distributed in the underground parts of the plants, while at higher concentrations, it accumulated in the leaf mass fraction.

MINERALS ENGINEERING (2021)

Article Metallurgy & Metallurgical Engineering

Solvent extraction of lanthanides(III) from chloride and nitrate media with di(2-ethylhexyl) phosphoric acid and ionic liquids in three-component biphasic solvent systems

V. V. Belova et al.

Summary: This study explores the use of multicomponent biphasic solvent systems in liquid-liquid chromatography for extracting lanthanides in hydrometallurgy. It was found that the addition of sodium acetate or mixtures can enhance the extraction efficiency, and effective separation methods were observed in the experiments.

HYDROMETALLURGY (2021)

Article Metallurgy & Metallurgical Engineering

Extraction of platinum(IV) by hydrophobic deep eutectic solvents based on trioctylphosphine oxide

Ronghao Liu et al.

Summary: In this study, hydrophobic deep eutectic solvents (HDESs) formed by trioctylphosphine oxide (TOPO) and environmentally friendly molecules were used for platinum (Pt) extraction from secondary resources. The extraction behaviors under different conditions were investigated, with the TOPO/1-butanol showing the best performance in Pt(IV) extraction. The ion-association mechanism in the extraction process was proposed, and optimal operating conditions were determined to improve recycling efficiency.

HYDROMETALLURGY (2021)

Article Biochemistry & Molecular Biology

Development and characterization of chitosan functionalized dialdehyde viscose fiber for adsorption of Au(III) and Pd(II)

Fenglei Liu et al.

Summary: The highly efficient fiber-based adsorbent DAVFs-CS shows excellent performance in selective separation and adsorption of precious metals, with maximum adsorption capacities reaching 322 mg/g and 207 mg/g. The surface functionalization of the adsorbent was confirmed using FT-IR, XPS, TGA, and NMR techniques, and the adsorption process followed Langmuir and PSO equations. Furthermore, the unique adsorption mechanism of DAVFs-CS enables it to resist the interference of co-existing impurities.

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES (2021)

Article Environmental Sciences

Thermodynamic, isothermal and kinetic studies of heavy metals adsorption by chemically modified Tanzanian Malangali kaolin clay

N. M. Malima et al.

Summary: This study focused on the modification of native Malangali kaolinite using HCl acid to improve its physicochemical properties, and examined the adsorption behavior of cadmium and cobalt ions on the modified kaolin. The results showed that the modified kaolinite exhibited increased pore diameter, pore volume, and surface area, making it an efficient adsorbent for heavy metals in polluted wastewater. The findings also revealed that the adsorption process was exothermic, spontaneous and involved monolayer adsorption on homogeneous active sites of the adsorbent.

INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (2021)

Article Biotechnology & Applied Microbiology

Efficient removal of Pb(II) ions from aqueous solution by using a novel functionalized bio-material with two tridentate coordinated units

Yu Guo et al.

Summary: A novel bio-adsorbent DAS2-AT was synthesized for the removal of Pb(II) ions from aqueous solution, demonstrating high adsorption capacity and selectivity, with a maximum adsorption capacity of 203 mg g(-1). The experimental results fit well with the Langmuir isotherm model and Pseudo-second-order model. Additionally, DAS2-AT showed good reusability and affinity for other metal ions.

JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY (2021)

Article Green & Sustainable Science & Technology

Efficient removal of arsenic from copper smelting wastewater via a synergy of steel-making slag and KMnO4

Yongkui Li et al.

Summary: The study proposes a cost-effective strategy for the disposal of high arsenic-bearing wastewater from copper smelting plant through the synergy of steel-making slag and permanganate. The synergy achieved an arsenic removal rate of 91.37% and a final residual arsenic concentration of 1.54 mg/L.

JOURNAL OF CLEANER PRODUCTION (2021)

Article Green & Sustainable Science & Technology

Efficient removal of As (III) by calcined green synthesized bimetallic Fe/Pd nanoparticles based on adsorption and oxidation

Yuanqiong Lin et al.

Summary: Arsenic pollution poses a major threat to global drinking water safety, and the use of Calcined-Fe/Pd NPs has been shown to effectively remove As (III) from wastewater. Characterization techniques revealed substantial As (III) adsorption and oxidation to As (V), leading to a proposed mechanism for arsenic removal based on adsorption and oxidation. Practical application demonstrated over 90% removal of As (III) from drinking water, validating the effectiveness of this method.

JOURNAL OF CLEANER PRODUCTION (2021)

Review Environmental Sciences

Fungal bioleaching of metals from refinery spent catalysts: A critical review of current research, challenges, and future directions

Ashish Pathak et al.

Summary: Fungal bioleaching is a promising eco-friendly technique for extracting valuable metals from spent catalysts generated by petroleum refining operations. Fungi have high metal extraction ability and adaptability, but challenges such as slower kinetics and health and safety concerns need to be addressed before commercial application.

JOURNAL OF ENVIRONMENTAL MANAGEMENT (2021)

Article Environmental Sciences

Recycling of Pd(0) catalysts by magnetic nanocomposites-microbial extracellular polymeric substances@Fe3O4

Lu Zhou et al.

Summary: The recovery of Pd from Pd(II) wastewater using microbial extracellular polymeric substances (EPS) and magnetic nanocomposite EPS@Fe3O4 was successful, showing excellent catalytic activity in methylene blue reduction. EPS@Fe3O4 proved to be an efficient adsorbent for Pd recovery, with high potential for practical applications.

JOURNAL OF ENVIRONMENTAL MANAGEMENT (2021)

Article Environmental Sciences

Lead removal from water using organic acrylic amine fiber (AAF) and inorganic-organic P-AAF, fixed bed filtration and surface-induced precipitation

Jinshan Wei et al.

Summary: Granular porous sorbents have been commonly used for heavy metals removal from water. In this study, an organic acrylic amine fiber (AAF) and phosphorus loading inorganic-organic AAF (P-AAF) were prepared and used for lead (Pb) removal from water. The study proposed a new strategy of inorganic-organic coupling technology for Pb removal, with P-AAF showing a better removal efficiency compared to AAF. This research contributes to our understanding of surface chemistry processes of Pb with P.

JOURNAL OF ENVIRONMENTAL SCIENCES (2021)

Article Environmental Sciences

Environmental investigation of bio-modification of steel slag through microbially induced carbonate precipitation

Junke Zhang et al.

Summary: This study investigates the leaching behavior of metals from steel slag before and after treatment by microbially induced carbonate precipitation (MICP), with the results showing a decrease in leaching concentrations of metals after MICP treatment. All elements studied had leachability below 0.5%, indicating the effectiveness of MICP in reducing metal leaching. MICP-treated steel slag can be reused as construction materials, meeting the leaching limit requirements set by U.S. EPA.

JOURNAL OF ENVIRONMENTAL SCIENCES (2021)

Article Engineering, Environmental

As(III) removal from wastewater and direct stabilization by in-situ formation of Zn-Fe layered double hydroxides

Qingwei Wang et al.

Summary: A novel method based on in-situ formation of ZnFe-As-LDHs was developed to effectively remove and stabilize As(III) from wastewater. Under optimal conditions, the As(III) concentration decreased significantly and met arsenic leaching criteria, with in-situ formed LDHs showing better performance compared to pre-formed LDHs, attributed to oxidation of As(III) and co-precipitation with Zn and Fe.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Engineering, Environmental

Dual-functional Sites for Selective Adsorption of Mercury and Arsenic ions in [SnS4]4-/MgFe-LDH from Wastewater

Shutang Li et al.

Summary: In this study, [SnS4](4-) clusters and MgFe-based layered double hydroxide (LDH) were assembled to synthesize [SnS4](4-)/LDH composites, which showed excellent removal performance for mercury and arsenic. The composite effectively adsorbed the heavy metals by enlarging surface areas and creating a hierarchical pore channel, and dynamic analysis revealed different adsorption mechanisms. The pseudo-second-order kinetic model was found suitable for both Hg(II) and As(III) adsorption, with promising potential for mercury recycling from the spent materials.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Engineering, Environmental

Adsorption behavior of heavy metal ions on a polymer-immobilized amphoteric biosorbent: Surface interaction assessment

Chaofan Zheng et al.

Summary: The study introduced a novel magnetically separable amphoteric biosorbent (PD-Fe3O4@CCS) and evaluated its adsorption behavior towards Cr(VI) and Cu(II) ions. Results showed that the biosorbent exhibited promising potential for large-scale application, with good reusability and stability. Surface interactions between PD-Fe3O4@CCS and heavy metal ions were systematically analyzed through FTIR and XPS, providing valuable insights for understanding biosorbent-contaminant interactions in wastewater.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Engineering, Environmental

Arsenic speciation and biotransformation pathways in the aquatic ecosystem: The significance of algae

Muhammad Mahroz Hussain et al.

Summary: Arsenic contamination of aquatic systems is a global threat that can harm both humans and other living organisms, and algae play an important role in the biotransformation of arsenic. This review provides an in-depth exploration of various sources of arsenic, its distribution in water bodies, and the factors influencing its behavior in aquatic ecosystems, as well as the potential role of algae in arsenic remediation.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Engineering, Environmental

Contribution of pristine and reduced microbial extracellular polymeric substances of different sources to Cu(II) reduction

Hang Xu et al.

Summary: This study highlights the significant role of microbial EPS as reducing agents and electron transfer mediators for cupric reduction and cuprous formation in natural environments. EPS from different microbial species showed varied electron transfer ability, with c-type cytochromes playing a major role in copper transformation for Shewanella oneidensis MR-1 EPS, while functional groups like phenolic and amide dominated Cu(II) reduction for Bacillus subtilis and Saccharomyces cerevisiae EPS.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Review Engineering, Environmental

Recent advances in the removal of pharmaceuticals and endocrine-disrupting compounds in the aquatic system: A case of polymer inclusion membranes

Ayo Olasupo et al.

Summary: The presence of pharmaceuticals and endocrine-disrupting compounds in aquatic systems has raised concerns due to their potential threats to aquatic organisms and human health. Conventional wastewater treatment plants have limitations in removing these contaminants, leading to the exploration of advanced treatment processes. Polymer inclusion membranes (PIMs) are considered a promising technology for water treatment, with high efficiency in removing contaminants from water.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Engineering, Environmental

Integrated remediation of sulfate reducing bacteria and nano zero valent iron on cadmium contaminated sediments

Qing Zhao et al.

Summary: Integrated-remediation technologies using sulfate reducing bacteria (SRB) and nano zero valent iron (nZVI) have shown great potential in immobilizing Cd in contaminated sediments, particularly with higher doses of nZVI. The study identified five typical SRBs that play a significant role in transforming Cd speciation and stabilizing it into sulfide precipitation through dissimilatory sulfate reduction (DSR). The results suggest that nZVI may stimulate SRB bio-immobilization by providing electrons and enhancing enzyme activities during DSR, leading to the formation of Cd-S-Fe complexes.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Engineering, Environmental

Robust cellulose-based composite adsorption membrane for heavy metal removal

Xiaopeng Pei et al.

Summary: The regenerated cellulose support membrane, with stable and covalent-bonded polyelectrolyte active layers, shows high efficiency in adsorbing multiple heavy metal ions from water, with tunable water flux and long-term stability.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Engineering, Environmental

Simultaneous recovery of phosphorus and nitrogen from sewage sludge ash and food wastewater as struvite by Mg-biochar

Moh Moh Thant Zin et al.

Summary: This study explores the use of designed biochar for nutrient recovery from nutrient-rich wastewater as struvite, with high recovery rates of both P and N achieved. Mg-biochars demonstrate higher struvite selectivity and utilize adsorption, precipitation, and cation-exchange mechanisms for nutrient recovery.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Chemistry, Multidisciplinary

Tough dual-network GAMAAX hydrogel for the efficient removal of cadmium and nickle ions in wastewater treatment applications

Elham Jafarigol et al.

Summary: A dual network GAMAAX hydrogel was synthesized through free radical polymerization method for the removal of heavy metal ions, showing excellent adsorption capacity and electrical conductivity for a wide range of pH and adsorption dosages. The experimental results demonstrated remarkable heavy metal ion adsorption efficiency and reusability of the hydrogel.

JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY (2021)

Article Chemistry, Physical

Enhancing surface interactions between humic surfactants and cupric ion: DFT computations coupled with MD simulations study

Shengpeng Su et al.

Summary: This study systematically investigated the surface interactions between humics and cupric ions, revealing that enhancing the number of carboxyl groups can strengthen the interactions. Furthermore, the introduction of abundant carboxyl groups on humic surfaces significantly improves the surface interactions with cupric ions compared to regular humics.

JOURNAL OF MOLECULAR LIQUIDS (2021)

Article Engineering, Environmental

Adsorbability of Modified PBS Nanofiber Membrane to Heavy Metal Ions and Dyes

Mao Fan et al.

Summary: The study investigated the adsorption capacity of rhodamine-loaded PBS electrostatic spinning film for heavy metal ions and dyes, showing promising adsorption performance. Dynamic adsorption tests showed fast adsorption rates for CR and CV, with adsorption capacities of 111.2 and 83.0 mg/g within 10 seconds, while adsorption kinetics and isotherm studies indicated a transition from physical adsorption to chemisorption in the adsorption process.

JOURNAL OF POLYMERS AND THE ENVIRONMENT (2021)

Article Engineering, Chemical

Lead (Pb) sorption and co-precipitation on natural sulfide, sulfate and oxide minerals under environmental conditions

Rahul Ram et al.

Summary: This study investigates the adsorption of lead on various common minerals, revealing the partitioning behavior between solids and the aqueous phase under different conditions. Different minerals show distinct affinity for lead adsorption, influenced by solution pH and lead concentration.

MINERALS ENGINEERING (2021)

Article Nanoscience & Nanotechnology

Alginate coated layered double hydroxide/reduced graphene oxide nanocomposites for removal of toxic As (V) from wastewater

V. Nithya Priya et al.

Summary: In this study, Sodium Alginate coated Fe-Al layered double hydroxide/reduced Graphene Oxide nanoadsorbents were synthesized and exhibited high efficiency in removing As (V) ions. Characterization analyses including XRD, FESEM, HRTEM, and FTIR were conducted to study the adsorbents. Equilibrium batch techniques and kinetic models were employed to investigate the adsorption process, showing a good fit with the Langmuir isotherm model and the Pseudo second order model, respectively. The results indicate that the nanocomposite with high wt% of SA demonstrated excellent removal efficiency for As (V) ions.

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES (2021)

Article Engineering, Environmental

Enhanced dynamic Cu(II) ion removal using hot-pressed chitosan/poly (vinyl alcohol) electrospun nanofibrous affinity membrane (ENAM)

Mostafa Managheb et al.

Summary: Different multilayer electrospun nanofibrous membranes were prepared to study the effects of various parameters on Cu(II) ions removal, and it was found that ENAMs prepared with hot-pressing and specific CTS/PVA solutions showed good performance. The study demonstrated that these membranes can effectively recover flux and are reusable.

PROCESS SAFETY AND ENVIRONMENTAL PROTECTION (2021)

Review Environmental Sciences

Uranium bioremediation with U(VI)-reducing bacteria

Wenbo You et al.

Summary: This review systematically summarizes the remediation of U(VI) contamination using microbial reduction, including mechanisms and influencing factors. In situ remediation is shown to be more effective for large-scale degradation of uranium contaminants, but reduction products can be reoxidized when exposed to oxygen and nitrate, compromising the remediation effects.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Environmental Sciences

Microscopic mechanism about the selective adsorption of Cr(VI) from salt solution on nitrogen-doped carbon aerogel microsphere pyrolysis products

Jiahao Li et al.

Summary: A series of nitrogen-doped carbon aerogels showed significantly enhanced adsorption efficacy of hexavalent chromium from wastewater. The aerogels demonstrated superior adsorption capacity, reduced toxic Cr(VI) to less toxic Cr(III), and maintained acceptable performance after multiple cycles, indicating promising prospects for selective removal of Cr(VI) ions.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Environmental Sciences

Adsorption of Pb(II) and Cd(II) by magnetic activated carbon and its mechanism

Zhen Zhang et al.

Summary: Magnetized activated carbons (MAC) prepared from rape straw powder showed high adsorption capacities for Pb(II) and Cd(II) due to surface active points, with adsorption behavior conforming to the Freundlich model and pseudo-second-order kinetic model. Thermodynamic parameters indicated spontaneous and endothermic reactions. Adjusting the pH of the solution could enhance adsorption capacity, but competitive adsorption occurred in the presence of high-valent ions. Adsorption mechanisms included electrostatic attraction, surface complexation, and co-precipitation. The MAC material showed potential for heavy metal ion removal from aqueous solutions.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Environmental Sciences

Cadmium, lead and mercury in the blood of psoriatic and vitiligo patients and their possible associations with dietary habits

Marta Wacewicz-Muczynska et al.

Summary: The study aimed to assess the influence of dietary habits on the concentration of Cd, Pb and Hg in patients with psoriasis and vitiligo. Elevated levels of these toxic elements could increase oxidative stress and contribute to inflammation in the pathogenesis of skin disorders. Food habits have impact on the content of examined toxic metals in the blood of patients, which may be useful for composing the diet and prevention of psoriasis and vitiligo.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Environmental Sciences

Adsorption of Cr(VI) from aqueous solutions using novel activated carbon spheres derived from glucose and sodium dodecylbenzene sulfonate

Hanjing Xu et al.

Summary: Chemically activated carbon spheres were synthesized for the removal of Cr(VI) from aqueous solutions, showing high adsorption capacity and potential application prospects. The adsorption process of the activated carbon spheres towards Cr(VI) was mainly through single molecular layer adsorption and chemisorption, indicating their effectiveness in removing Cr(VI) pollutants.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Environmental Sciences

Enhancement of selective adsorption of Cr species via modification of pine biomass

Jingjing Zhao et al.

Summary: The study found that Pine/TiO2 has higher adsorption capacity for Cr(VI) ions due to the presence of TiOH2+-ligroups on the surface of TiO2 microparticles, while PG has higher adsorption capacity for Cr(III) ions mainly through cation exchange.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Environmental Sciences

A novel modified method for the efficient removal of Pb and Cd from wastewater by biochar: Enhanced the ion exchange and precipitation capacity

Jiawen Wu et al.

Summary: The study aimed to enhance the sorption ability of Pb and Cd by promoting ion exchange and precipitation capacities of biochar. Modification with magnesium significantly increased the adsorption capacity of Mg-coated biochar for Pb and Cd, dominantly through ion exchange and mineral precipitation mechanisms.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Engineering, Chemical

Highly efficient and selective recovery of Cu(II) from wastewater via ion flotation with amidoxime functionalized graphene oxide as nano collector

Luping Chang et al.

Summary: In this study, amidoxime functionalized graphene oxide (AMID@GO) was prepared as a nano collector for enhancing and selectively recovering Cu(II) from wastewater via ion flotation, showing significantly improved adsorption capacity and selectivity. The experimental results indicated that AMID@GO could be reused and maintained high Cu(II) recovery rates after multiple cycles. Density functional theory (DFT) calculation suggested that the stable configuration of AMID@GO@Cu(II) complexes contributed to its higher selectivity coefficient for Cu(II).

SEPARATION AND PURIFICATION TECHNOLOGY (2021)

Article Engineering, Chemical

Recent advances in magnesium/lithium separation and lithium extraction technologies from salt lake brine

Ying Sun et al.

Summary: In recent years, there has been extensive research on technologies for extracting and separating magnesium/lithium from salt lake brines, including adsorption, membrane, electrochemical, and reaction-coupled methods. While various methods have different characteristics and adaptabilities, membrane methods have attracted attention due to their low energy consumption and high separation rates.

SEPARATION AND PURIFICATION TECHNOLOGY (2021)

Article Engineering, Chemical

Eco-friendly flocculants from chitosan grafted with PNVCL and PAAc: Hybrid materials with enhanced removal properties for water remediation

Eduardo Hermosillo-Ochoa et al.

Summary: This study addressed the preparation of environmental friendly flocculants derived from biobased chitosan grafted with biocompatible poly(N-vinylcaprolactam) (PNVCL) and poly(acrylic acid) (PAAc), as well as their evaluation in the removal of turbidity, ciprofloxacin (CIP) and cadmium (Cd(II)) from contaminated water. The results showed that graft copolymers led to better removal of contaminants compared to unmodified chitosan and PNVCL homopolymer, especially at higher temperatures. Flocculants containing both PNVCL and PAAc grafts allowed close to 95% removal of CIP and Cd(II) in single contaminant flocculation experiments.

SEPARATION AND PURIFICATION TECHNOLOGY (2021)

Review Environmental Sciences

Environmental Applications of Nanotechnology: Nano-enabled Remediation Processes in Water, Soil and Air Treatment

Stuart Linley et al.

Summary: Environmental remediation has been transformed by the integration of engineered nanoscale materials over the past two decades. The rapid growth of nanotechnology in environmental applications signifies its importance, with challenges mainly addressed through chemical reactions or adsorption processes. While these fields share treatment mechanisms, the unique challenges in implementation require specific solutions.

WATER AIR AND SOIL POLLUTION (2021)

Article Engineering, Environmental

Temperature regulated adsorption and desorption of heavy metals to A-MIL-121: Mechanisms and the role of exchangeable protons

Chenghan Ji et al.

Summary: A novel thermoresponsive absorbent, A-MIL-121, was successfully synthesized to effectively remove trace Cu(II) from high salinity water and quickly desorb at elevated temperature. The material showed stable performance in adsorption-desorption cycles, indicating its potential to address trace heavy metals in wastewater.

WATER RESEARCH (2021)

Review Environmental Sciences

Heavy-Metal Phytoremediation from Livestock Wastewater and Exploitation of Exhausted Biomass

Monika Hejna et al.

Summary: Using phytoremediation to reduce wastewater pollution from livestock production helps to maintain water conservation.

INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH (2021)

Article Engineering, Environmental

Self-regenerable bio-hybrid with biogenic ferrous sulfide nanoparticles for treating high-concentration chromium-containing wastewater

Xian-Zhong Fu et al.

Summary: A self-regenerable bio-hybrid composed of bacterial cells and bio-FeS was developed for efficient removal of chromium, maintaining high activity within consecutive treatment-regeneration cycles. This innovative approach offers a promising new avenue for sustainable treatment of heavy metal-containing wastewater.

WATER RESEARCH (2021)

Review Chemistry, Multidisciplinary

Adsorption of thallium from wastewater using disparate nano-based materials: A systematic review

Sumihar Hutapea et al.

Summary: This paper reviews the development of adsorption techniques for removing thallium, with a focus on the use of nano-based materials as promising adsorbents. The toxic effects of thallium on humans are also discussed. The authors compare the positive and negative aspects of different treatment techniques and propose promising technologies for thallium removal.

ARABIAN JOURNAL OF CHEMISTRY (2021)

Article Engineering, Chemical

Simultaneous Removal of Al, Cu and Zn Ions from Aqueous Solutions Using Ion and Precipitate Flotation Methods

Piotr Rybarczyk et al.

Summary: This study investigated the simultaneous removal of Al(III), Cu(II), and Zn(II) from dilute aqueous solutions using ion and precipitate flotation methods. Results showed that satisfactory simultaneous flotations were achieved when the pH value was between 7.0 and 9.0. Increase in collector concentration led to a decrease in flotation rate constants, while an increase in gas velocity resulted in higher ion and precipitate flotation rates.

PROCESSES (2021)

Article Engineering, Environmental

Fenton/ozone-based oxidation and coagulation processes for removing metals (Cu, Ni)-EDTA from plating wastewater

Manh Khai Nguyen et al.

Summary: The study identified the optimal conditions for the combined/ hybrid process of advanced oxidation and coagulation to effectively treat metals-EDTA containing wastewater from an electroplating manufacturer in Vietnam, achieving removal rates of 99.7% for Ni and 99.72% for Cu. The effluent of wastewater after the treatment process met the Vietnamese national regulation on industrial wastewater.

JOURNAL OF WATER PROCESS ENGINEERING (2021)

Article Biotechnology & Applied Microbiology

Cobalt-loaded resin can effectively remove arsenic in wastewater

Zhixu Lu et al.

Summary: This study focuses on the Cobalt-loaded resin removal of As(V) in wastewater, showing rapid adsorption and high removal efficiency. The Co-loaded resin material provides a simple and effective means to remove As(V) from high-As(V) wastewater.

ENVIRONMENTAL TECHNOLOGY & INNOVATION (2021)

Article Chemistry, Multidisciplinary

Solvent extraction of rare-earth elements with ionic liquids: Toward a selective and sustainable extraction of these valuable elements

Esteban Quijada-Maldonado et al.

Summary: This review analyzes the performance of ionic liquids (ILs) as separating media for selective and sustainable extraction of rare-earth elements (REEs), showing high selectivities in separating heavy from light REEs, but facing challenges in adjacent REE separation. Insights are provided for selective and sustainable extraction of REEs using ILs.

CURRENT OPINION IN GREEN AND SUSTAINABLE CHEMISTRY (2021)

Article Nanoscience & Nanotechnology

Hydrophobic Porous Polypropylene with Hierarchical Structures for Ultrafast and Highly Selective Oil/Water Separation

Yifeng Huang et al.

Summary: By utilizing hierarchically porous polypropylene instead of increasing pumping pressure or enlarging primary pores, the oil removal throughput can be significantly enhanced without compromising oil/water separation selectivity.

ACS APPLIED MATERIALS & INTERFACES (2021)

Review Agricultural Engineering

Efficiency of bacteria and bacterial assisted phytoremediation of heavy metals: An update

Pooja Sharma

Summary: This review addresses the enhancement of phytoremediation efficiency of heavy metals and advances in wastewater treatment through plant-associated bacteria. It highlights the potential of bacteria to promote plant growth and resistance under stress conditions by controlling growth hormone, nutrition security, producing siderophore, secondary metabolites, and improving the antioxidant enzymes system. The review also explores the concepts, applications, and factors affecting bacteria assisted phytoremediation.

BIORESOURCE TECHNOLOGY (2021)

Article Chemistry, Applied

Cellulose-based electrospun nanofiber membrane with core-sheath structure and robust photocatalytic activity for simultaneous and efficient oil emulsions separation, dye degradation and Cr(VI) reduction

Wanli Lu et al.

Summary: In this study, a cellulose-based photocatalytic ENM was successfully developed for efficient removal of oils, dyes, and chromium ion from wastewater. The core-sheath structured ENM showed outstanding performance with simultaneous high removal efficiency, and it also exhibited long-term reusability due to its self-cleaning function.

CARBOHYDRATE POLYMERS (2021)

Article Engineering, Environmental

Synergistic dual-pyrazol sites of metal-organic framework for efficient separation and recovery of transition metals from wastewater

Baosheng Liu et al.

Summary: The study demonstrated the successful separation and selective capture of Cu2+ using stable MOF-303, showing high adsorption capacity and separation selectivity. Experimental results indicate that MOF-303 is a promising adsorbent for metal separation and recovery.

CHEMICAL ENGINEERING JOURNAL (2021)

Review Environmental Sciences

Micro/nano-machines for spilled-oil cleanup and recovery: A review

T. D. Minh et al.

Summary: This review focuses on the application of nanomotors and micromotors in oil spill cleanup and recovery, detailing their fundamental concepts and latest advancements. The study examines the behaviors of these nano and micro machines in different water matrices and their roles in oil removal, identifying areas for improvement. Additionally, strategies for surface and structural modification of these tiny machines to enhance their reactivity are discussed, highlighting the importance of customized design.

CHEMOSPHERE (2021)

Article Environmental Sciences

Batch adsorption studies on surface tailored chitosan/orange peel hydrogel composite for the removal of Cr(VI) and Cu(II) ions from synthetic wastewater

S. Pavithra et al.

Summary: This study focused on removing heavy metals chromium and copper ions from wastewater using a biodegradable and cost-effective chitosan-based hydrogel composite. Experimental results revealed the optimum adsorption conditions and determined the adsorption isotherm models and kinetics.

CHEMOSPHERE (2021)

Article Environmental Sciences

Simultaneous removal of Cu(II) and reactive green 6 dye from wastewater using immobilized mixed fungal biomass and its recovery

A. Saravanan et al.

Summary: The study investigated the use of immobilized fungal biomass for the simultaneous removal of Cu(II) ion and Reactive Green 6 dye from water. Optimal conditions included 25 mg/L of adsorbate concentration, 60 minutes equilibrium time, 2.5 g of fungal biomass, temperature of 303 K, and pH of 5.0. Langmuir isotherm model showed high correlation, while pseudo-first order and pseudo-second order kinetics were found to be suitable for Cu(II) ion and Reactive Green dye removal.

CHEMOSPHERE (2021)

Article Chemistry, Physical

Ion flotation of palladium by using cationic surfactants ? Effects of chloride ions

Luong H. V. Thanh et al.

Summary: This study examined the flotation separation of palladium (Pd) from dilute solutions, showing that Cl- forms complexes with Pd2+ ion, impacting Pd's solubility and the efficiency of separation. Different collectors were tested, with cetyltrimethylammonium bromide (CTAB) and 1-hexadecyltrimethylammonium chloride (HDTAC) demonstrating effective separation of Pd. The electrostatic interaction between cationic collectors and anionic Pd-Cl species was identified as the main mechanism for Pd flotation separation in this study.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2021)

Article Chemistry, Physical

Adsorption of heavy metals in water by modifying Fe3O4 nanoparticles with oxidized humic acid

Shuwen Xue et al.

Summary: The novel adsorbent HA-O/Fe3O4 exhibited fast kinetic performance and high adsorption capacities for heavy metal ions, showing effectiveness in various environmental conditions. It demonstrated good sustainability, reusability, and stability in adsorption of heavy metals, with negligible desorption and meeting industrial and drinking water standards.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2021)

Review Environmental Sciences

Ornamental plants for the phytoremediation of heavy metals: Present knowledge and future perspectives

Aqib Hassan Ali Khan et al.

Summary: Use of ornamental plants in phytoremediation for heavy metals is a novel approach with various potential benefits. These plants can help remove contaminants, improve aesthetics, and have lower risk of bioaccumulation compared to crop plants. The study presents interdisciplinary features and understanding for sustainable treatment of heavy metals.

ENVIRONMENTAL RESEARCH (2021)

Article Engineering, Chemical

Membrane Separation Process Design and Intensification

Salih Emre Demirel et al.

Summary: Membrane separation technology is of significant interest to the chemical industry due to its compactness, energy efficiency, and modularity. A prototype software framework has been developed for automated design, optimization, intensification, and analysis of various membrane systems. Case studies demonstrate the utility of this approach in achieving substantially better solutions compared to existing designs in literature.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2021)

Article Materials Science, Multidisciplinary

Use of Phytic Acid for the Removal of Iron in Hot Acidic Leachate from Zinc Hydrometallurgy

Julien Comel et al.

Summary: This study investigated the possibility of using phytic acid to remove iron in zinc hydrometallurgy. Results showed that at pH = 2.1, up to 99.5% of iron could be removed with a loss of zinc equal to 0.6%. Even though the amount of residue is higher, iron phytate could be stored in less drastic conditions than jarosite.
Review Materials Science, Multidisciplinary

Review: Research Progress on Liquid-Liquid Extraction of Chromium

Zhaobo Liu et al.

Summary: The widespread application of chromium will increase the impact of chromium-containing effluents on the environment and human health. This review focuses on the liquid-liquid extraction of chromium, providing insights into the treatment of different chromium species and detailing the extraction processes of Cr(VI) and Cr(III) with analysis of their oxidation and aging effects. The review serves as a theoretical foundation for selecting ion hosts and optimizing chromium removal processes by solvent extraction.
Article Biotechnology & Applied Microbiology

Cu(II) and Cd(II) capture using novel thermosensitive hydrogel microspheres: adsorption behavior study and mechanism investigation

Jianxin Tang et al.

Summary: The novel thermosensitive hydrogel microspheres NH2-SA/PNIPA exhibited higher adsorption efficiency for cadmium and copper ions, with different adsorption capacities at different temperatures due to hydration differences. The diffusion coefficients were approximately 1 x 10(-11) m(2) s(-1), and the adsorption process was mainly controlled by complexation reactions. Overall, NH2-SA/PNIPA showed high diffusibility and stable adsorption performance even after multiple cycles, providing a theoretical basis for improving adsorbents for heavy metal removal in wastewater.

JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY (2021)

Article Green & Sustainable Science & Technology

Enhancing the ion flotation removal of Cu(II) via regulating the oxidation degree of nano collector-graphene oxide

Luping Chang et al.

Summary: Graphene oxide as a nano collector can enhance the removal of Cu(II) by adjusting its oxidation degree, leading to higher removal efficiency and better separation performance.

JOURNAL OF CLEANER PRODUCTION (2021)

Article Green & Sustainable Science & Technology

Arti fi cial intelligence based ensemble modeling of wastewater treatment plant using jittered data

Vahid Nourani et al.

Summary: This study utilized black box artificial intelligence models and linear models to predict complex processes, with support vector regression model providing the best results. By using data post-processing, jittering data pre-processing methods, and ensemble models, the prediction accuracy can be increased by up to 20%.

JOURNAL OF CLEANER PRODUCTION (2021)

Article Green & Sustainable Science & Technology

I - Ecologically responsible and efficient recycling of Pd from aqueous effluents using biosorption on biomass feedstock

Armelle Garcia et al.

Summary: In the current study, a novel process of Pd biosorption using natural materials derived from plant feedstocks was described. Eichhornia crassipes exhibited excellent Pd biosorption performance, and the optimized process was successfully applied to other natural materials, achieving selective separation of Pd from other platinum group metals.

JOURNAL OF CLEANER PRODUCTION (2021)

Review Green & Sustainable Science & Technology

A review on conventional and novel materials towards heavy metal adsorption in wastewater treatment application

Wai Siong Chai et al.

Summary: Wastewater treatment is still a critical issue globally, and the removal of heavy metals is of utmost importance. Adsorption is the most common technique, with activated carbon being the traditional adsorbent, but facing challenges in separation and cost. Novel materials show competitiveness with excellent attributes like large surface area and high chemical inertness, presenting a promising future for heavy metal adsorption in wastewater treatment.

JOURNAL OF CLEANER PRODUCTION (2021)

Article Environmental Sciences

Novel adsorptive PVC nanofibrous/thiol-functionalized TNT composite UF membranes for effective dynamic removal of heavy metal ions

M. Hezarjaribi et al.

Summary: The study focuses on the preparation and assessment of electrospun adsorptive nanofiber membranes for the removal of toxic Ni(II) and Cu(II) from wastewater, showing excellent removal efficiency with the incorporation of thiol-modified titanate nanotubes.

JOURNAL OF ENVIRONMENTAL MANAGEMENT (2021)

Article Environmental Sciences

Valorisation options for Zn and Cu recovery from metal influenced acid mine waters through selective precipitation and ion-exchange processes: promotion of on-site/off-site management options

X. Vecino et al.

Summary: This study proposed an integration of selective precipitation and ion-exchange processes for the separation and recovery of valuable transition metal ions such as copper and zinc from acid mine waters. The experimental results showed high removal efficiency and extraction performance for both metals.

JOURNAL OF ENVIRONMENTAL MANAGEMENT (2021)

Article Engineering, Environmental

Removal of Cd(II) using dithiocarboxyl cornstalk and the waste filtrate

Xiaolong Cheng et al.

Summary: A novel adsorbent, DTCS, was developed for efficient removal of Cd(II) with favorable parameters. The waste filtrate from DTCS preparation also showed potential as a flocculant for wastewater treatment containing Cd(II).

JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING (2021)

Article Engineering, Environmental

Electrostatic assembly construction of polysaccharide functionalized hybrid membrane for enhanced antimony removal

Jianqiang Zeng et al.

Summary: A novel thin film nanocomposite (TFN) membrane comprising an alginate (SA) selective layer and a polyether sulfone (PSF) support membrane incorporating chitosan functionalized iron nanocomposite has been developed for antimony (Sb) removal. The membrane has strong removal capacity and tolerable reversibility towards Sb removal, demonstrating enhanced removal capacity for Sb species.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Engineering, Environmental

Effect of speciation and composition on the kinetics and precipitation of arsenic sulfide from industrial metallurgical wastewater

Pieter Ostermeyer et al.

Summary: Arsenic precipitation as As2S3 is effective for removal, but the efficiency is influenced by the composition of the wastewater and the S:As ratio. Flocculation and coagulation characteristics of As2S3 particles are affected by the speciation of arsenic.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Engineering, Environmental

Fe3O4-FeMoS4: Promise magnetite LDH-based adsorbent for simultaneous removal of Pb (II), Cd (II), and Cu (II) heavy metal ions

Elham Sadati Behbahani et al.

Summary: The study introduces a novel nanocomposite material with efficient adsorption capacity for heavy metal ions, demonstrating its superior performance through experiments and optimized parameters. The material's enhanced efficiency comes from synergistic effects and electrostatic attraction, as well as the ability for efficient regeneration and reuse.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Engineering, Environmental

A regenerable ion-imprinted magnetic biocomposite for selective adsorption and detection of Pb2+ in aqueous solution

Pian Wu et al.

Summary: A regenerable ion-imprinted magnetic biocomposite (IIMB) was successfully synthesized for simultaneous removal of Pb2+ using Serratia marcescens and carboxymethyl chitosan (CMC) as functional carriers, with Fe3O4 as the magnetic component. The IIMB showed significant uptake ability towards Pb2+ and could sensitively detect Pb2+ through coupling with flame atomic absorption spectrometry (IIMB-FAAS), providing insights into wastewater treatment, water quality inspection, and environmental remediation.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Review Chemistry, Multidisciplinary

Hydrophobic deep eutectic solvents: Current progress and future directions

Mohamad Hamdi Zainal-Abidin et al.

Summary: Deep eutectic solvents (DESs) are a promising category of green solvents with biocompatibility and tunable properties. Hydrophobic DESs (HDESs), a subclass of traditional DESs, are considered to address stability issues when in contact with water. Although HDESs remain briefly addressed in the literature, they have been widely studied for the isolation and extraction of various compounds.

JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY (2021)

Article Engineering, Chemical

Maximizing selectivity: An analysis of isoporous membranes

Ruben Z. Waldman et al.

Summary: Membranes are important candidates for industrial separation processes, but face trade-offs between permeability and selectivity. Isoporous membranes with uniform nanoscale pore size have attracted research interest, but quantitative analysis of their performance is lacking.

JOURNAL OF MEMBRANE SCIENCE (2021)

Article Chemistry, Physical

New insight in adsorption of Sb(III)/Sb(V) from waters using magnetic nanoferrites: X-ray absorption spectroscopy investigation

Yao-Jen Tu et al.

Summary: This study synthesized six kinds of magnetic nanoferrites to investigate their ability in removing Sb(III) and Sb(V) from aquatic systems. The results showed that ZnFe2O4 had great potential to adsorb and oxidize Sb(III) in aqueous solutions, providing essential information for designing a rapid and effective Sb removal technique.

JOURNAL OF MOLECULAR LIQUIDS (2021)

Article Electrochemistry

Recovery of Iridium by Solvent Extraction and Direct Electrodeposition Using Phosphonium-Based Ionic Liquids

Masahiko Matsumiya et al.

Summary: The extraction behavior and electrochemical behavior of Ir(IV) in a phosphonium-based ionic liquid system were studied, showing that Ir(IV) is reduced to metallic Ir in two steps. Diffusion coefficients of the extracted Ir(IV) species in the IL were determined, and consecutive solvent extraction and electrodeposition experiments were conducted.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2021)

Article Engineering, Chemical

Environmentally benign hydrophobic deep eutectic solvents for palladium(II) extraction from hydrochloric acid solution

Nian Tang et al.

Summary: Novel hydrophobic deep eutectic solvents (DESs) were synthesized and used for the recovery of palladium(II) from acid solution, showing excellent performance, selectivity, and reusability under optimized conditions. The extraction mechanism involves an anion exchange reaction, and the DES phase efficiently recovers palladium(II) as elemental palladium.

JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS (2021)

Review Soil Science

Advances in fungal-assisted phytoremediation of heavy metals: A review

Muhammad Khalid et al.

Summary: Trace metals are essential for plant growth but can be toxic in excess. Phytoremediation is a promising technique for cleaning polluted soils, but it has some disadvantages.

PEDOSPHERE (2021)

Review Engineering, Environmental

A review of technologies for the phenolic compounds recovery and phenol removal from wastewater

Khairul Anwar Mohamad Said et al.

Summary: The excessive amount of phenol found in water reservoirs, such as rivers and municipal drains, is a major contributor to the global scarcity of potable water. In recent years, special attention has been given to photocatalytic membranes for the treatment of polluted phenol water. Membrane technology, with its dual function of photocatalysis and sieving, may become a major trend in phenol removal in the future.

PROCESS SAFETY AND ENVIRONMENTAL PROTECTION (2021)

Article Environmental Sciences

Removal mechanism of Sb(III) by a hybrid rGO-Fe/Ni composite prepared by green synthesis via a one-step method

Ze Lin et al.

Summary: Due to global concern over the annual influx of antimony into the environment, a functional nanomaterial composite (rGO-Fe/Ni) was prepared and demonstrated significant potential for removing Sb(III) with an efficiency of 69.7%.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Environmental Sciences

Co-precipitation of Cu and Zn in precipitation of struvite

Xingwen Lu et al.

Summary: This study investigated the influence of Cu and Zn on the precipitation of struvite, showing that the addition of Cu and/or Zn can disrupt the crystalline growth of struvite and promote the formation of amorphous phases. When Cu and Zn coexisted, there was competitive binding of PO4 between the two metals. Overall, the presence of Cu and Zn during struvite formation greatly affects its content by forming different metal-containing products.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Engineering, Chemical

Recycling copper and gold from e-waste by a two-stage leaching and solvent extraction process

Mudila Dhanunjaya Rao et al.

Summary: The new hydrometallurgical route allows for the complete recycling of copper and gold from WPCBs under relatively benign laboratory conditions, serving as a proof of concept for liberating valuable and critical metals back into active service from end-of-life electronic devices.

SEPARATION AND PURIFICATION TECHNOLOGY (2021)

Article Engineering, Chemical

Solvent extraction of metals: Role of ionic liquids and microfluidics

Mahdieh Razi Asrami et al.

Summary: Microfluidic technology combined with ionic liquids has shown significant advancements in separation processes, enhancing efficiency and selectivity. Helical coiling intensifies internal recirculation for advanced mass transfer, while the use of ionic liquids and microfluidic devices offer a more compact, efficient, and faster alternative for metal extraction.

SEPARATION AND PURIFICATION TECHNOLOGY (2021)

Article Engineering, Chemical

Efficient metals removal from waste pickling liquor using novel task specific ionic liquids-classical manner and encapsulation in polymer shell

Karolina Wieszczycka et al.

Summary: In this study, EH4IA and its quaternary salts were tested as selective extractants for Zn(II) from waste pickling liquor and as sorbents after encapsulation, enabling separation of Fe(II) and (III), Zn(II), and Pb(II). Various factors affecting zinc(II) extraction and its separation from Fe(II) were analyzed, proposing a scheme for waste pickling liquor treatment; the laboratory tests confirmed the high potential of the EH4IA-Br extractant in the extraction and sorption stages.

SEPARATION AND PURIFICATION TECHNOLOGY (2021)

Article Engineering, Chemical

Unique extraction of U(VI), Pu(IV), Am(III) and Eu(III) from nitric acid medium using a phosphonium based ionic liquid consisting of novel anion, 1,1,1,5,5,5-hexafluoro-2,4-pentanedionate - Dual solvent behavior

Huazhong Liu et al.

Summary: A novel phosphonium-based ionic liquid with a unique anion was synthesized and characterized, demonstrating efficient solvent extraction behavior for U(VI), Pu(IV), Am(III) and Eu(III). The solvent showed reusability after regeneration and successful stripping of loaded elements using a complex mixture.

SEPARATION AND PURIFICATION TECHNOLOGY (2021)

Article Engineering, Environmental

A novel electrocatalytic filtration system with carbon nanotube supported nanoscale zerovalent copper toward ultrafast oxidation of organic pollutants

Wentian Zheng et al.

Summary: An integrated electrochemical filtration system was designed in this study for catalytic activation of PMS and degradation of aqueous microcontaminants. The system showed superior activity in degrading a wide array of persistent organic contaminants across various conditions, providing a green strategy for the remediation of organic pollution.

WATER RESEARCH (2021)

Article Multidisciplinary Sciences

Biological treatment of hazardous heavy metals by Streptomyces rochei ANH for sustainable water management in agriculture

Amira M. Hamdan et al.

Summary: Marine actinomycetes isolated from the Alexandrian Mediterranean Seacoast in Egypt showed high metal resistance capability and potential for effective remediation of heavy metals-contaminated industrial effluents. By optimizing adsorption conditions, the biosorption efficiency of actinomycetes for Cr6+ can be significantly improved.

SCIENTIFIC REPORTS (2021)

Review Polymer Science

Polymeric Materials Used for Immobilisation of Bacteria for the Bioremediation of Contaminants in Water

Dmitriy Berillo et al.

Summary: Bioremediation is a crucial process for reclaiming polluted soil and water by using biological agents to neutralise or remove harmful pollutants. Immobilised microorganisms are commonly used in this method, with materials such as activated carbon and agricultural waste being acceptable substrates. Macroporous cryogels show promise in applications for water treatment and biotechnology.

POLYMERS (2021)

Article Environmental Sciences

Efficient Removal of Antimony(III) in Aqueous Phase by Nano-Fe3O4 Modified High-Iron Red Mud: Study on Its Performance and Mechanism

Yizhe Peng et al.

Summary: A novel nano-Fe3O4 modified high-iron red mud material was fabricated to remove Sb(III) from water, showing excellent adsorption performance and high selectivity. The synthesized adsorbent had superior Sb(III) adsorption capacity and specific surface area compared to others, remaining stable in various environmental conditions. Mechanism analysis indicated a major role of complexation reaction in Sb(III) adsorption by the adsorbent, providing an effective method for wastewater treatment and red mud reclamation.
Review Engineering, Environmental

Recent progress on fabrication and application of electrospun nanofibrous photocatalytic membranes for wastewater treatment: A review

Atikah Mohd Nasir et al.

Summary: Photocatalytic degradation has become an attractive and efficient technology for water and wastewater treatment, but challenges such as difficulty in separating suspended photocatalysts from aqueous systems and low reutilization rates need to be addressed for independent implementation in wastewater treatment.

JOURNAL OF WATER PROCESS ENGINEERING (2021)

Review Engineering, Environmental

A review of the production process of bacteria-based polymeric flocculants

Siti Nur Hatika Abu Bakar et al.

Summary: The use of chemical flocculants in water and wastewater treatment has raised concerns due to its potential toxicity and environmental impact. In response, bioflocculants have emerged as a promising alternative, offering biodegradable, eco-friendly, and safe solutions. The identification and production of novel bioflocculants, particularly those derived from bacteria, have gained significant attention worldwide. Extraction and purification techniques in bioflocculant production are crucial in determining production yield, with various methods such as solvent extraction and lyophilisation being commonly used. The development of bioflocculants represents a significant advancement in sustainable environmental technology, with future research needed to enhance extraction and purification techniques for broader application in water and wastewater treatment.

JOURNAL OF WATER PROCESS ENGINEERING (2021)

Article Biotechnology & Applied Microbiology

Heavy metal water pollution: A fresh look about hazards, novel and conventional remediation methods

Camilo Zamora-Ledezma et al.

Summary: The article discusses the causes of water pollution, the potential risks of heavy metal contamination to the environment and human health, and the technologies and materials available for purifying water sources. It highlights the human activities as the main source of heavy metals, the health hazards posed by them, and various detection and removal methods.

ENVIRONMENTAL TECHNOLOGY & INNOVATION (2021)

Article Agricultural Engineering

Efficient absorptive removal of Cd(II) in aqueous solution by biochar derived from sewage sludge and calcium sulfate

Liheng Liu et al.

Summary: The study found that biochar derived from co-pyrolysis of sewage sludge and calcium sulfate had good adsorption efficiency for Cd(II) in aqueous solution. The adsorption process was a multi-layer process dominated by chemisorption, with an increasing contribution from physisorption as the initial Cd(II) concentration increased. The Cd(II) removal process was divided into three stages, ultimately reaching dynamic equilibrium.

BIORESOURCE TECHNOLOGY (2021)

Review Agricultural Engineering

Polyhydroxyalkanoate (PHA) production via resource recovery from industrial waste streams: A review of techniques and perspectives

Laura De Donno Novelli et al.

Summary: The global issue of waste generation in the form of wastewater and solid wastes requires the development of sustainable treatment and resource recovery technologies. Researchers and process industries are interested in the value-added production of PHAs from industrial waste streams. By utilizing mixed microbial communities and carbon recovery techniques, PHA production could be more widely spread at the industrial scale.

BIORESOURCE TECHNOLOGY (2021)

Article Microbiology

Bioleaching of copper and nickel from mobile phone printed circuit board using Aspergillus fumigatus A2DS

Falguni Patel et al.

Summary: The fungal strain Aspergillus fumigatus A2DS was used to recover metals from electronic waste, showing efficient leaching of copper and nickel while exhibiting metal absorption and adsorption abilities. The study confirmed the acidolysis property of the strain and highlighted its potential for bioleaching Cu and Ni from electronic waste.

BRAZILIAN JOURNAL OF MICROBIOLOGY (2021)

Article Chemistry, Applied

Magnetic flocculation of Cu(II) wastewater by chitosan-based magnetic composite flocculants with recyclable properties

Yongjun Sun et al.

Summary: This study investigated the structure, performance, and flocculation process of three magnetic flocculants, with MC-g-PAA showing larger floc size and fractal dimension. The results also demonstrated that under certain conditions, MC-g-PAA achieved maximum floc size and fractal dimension values.

CARBOHYDRATE POLYMERS (2021)

Article Materials Science, Paper & Wood

Ultra-efficient adsorption of copper ions in chitosan-montmorillonite composite aerogel at wastewater treatment

Xin Ye et al.

Summary: The study focuses on the preparation of modified montmorillonite-based aerogel, demonstrating its excellent water treatment performance. The new aerogel efficiently adsorbs copper ions in wastewater, with short adsorption equilibrium time, high removal rate, large maximum adsorption capacity, and good recycling performance.

CELLULOSE (2021)

Article Engineering, Environmental

Feasible route for the recovery of strategic metals from mixed lithium-ion batteries cathode materials by precipitation and carbonation

Shuai Gu et al.

Summary: The study compared three different scenarios for LIBs recycling, and the results indicate that a profit-oriented strategic metals recovery process is more reasonable for LIBs recycling.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Geochemistry & Geophysics

Antimonite oxidation and adsorption onto two tunnel-structured manganese oxides: Implications for antimony mobility

Xiangqin Wang et al.

Summary: Manganese oxides, such as pyrolusite and manganite, have high oxidation and sorption capacities, important for antimony migration and transformation. Sb(III) and Sb(V) showed different affinities towards the two Mn oxides, depending on pH and mineral characteristics. Acidic pH favored sorption of both Sb species, with gamma-MnOOH demonstrating higher capacity than beta-MnO2.

CHEMICAL GEOLOGY (2021)

Article Environmental Sciences

Biosorbent derived from coffee husk for efficient removal of toxic heavy metals from wastewater

Vu Thi Quyen et al.

Summary: The study demonstrates that coffee husk can be used as an adsorbent to remove heavy metal ions from wastewater, with the prepared biosorbents showing high sorption capacities. The adsorption process follows the Freundlich isotherm and second-order kinetic model.

CHEMOSPHERE (2021)

Article Environmental Sciences

Enhanced removal of Cr(VI) via in-situ synergistic reduction and fixation by polypyrrole/sugarcane bagasse composites

Zixin Chen et al.

Summary: Reduction and recycling of Cr(VI) through PPy/SCB composites offers an effective method for environmental governance. The adsorption behavior of Cr(VI) on PPy/SCB is influenced by factors such as initial pH, contact time, and composition ratio. The pseudo-second-order kinetic model is the most suitable for describing the adsorption kinetics of Cr(VI) on PPy/SCB.

CHEMOSPHERE (2021)

Article Environmental Sciences

CaFu MOF as an efficient adsorbent for simultaneous removal of imidacloprid pesticide and cadmium ions from wastewater

Sandeep Singh et al.

Summary: Research has shown that using metal organic frameworks for the adsorptive removal of imidacloprid pesticide and cadmium ions from contaminated water has been effective, with adsorption capacities of 467.23 and 781.2 mg g(-1) respectively. The adsorbed pollutants can be desorbed using dilute hydrochloric acid, allowing the material to be reused for multiple cycles without significant loss.

CHEMOSPHERE (2021)

Article Environmental Sciences

Simultaneous decontamination of arsenite and antimonite using an electrochemical CNT filter functionalized with nanoscale goethite

Xuemei Hu et al.

Summary: A dual-functional electro-chemical filter was designed for one-step detoxification and sequestration of highly toxic As(III) and Sb(III) in water bodies. Results showed high removal efficiency under optimized conditions across a wide pH range. The technology demonstrated synergistic effects of flow-through design, exposed sorption sites, electrochemical reactivity, and nanoscale goethite.

CHEMOSPHERE (2021)

Article Environmental Sciences

Ascorbic acid enhanced ciprofloxacin degradation with nanoscale zero-valent copper activated molecular oxygen

Kejia Zhang et al.

Summary: The study introduced ascorbic acid in the ZVC/air process to efficiently activate molecular oxygen and generate reactive oxygen species for the destruction of ciprofloxacin. The optimal dosages of nZVC and AA were determined to be 0.2 g/L and 1 mM, respectively, allowing the process to operate effectively in a broad pH range of 3.0-7.0.

CHEMOSPHERE (2021)

Article Environmental Sciences

Fabrication of zinc doped aluminium oxide/polysulfone mixed matrix membranes for enhanced antifouling property and heavy metal removal

Prajwal Sherugar et al.

Summary: This study demonstrates the preparation of mixed matrix membranes by incorporating Zinc doped Aluminium Oxide nanoparticles into Polysulfone for efficient removal of heavy metals from water. The membranes showed enhanced hydrophilicity, surface charge, and porosity, enabling efficient removal of arsenic and lead with high efficiencies. Additionally, the membranes exhibited good antifouling properties and reusability for multiple cycles. The rational design of these novel membranes allows for efficient removal of heavy metals.

CHEMOSPHERE (2021)

Article Environmental Sciences

Nano ferric oxide adsorbents with self-acidification effect for efficient adsorption of Sb(V)

Xiuping Feng et al.

Summary: A nano ferric oxide (NFO) adsorbent with self-acidification behavior was synthesized at low temperature for efficient removal of antimony from wastewater. The adsorbent showed high adsorption capacity and kinetic constant due to its larger surface areas and smaller sizes. It has great potential for practical application in treating Sb polluted wastewaters.

CHEMOSPHERE (2021)

Review Environmental Sciences

Electrochemical recovery and high value-added reutilization of heavy metal ions from wastewater: Recent advances and future trends

Liming Yang et al.

Summary: This review discusses recent advances in electrochemical metal recovery techniques, aiming to target recycling heavy metal resources with minimize energy consumption, boost recovery efficiency, and realize commercial application.

ENVIRONMENT INTERNATIONAL (2021)

Article Environmental Sciences

Biomass of the macrophyte remedies and detoxifies Cd(II) and Pb(II) in aqueous solution

Franciele de Freitas et al.

Summary: Aquatic plants, such as Salvinia biloba, show promising potential in removing Cd+2 and Pb+2 ions from contaminated aquatic environments. Kinetic studies reveal that the plant responds differently to metals, while toxicological evaluations indicate a reduction in toxicity after phytoremediation with S. biloba.

ENVIRONMENTAL MONITORING AND ASSESSMENT (2021)

Article Environmental Sciences

Enlightening the characteristics of bioflocculant of endophytic actinomycetes from marine algae and its biosorption of heavy metal removal

Govindan Rajivgandhi et al.

Summary: The study isolated an endophytic actinobacterial species producing bioflocculant from heavy metal contaminated marine environment, which showed excellent flocculating activity and heavy metal sorption capacity, indicating it as an effective alternative method for environmental management in reducing heavy metals.

ENVIRONMENTAL RESEARCH (2021)

Article Environmental Sciences

Thin-film nanocomposite NF membrane with GO on macroporous hollow fiber ceramic substrate for efficient heavy metals removal

Ping Li et al.

Summary: The novel eGO/PA-HFC membrane showed excellent performance in heavy metal removal, with systematic studies indicating great potential for wastewater treatment applications.

ENVIRONMENTAL RESEARCH (2021)

Article Metallurgy & Metallurgical Engineering

Separation of nickel and zinc from aqueous solution using triethylenetetramine

Fatemeh Sadat Hoseinian et al.

Summary: This study investigated the optimal conditions for the combined separation of nickel and zinc ions using Trien and SDS, showing that nickel ion removal is higher than zinc ions, which is opposite to the order of increasing crystal ionic radius.

HYDROMETALLURGY (2021)

Article Engineering, Chemical

Mercury Adsorption on Thiol-Modified Porous Boron Nitride: A Combined Experimental and Theoretical Investigation

Gaoxing Wang et al.

Summary: The study focused on a thiol-modified porous boron nitride adsorbent (pBN-SH) for highly selective Hg(II) adsorption, demonstrating its effectiveness and potential applications through characterization and experiments.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2021)

Article Biotechnology & Applied Microbiology

Rapid removal of thallium from water by a new magnetic nano-composite using graphene oxide for efficient separation

Liangzhong Li et al.

Summary: Thallium contamination is a global concern due to its toxicity and treatment difficulties. In this study, a magnetic adsorbent rGO-Fe3O4@TiO2 was synthesized for the effective removal of thallium(I) from water, showing a fast adsorption rate and high efficiency.

INTERNATIONAL BIODETERIORATION & BIODEGRADATION (2021)

Article Biochemistry & Molecular Biology

Novel synthesis of natural cation exchange resin by crosslinking the sodium alginate as a natural polymer with 1,6-hexamethylene diisocyanate in inert solvents: Characteristics and applications

Refat M. Hassan (El-Moushy)

Summary: A novel synthesis method for natural polymeric cation exchanger from sodium alginate has been developed, showing high binding capacity for removal of toxic heavy metal ions. The resin's binding capacity can be enhanced by adjusting the crosslinking degree, with a specific order of affinity for U(VI), Cu(II), Sr(II), and Ca(II) metal ions. Geometrical configurations for chelation may impact the binding process.

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES (2021)

Article Chemistry, Physical

Strong selectivity and high capacity in the adsorption of As (V) from wastewater by glycine-modified Fe/Cu-layered double hydroxides

Xiaofeng Shi et al.

Summary: A series of glycine modified Fe/Cu LDH (GFC) adsorbents were prepared with high selectivity and adsorption capacity for As (V), following Langmuir isotherms and pseudo-second-order kinetics models. GFC1 showed potential as a candidate for arsenic adsorption from wastewater with high commercial value, despite a slight decrease in adsorption capacity after multiple cycles.

JOURNAL OF ALLOYS AND COMPOUNDS (2021)

Article Polymer Science

Removal behavior and mechanism of silver from low concentration wastewater using cellulose aerogel modified by thiosemicarbazide

Yifan Liu et al.

Summary: A cellulose aerogel modified by thiosemicarbamide (CAT) was successfully fabricated for removing and adsorbing silver ions from low concentration wastewater. CAT exhibited excellent adsorption performance with high removal percentage and capacity for silver ions, fitting a second-order reaction and showing wide adaptability to pH values.

JOURNAL OF APPLIED POLYMER SCIENCE (2021)

Article Biotechnology & Applied Microbiology

Heavy metals bioremediation and water softening using ureolytic strains Metschnikowia pulcherrima and Raoultella planticola

Marwa Eltarahony et al.

Summary: This study successfully removed lead and mercury using fungal and bacterial strains with high ureolytic activity, and characterized the precipitates using EDX, SEM and XRD, achieving detoxification and sequestration of heavy metals.

JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY (2021)

Article Green & Sustainable Science & Technology

Lead and cadmium clean removal from wastewater by sustainable biochar derived from poplar saw dust

Song Cheng et al.

Summary: Biochar produced from pyrolysis of poplar saw dust is used as a sustainable adsorbent for investigating the adsorption of Pb2+/Cd2+ from wastewater. The adsorption of Cd2+ is inhibited in different water systems, while the uptake of Pb2+ remains unaffected. Mineral precipitation and coordination with 7C electrons are identified as the main mechanisms for Pb2+ and Cd2+ adsorption, respectively.

JOURNAL OF CLEANER PRODUCTION (2021)

Article Green & Sustainable Science & Technology

Synthesis of a novel three-dimensional porous carbon material and its highly selective Cr(VI) removal in wastewater

Hongxu Liang et al.

Summary: A novel 3D porous carbon material was prepared for the removal of Cr(VI) pollution in water, with analysis showing its superior adsorption capacity and mechanisms. The material showed excellent selectivity and regenerative performance, with low manufacturing cost, making it an effective and sustainable solution for Cr(VI) removal.

JOURNAL OF CLEANER PRODUCTION (2021)

Article Chemistry, Physical

Insight the roles of loosely-bound and tightly-bound extracellular polymeric substances on Cu2+, Zn2+ and Pb2+ biosorption process with Desulfovibrio vulgaris

Sihui Lu et al.

Summary: This study explored the fate and mechanism of metal cations biosorption in the Desulfovibrio vulgaris system, finding that EPS (including TB-EPS and LB-EPS) played a greater role in adsorption compared to bacterial cells. The adsorption capacity of Pb2+ on EPS was greater than that of Cu2+ and Zn2+, and the adsorption process was dominated by complexation and electrostatic interaction. The findings provide valuable information on the interactions between Desulfovibrio vulgaris and its secreted EPS with metal cations.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2021)

Article Environmental Sciences

Research trends of heavy metal removal from aqueous environments

Morteza Nazaripour et al.

Summary: Heavy metals pose a threat to human health, with China leading in research in this field. Adsorption is the predominant method being studied for removing toxic substances from water environments.

JOURNAL OF ENVIRONMENTAL MANAGEMENT (2021)

Review Environmental Sciences

A survey on experiences in leachate treatment: Common practices, differences worldwide and future perspectives

Yuri Abner Rocha Lebron et al.

Summary: Landfill leachate treatment is essential to reduce environmental impact, especially in tropical regions which require technologies capable of treating highly refractory leachates. Full-scale facilities adopt integrated routes combining biological and physicochemical processes, with membrane separation process as a key step for effective leachate disposal.

JOURNAL OF ENVIRONMENTAL MANAGEMENT (2021)

Article Environmental Sciences

Production of magnetic sodium alginate polyelectrolyte nanospheres for lead ions removal from wastewater

Jue Wang et al.

Summary: The magnetic polyelectrolyte composite nanospheres SA@AM exhibit high adsorption capacity and regeneration performance for the removal of heavy metal pollutants, providing useful information for the production of eco-friendly magnetic nano scale adsorption materials for environmental remediation applications.

JOURNAL OF ENVIRONMENTAL MANAGEMENT (2021)

Article Environmental Sciences

Removal of Ni(II) from strongly acidic wastewater by chelating precipitation and recovery of NiO from the precipitates

Xin Yang et al.

Summary: In this study, Ni(II) precipitation from strongly acidic wastewater using DDTC as the precipitant was evaluated. The results showed that high Ni(II) removal efficiency can be achieved under optimized conditions. Further experiments demonstrated that high-purity NiO can be obtained through the calcination of DDTC-Ni precipitates, achieving efficient nickel recovery.

JOURNAL OF ENVIRONMENTAL SCIENCES (2021)

Article Engineering, Environmental

Sulfite-assisted oxidation/adsorption coupled with a TiO2 supported CuO composite for rapid arsenic removal: Performance and mechanistic studies

Wei Ding et al.

Summary: The combination of Cu-TiO2 material with sulfite is an effective method for removing As(III) from water. This process, which combines oxidation with adsorption, is superior to the traditional preoxidation-adsorption method in arsenic removal.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Engineering, Environmental

Simultaneous removal of calcium, fluoride, nickel, and nitrate using microbial induced calcium precipitation in a biological immobilization reactor

Jiaran Liu et al.

Summary: This study established an immobilized biofilm reactor for the simultaneous removal of calcium, fluoride, nickel, and nitrate by microbial induced calcium precipitation. By analyzing reactor operating parameters and component precipitates, it demonstrated effective removal of targeted substances from water bodies. High-throughput sequencing identified Acinetobacter sp. H-12 as the dominant bacterial group involved in the process.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Engineering, Environmental

Nano nickel embedded in N-doped CNTs-supported porous biochar for adsorption-reduction of hexavalent chromium

Danchen Zhu et al.

Summary: The synthesized Ni@N-K-C material showed high removal capacity for Cr(VI) and strong ability to reduce it to Cr(III). The KOH activation treatment improved the pore structure of the material, promoted the doping of Ni and N, increased specific surface area, and accelerated mass diffusion rates.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Engineering, Environmental

Continuous and efficient immobilization of heavy metals by phosphate-mineralized bacterial consortium

Kejing Zhang et al.

Summary: Lysinibacillus can immobilize heavy metals to form stable phosphate minerals; the bacterial consortium has the ability of self-regulating pH and automatic solid-liquid separation; mechanism analysis through various analytical methods revealed the removal process of Pb(II).

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Chemistry, Physical

Synthesis of hierarchical micro-mesoporous LDH/MOF nanocomposite with in situ growth of UiO-66-(NH2)2 MOF on the functionalized NiCo-LDH ultrathin sheets and its application for thallium (I) removal

Yan Cao et al.

Summary: In this study, a nanocomposite of functionalized layered double hydroxide/metal-organic framework (LDH/MOF) with bimodal micro-mesoporous architecture was successfully prepared for efficient removal of thallium ions from aqueous environments. The synthesized LDH/MOF NC exhibited endothermic and spontaneous adsorption behavior towards thallium, with a physicochemical adsorption nature involving an enhancement of randomness at the solid/liquid interface with increasing temperature. Additionally, regeneration studies demonstrated acceptable reusability of the LDH/MOF NC particles in four cycles.

JOURNAL OF MOLECULAR LIQUIDS (2021)

Article Chemistry, Physical

Recovery of zinc and manganese from black mass of waste Zn-MnO2 alkaline batteries by solvent extraction technique with ionic liquids, DESs and organophosphorous-based acids

Aneta Lukomska et al.

Summary: Solvent extraction was used to recover zinc and manganese from the black mass produced in the zinc plant in Poland, with various extracting solvents investigated. An environmentally friendly method of metal ions extraction was proposed, achieving efficient recovery.

JOURNAL OF MOLECULAR LIQUIDS (2021)

Article Engineering, Chemical

Recovery of Zn(II), Mn(II) and Co(II) from the zinc plant residue using the solvent extraction with CYANEX 302 and D2EHPA/TBP: Stoichiometry and structural studies

Omid Seyed Mehdi Kani et al.

Summary: Zinc plant residues are processed to separate pure zinc, manganese, and cobalt using a solvent extraction method. The probable extracted species of zinc and manganese from the organic phase were determined based on experimental results.

MINERALS ENGINEERING (2021)

Article Engineering, Chemical

Decoration of serpentine with iron ore as an efficient low-cost magnetic adsorbent for Cr (VI) removal from tannery wastewater

Mohsen M. Farahat et al.

Summary: In this study, a dry particle-particle coating technique was used to develop a magnetic adsorbent from natural mineral constituents, showing excellent removal performance for hexavalent chromium Cr(VI) as well as other heavy metals and organic contaminants. The synthesized composite displayed a maximum adsorption capacity of 138 mg/g and followed 1.2-order kinetics for Cr(VI) adsorption, with an exothermic nature. The composite (BIF@Serp) exhibited spontaneous adsorption behavior and was effective in treating real tannery effluent.

POWDER TECHNOLOGY (2021)

Review Environmental Sciences

Engineered algal biochar for contaminant remediation and electrochemical applications

Asha Singh et al.

Summary: Biochar, derived from carbon-rich biomass through pyrolysis in an oxygen-limited environment, plays a crucial role in carbon sequestration, soil fertility enhancement, and environmental remediation. Engineered biochars have emerged by modifying the surface properties of pristine biochar to improve its adsorption capacity. Researchers have increasingly focused on low-cost biomass sources, with algal biomass showing significant promise for biochar fabrication.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Environmental Sciences

Soluble microbial products from the white-rot fungus Phanerochaete chrysosporium as the bioflocculant for municipal wastewater treatment

Ning-Jie Li et al.

Summary: The study shows that SMP produced by fungi has great potential as an efficient bioflocculant in wastewater treatment; SMP-P contains high molecular weight polysaccharides as the main active component, demonstrating good flocculation effects; Using SMP-P as a bioflocculant achieved effective removal of chemical oxygen demand in municipal wastewater treatment.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Environmental Sciences

Highly efficient removal of As(III) by Fe-Mn-Ca composites with the synergistic effect of oxidation and adsorption

Chao Liu et al.

Summary: The synthesized Fe-Mn-Ca composites show excellent adsorption performance for high concentrations of As(III)-contaminated water, with the presence of a higher ratio of Ca component leading to larger specific surface area and better removal efficiency. EDTA-conjugated Fe-Mn-Ca composite adsorbents exhibit enhanced affinity for As(III) over As(V) in high ionic strength water. This promising adsorbent offers outstanding characteristics for treating high-concentration arsenic wastewater in practical industrial applications.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Environmental Sciences

Environmentally friendly fabrication of new β-Cyclodextrin/ZrO2 nanocomposite for simultaneous removal of Pb(II) and BPA from water

Muhammad Usman et al.

Summary: A beta-Cyclodextrin/ZrO2 nanocomposite adsorbent was successfully fabricated for the simultaneous uptake of Pb(II) and Bisphenol A from wastewater. The adsorbent showed efficient removal performance with different adsorption mechanisms, enabling the simultaneous removal of the contaminants. Moreover, the adsorbed pollutants could be successfully recovered with only a slight decline in the nanocomposite's removal performance even after multiple cycles.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Engineering, Chemical

Flocculation of heavy metal by functionalized starch-based bioflocculants: Characterization and process evaluation

Xuefeng Xiao et al.

Summary: Two bioflocculants, SAA and SAS, were designed for the flocculation-chelation of heavy metals. Physicochemical characterization confirmed successful polymer synthesis. SAS, with its sulfonate structure, showed improved flocculation efficiency, and both SAA and SAS exhibited high selectivity for Cu(II).

SEPARATION AND PURIFICATION TECHNOLOGY (2021)

Article Engineering, Chemical

Enhanced oxidative and adsorptive removal of thallium(I) using Fe3O4@TiO2 decorated RGO nanosheets as persulfate activator and adsorbent

Liangzhong Li et al.

Summary: In this study, Fe3O4@TiO2 decorated reduced graphene oxide (RGO) nanosheets were synthesized for the efficient removal of thallium (Tl) ions through the activation of persulfate (PS), rapid oxidation, surface precipitation, and enhanced adsorption mechanisms. The material showed high removal efficiency and capacity under certain conditions, making it a promising approach for Tl(I) removal from water.

SEPARATION AND PURIFICATION TECHNOLOGY (2021)

Article Engineering, Chemical

Metal sulfide precipitation coupled with membrane filtration process for recovering copper from acid mine drainage

Katherine Menzel et al.

Summary: The study introduces a novel method to enhance copper recovery from AMD through a combination of metal sulfide precipitation and membrane microfiltration process.

SEPARATION AND PURIFICATION TECHNOLOGY (2021)

Article Engineering, Chemical

Highly efficient and selective solvent extraction of zirconium and hafnium from chloride acid solution including amic acid extractant

Shuai Ma et al.

Summary: This study presents a novel strategy for separating zirconium ions and hafnium ions using solvent extraction with D2EHDGAA in HCl solution, showing promising application prospects in industry with efficient and selective extraction performance.

SEPARATION AND PURIFICATION TECHNOLOGY (2021)

Article Environmental Sciences

Microbially Induced Carbonate Precipitation Techniques for the Remediation of Heavy Metal and Trace Element-Polluted Soils and Water

Xue Chen et al.

Summary: This study reviews the mechanisms and factors of microbial induced carbonate precipitation (MICP) for the remediation of heavy metals, and presents the challenges and current knowledge gap in applying MICP for remediation of polluted soils and water.

WATER AIR AND SOIL POLLUTION (2021)

Article Multidisciplinary Sciences

Phytoremediation of electroplating wastewater by vetiver grass (Chrysopogon zizanoides L.)

Andhika Puspito Nugroho et al.

Summary: This study evaluates the uptake and elimination rate of heavy metals by vetiver on metal-polluted water. Results show vetiver can effectively remove Cr and Ni from contaminated water, with high uptake rates and BCF, BAC, and TF values indicating phytoextraction and phytostabilization. Vetiver shows promise as a phytoremediation agent for electroplating wastewater treatment.

SCIENTIFIC REPORTS (2021)

Article Multidisciplinary Sciences

Removal of hexavalent chromium from wastewater by Cu/Fe bimetallic nanoparticles

Jien Ye et al.

Summary: The study found that loading Cu onto bimetallic nanoparticles can significantly enhance the removal efficiency of Cr(VI), with the optimal Cu loading rate being 3%. The removal efficiency of Cr(VI) decreased with increasing initial pH and Cr(VI) concentration, and thermodynamic analysis showed that the process is spontaneous and endothermic.

SCIENTIFIC REPORTS (2021)

Article Multidisciplinary Sciences

Highly efficient removal of Sb(V) from water by franklinite-containing nano-FeZn composites

Huiqing Wu et al.

Summary: A novel graphene nano iron zinc photocatalyst (rGO/NZV-FeZn) was prepared via hydrothermal method followed by ultrasonication for efficient removal of pentavalent antimony in water. Among the materials tested, NZV-FeZn exhibited the best performance in Sb(V) removal. Practical decontamination tests showed a removal efficiency of 99.38% for a reaction column filled with rGO/NZV-FeZn.

SCIENTIFIC REPORTS (2021)

Article Chemistry, Multidisciplinary

Ultimate Resourcization of Waste: Crab Shell-Derived Biochar for Antimony Removal and Sequential Utilization as an Anode for a Li-Ion Battery

Xinyue Zhang et al.

Summary: The Fe-La-doped biomass carbon adsorbent Cs/Fe-La showed excellent adsorption behavior for both Sb(III) and Sb(V) at 40 degrees C with a maximum capacity of 498 and 337 mg/g, respectively. The antimony adsorption mechanism and the contribution of Cs/Fe-La composition to high capacity were analyzed based on physicochemical characterization and adsorption studies, with the pseudo-second-order kinetic model and Langmuir model fitting the results well.

ACS SUSTAINABLE CHEMISTRY & ENGINEERING (2021)

Review Microbiology

A Critical Review of Resistance and Oxidation Mechanisms of Sb-Oxidizing Bacteria for the Bioremediation of Sb(III) Pollution

Renjian Deng et al.

Summary: This paper reviews the characteristics and potential applications of antimony-oxidizing bacteria, aiming to provide a theoretical basis and reference for the prevention and environmental treatment of antimony pollution.

FRONTIERS IN MICROBIOLOGY (2021)

Article Chemistry, Physical

Evaluation of Cr(VI) Reduction Using Indigenous Bacterial Consortium Isolated from a Municipal Wastewater Sludge: Batch and Kinetic Studies

Buyisile Kholisa et al.

Summary: This study isolated and identified a microbial consortium culture from sludge in a wastewater treatment plant, showing strong reduction capability for Cr(VI) and high removal efficiency under various operational conditions. The results demonstrated the potential of using bacteria for hexavalent chromium remediation in contaminated sites.

CATALYSTS (2021)

Article Geochemistry & Geophysics

Metal Extraction and Recovery from Mobile Phone PCBs by a Combination of Bioleaching and Precipitation Processes

Arrate Santaolalla et al.

Summary: The study focuses on recovering metals from mobile phone PCBs through a combined process. The effects of ferric iron and sulfuric acid on the leaching processes for copper and nickel were significant, with the combination of two precipitants effectively removing metals from the leachate.

MINERALS (2021)

Article Biotechnology & Applied Microbiology

Selective fungal bioprecipitation of cobalt and nickel for multiple-product metal recovery

John Ferrier et al.

Summary: Novel, economical, and efficient metal processing technologies are needed to improve the sustainability of critical metals, such as cobalt and nickel, which are extensively used in low-carbon energy technologies. Fungal metal biorecovery processes show potential in selectively recovering cobalt and nickel oxalates and phosphates from spent Aspergillus niger culture filtrate. Selective precipitation at different pH levels resulted in high recovery rates for both cobalt and nickel, with the potential for industrial significance.

MICROBIAL BIOTECHNOLOGY (2021)

Article Chemistry, Multidisciplinary

Anaerobic As(III) Oxidation Coupled with Nitrate Reduction and Attenuation of Dissolved Arsenic by Noviherbaspirillum Species

Yi-Fei Wu et al.

Summary: The bacterium strain HC18 belonging to the genus Noviherbaspirillum was found to oxidize both As(III) and Fe(II) under anoxic nitrate-reducing conditions. However, it was unable to oxidize As(III) to As(V) under oxic conditions. This bacterium shows potential for bioremediation of arsenic-contaminated environments.

ACS EARTH AND SPACE CHEMISTRY (2021)

Article Materials Science, Multidisciplinary

Design and fabrication of micro/nano-motors for environmental and sensing applications

Heng Ye et al.

Summary: Small-scale synthetic micro/nano-motors (MNMs) play a leading role in scientific and technological development, offering solutions to environmental remediation and analytical chemistry issues. These innovative tools provide improved remediation performance compared to conventional methods, with self-motile platforms and motion-based analytical platforms enhancing mass transfer and analysis effectiveness.

APPLIED MATERIALS TODAY (2021)

Article Environmental Sciences

Recent Advances on Coagulation-Based Treatment of Wastewater: Transition from Chemical to Natural Coagulant

Muhammad Burhanuddin Bahrodin et al.

Summary: The use of conventional chemical coagulants in treating wastewater has raised concerns due to the negative impacts on human health and the environment. Transitioning to natural coagulants has been suggested as a strategy to mitigate these drawbacks, with research showing comparable or even better performance. However, further research is needed to address key aspects such as active coagulant agents, extraction, and optimization for different wastewater characteristics in order to fully realize the potential of natural coagulants for sustainable wastewater treatment.

CURRENT POLLUTION REPORTS (2021)

Article Engineering, Environmental

Chemical precipitation enabled UF and MF filtration for lead removal

Zitong Xu et al.

Summary: The study investigated the removal of Pb2+ ions by chemical precipitation enabled membrane filtration (CPEMF) using microfiltration (MF) and ultrafiltration (UF) membranes. Optimal conditions of 1 mM DIC and pH 8.5 were found to bring the permeate lead level below the drinking water standard, demonstrating the effectiveness of CPEMF in removing lead ions from water.

JOURNAL OF WATER PROCESS ENGINEERING (2021)

Review Engineering, Environmental

Natural flocculants for the treatment of wastewaters containing dyes or heavy metals: A state-of-the-art review

Jamila El-Gaayda et al.

Summary: This review provides insights into the recent developments in natural flocculants for the removal of dyes or heavy metals from aqueous solutions. It covers the types, characteristics, toxicity, performances, and mechanisms of natural flocculants, as well as their economic analysis and future prospects. Conducting more in-depth scientific research on natural flocculants has the potential to enhance global water security in the long term.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

Article Engineering, Environmental

Recovery of Rare Earth Elements from acidic mine waters by integration of a selective chelating ion-exchanger and a solvent impregnated resin

M. Hermassi et al.

Summary: A polymeric ion-exchange resin and a solvent impregnated resin were evaluated for the selective separation of Rare Earth Elements from various elements in acidic mine waters. The resins showed good separation factors through acidity control and the TP272 resin exhibited higher affinity towards Heavy REE. The integration of both resins could be used to recover REE as secondary resources for the clean energy technology industry.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

Article Engineering, Environmental

Simultaneous removal of multiple heavy metals from wastewater by novel plateau laterite ceramic in batch and fixed-bed studies

Dirui Zhu et al.

Summary: In this study, a unique plateau laterite ceramic was used to simultaneously adsorb six heavy metals from wastewater with high efficiency and reusability, showing great potential for practical application in removing multiple heavy metal pollutants from wastewater.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

Article Engineering, Environmental

Simultaneous adsorption of methylene blue and heavy metals from water using Zr-MOF having free carboxylic group

Madhu N. Nimbalkar et al.

Summary: This study utilizes zirconium based metal-organic framework for adsorptive removal of methylene blue and heavy metals from water, and confirms its adsorption performance and structural characteristics through various analyses, indicating its potential application prospects in water treatment.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

Article Engineering, Environmental

Bioprecipitation facilitates the green synthesis of sulfidated nanoscale zero-valent iron particles for highly selective dechlorination of trichloroethene

Jingjing Zhan et al.

Summary: A biological precipitation method was developed to prepare S-nZVI with the in situ formation of ferrous disulfide on the surface of nZVI by sulfate-reducing bacteria. The obtained BP-S-nZVI particles showed excellent performance in TCE degradation without the need for harmful chemical sulfidating agents, making the preparation process more environmentally friendly.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

Article Engineering, Environmental

Concurrent removal of Cu(II), Co(II) and Ni(II) from wastewater by nanostructured layered sodium vanadosilicate: Competitive adsorption kinetics and mechanisms

Xiaoyuan Zhang et al.

Summary: In this study, a novel nanostructured layered sodium vanadosilicate adsorbent was synthesized for the concurrent removal of Cu2+, Ni2+, and Co2+ from wastewater in a ternary system. The adsorption equilibrium was reached within 30 minutes, indicating fast adsorption kinetics, with Cu2+ showing the highest affinity among the three ions.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

Review Engineering, Environmental

Nanocomposite polymeric membrane a new trend of water and wastewater treatment: A short review

Santanu Sarkar et al.

Summary: This article discusses the application of nanocomposite membranes in water and wastewater treatment, aiming to eliminate limitations in traditional membrane treatment processes, improve membrane performance, and effectiveness through surface modification and the selection of different types of nanoparticles.

GROUNDWATER FOR SUSTAINABLE DEVELOPMENT (2021)

Article Engineering, Environmental

Experimental study on the performance of modified flocculant (PEI-T) for removal of turbidity and heavy metals from aqueous solution

Wang Jin-xi et al.

Summary: The study focused on evaluating a modified flocculant (PEI-T) for removing turbidity and heavy metals from wastewater. Results showed that PEI-T had good capabilities in catching heavy metals like copper and mercury, and when Cu2+ and turbidity-causing substances are present together, they can promote each other's removal. Additionally, the presence of Ca2+ and Mg2+ can enhance the removal of copper ions by PEI-T.

WATER SUPPLY (2021)

Article Chemistry, Physical

Ion-pair induced solvent extraction of lithium (I) from acidic chloride solutions with tributyl phosphate

Li Cui et al.

Summary: A new ion pair induced mechanism for selectively extracting Li+ from acidic chloride solutions by tributyl phosphate (TBP) is reported in this study. The formed ion-pair complex in the organic phase effectively extracts Li+ from the aqueous phase. The understanding of this ion-pair transport mechanism could help optimize the recovery process for lithium from acidic liquor.

GREEN ENERGY & ENVIRONMENT (2021)

Article Engineering, Environmental

Removing heavy metals from landfill leachate using electrospun polyelectrolyte fiber mat-laminated ultrafiltration membrane

Amirsalar R. Esfahani et al.

Summary: This study found that treatment of heavy metals in landfill leachate using specific membrane materials can enhance removal efficiency, with further enhancement in heavy metal removal achieved through functionalization of the membrane with PAA/PAH-UF, especially in the presence of natural organic matter.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

Article Engineering, Environmental

Palladium adsorption on natural polymeric sericin-alginate particles crosslinked by polyethylene glycol diglycidyl ether

Thiago Lopes da Silva et al.

Summary: This study evaluated the use of particles produced from waste sericin and alginate blend for Pd adsorption, showing high removal rates and better fitting with pseudo-second order rate law. External mass transfer resistance was identified as the limiting step of adsorption, and both chemisorption and physisorption were involved in metal uptake. The adsorbent demonstrated feasibility for Pd removal and recovery with maximum adsorbed capacities at different temperatures.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

Article Engineering, Environmental

Synthesis of value-added materials from the sewage sludge of cosmetics industry effluent treatment plant

Mariany Rhaiany Ribeiro et al.

Summary: Biochar and bio-oil were produced from the sewage sludge of cosmetics industry effluent treatment plant via pyrolysis, with biochar displaying a porous structure and high calorific power, and bio-oil containing fatty acids and alcohols. The use of biochar as an adsorbent for dye removal is an endothermic process, and the material can be reactivated and reused.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

Article Engineering, Environmental

Nanostructured Didymosphenia geminata-based membrane for efficient lead adsorption from aqueous solution

Elias Reinoso-Guerra et al.

Summary: This study introduces a novel nanostructured membrane using a biopolymer from the highly invasive microalgae Didymosphenia geminata as a lead adsorbent, showing high adsorption capacity. The addition of multi-walled carbon nanotubes in the membrane improves the adsorption capacity, while also exploring the anti-fouling and mechanical properties of the Didymo-based membrane.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

Article Engineering, Environmental

Use of phytic acid for selective precipitation of undesirable metals (Al, Fe, Pb) contained in the leachates from hydrometallurgical processes

Julien Comel et al.

Summary: This study investigated the potential of using phytic acid to remove metal ions from acidic leachates, showing that phytic acid could be an interesting alternative precipitation reagent capable, thermodynamically, of removing Al3+, Fe3+, and Pb2+ effectively.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

Article Engineering, Environmental

Hydroponic phytoremediation of paperboard mill wastewater by using vetiver (Chrysopogon zizanioides)

Veeraswamy Davamani et al.

Summary: The study demonstrated that using aerated hydroponically grown vetiver system for treating paperboard mill wastewater can effectively reduce electrical conductivity, total soluble salts, and total dissolved solids, decrease biochemical oxygen demand and chemical oxygen demand, reduce nutrient concentrations, and lower heavy metal concentrations below permissible limits.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

Review Engineering, Chemical

Simultaneous removal of copper and zinc ions by low cost natural snail shell/hydroxyapatite/chitosan composite

Abbas Bambaeero et al.

Summary: In this study, a snail shell/hydroxyapatite/chitosan composite was prepared and used as an adsorbent for the simultaneous sorption of Zn(II) and Cu(II) ions. The experimental data for both ions were best described by the pseudo-second-order model, indicating that the adsorption process was physical and spontaneous.

CHINESE JOURNAL OF CHEMICAL ENGINEERING (2021)

Article Environmental Sciences

Ca-mediated alleviation of Cd2+ induced toxicity and improved Cd2+ biomineralization by Sporosarcina pasteurii

Longyang Fang et al.

Summary: The study found that adding Ca2+ can significantly enhance the resistance of ureolytic bacteria to Cd2+ and improve the removal efficiency of Cd2+. In addition, Ca2+ can also protect ureolytic bacteria from toxicity of other heavy metals.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Review Biotechnology & Applied Microbiology

Recent advances and perspectives in efforts to reduce the production and application cost of microbial flocculants

Cong Liu et al.

Summary: Microbial flocculants, produced by microorganisms, have advantages of being non-toxic, harmless, and biodegradable, but high production cost is a main challenge. Efforts have been made to reduce the cost through various approaches, achieving some progress in the field.

BIORESOURCES AND BIOPROCESSING (2021)

Review Materials Science, Multidisciplinary

Recent advances on the removal of dyes from wastewater using various adsorbents: a critical review

Soumi Dutta et al.

Summary: This review article focuses on the use of different types of adsorbents for the removal of dye pollutants from contaminated water, discussing the impact of key factors on dye adsorption performance and the mechanisms responsible for dye removal.

MATERIALS ADVANCES (2021)

Article Chemistry, Multidisciplinary

Optimization of process conditions for the removal of zinc and lead by ultrafiltration using biopolymer

Kavitha Edward et al.

Summary: The paper proposes a method for removal and recovery of Zn(II) and Pb(II) from industrial effluent using size-enhanced ultrafiltration technique and carboxymethyl chitosan. The study explores experimental design, process parameter optimization, and result analysis.

CHEMICAL PAPERS (2021)

Review Engineering, Environmental

Biosorption and removal of toxic heavy metals by metal tolerating bacteria for bioremediation of metal contamination: A comprehensive review

Monika Priyadarshanee et al.

Summary: Heavy metal pollution caused by industrialization poses a significant public health threat, and conventional remediation methods are expensive and environmentally harmful. Therefore, green technologies utilizing bacteria and other biological agents have garnered more attention due to their cost-effectiveness and high removal efficiency. Bacterial biosorption offers a safe and efficient treatment method for non-biodegradable toxic pollutants like heavy metals, making it a promising approach for heavy metal-contaminated wastewater treatment.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

Article Engineering, Environmental

Equilibrium and desorption studies of the competitive binary biosorption of silver(I) and copper(II) ions on brown algae waste

Welenilton Jose Do Nascimento Junior et al.

Summary: Synthetic samples of Ag(I) and Cu(II) cations were effectively treated with acidified dealginated Sargassum filipendula, showing complex interactions among various adsorption mechanisms and the influence of operation temperature on process selectivity.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

Article Engineering, Environmental

Antifouling nanofiltration membrane via tetrathioterephthalate coating on aniline oligomers-grafted polyethersulfone for efficient dye and heavy metal ion removal

Golshan Moradi et al.

Summary: A novel antifouling nanofiltration membrane has been developed for dye rejection and heavy metal ion removal, with high water flux and excellent fouling resistance.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

Article Chemistry, Multidisciplinary

Fungal remediation of Cd(ii) from wastewater using immobilization techniques

Eman Abdullah M. Ali et al.

Summary: The study aimed at removing Cd(ii) from wastewater using fungal biomass immobilized on loofa sponges or in Ca-alginate beads. The optimal conditions for maximum Cd(ii) sorption capacity were pH 7.0, thirty minutes contact time, and 0.5 mol l(-1) initial Cd(ii) concentration for all sorbents used. Fungal cells immobilized showed enhanced removal of Cd(ii) compared to free cells in real wastewater samples collected from two Egyptian industrial plants.

RSC ADVANCES (2021)

Article Engineering, Environmental

Bacterial Strains Isolated from Heavy Metals Contaminated Soil and Wastewater with Potential to Oxidize Arsenite

Shahid Sher et al.

Summary: The study aims to develop low-cost wastewater treatment systems for efficient removal of toxic heavy metal ions, especially arsenic. Two bacterial strains, IT6 and S12, showed high potential in arsenite oxidation and resistance against multiple metal ions, making them potential candidates for exterminating toxic metal ions from wastewater.

ENVIRONMENTAL PROCESSES-AN INTERNATIONAL JOURNAL (2021)

Review Environmental Studies

Microalgal potential for nutrient-energy-wastewater nexus: Innovations, current trends and future directions

Sandeep Panda et al.

Summary: Conventional activated sludge nutrient removal process is expensive, while microalgal applications offer a cost-effective method for wastewater treatment. Microalgae not only reduce harmful substances like coliform bacteria and heavy metals, but also produce valuable biomass.

ENERGY & ENVIRONMENT (2021)

Article Chemistry, Multidisciplinary

Cr(III)aq separation by flotation with multipolar collector

Maria Gratiela Craioveanu et al.

SEPARATION SCIENCE AND TECHNOLOGY (2020)

Article Environmental Sciences

Bioleaching of heavy metals from spent batteries using Aspergillus nomius JAMK1

A. Chatterjee et al.

INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (2020)

Article Engineering, Environmental

Simultaneous recovery of ammonium, potassium and magnesium from produced water by struvite precipitation

Lei Hu et al.

CHEMICAL ENGINEERING JOURNAL (2020)

Article Engineering, Environmental

Chitosan functionalized iron nanosheet for enhanced removal of As(III) and Sb(III): Synergistic effect and mechanism

Jianqiang Zeng et al.

CHEMICAL ENGINEERING JOURNAL (2020)

Article Chemistry, Physical

Arsenic(V) removal by granular adsorbents made from water treatment residuals materials and chitosan

Huiping Zeng et al.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2020)

Article Chemistry, Multidisciplinary

SOHIO process legacy waste treatment: Uranium recovery using ion exchange

Richard I. Foster et al.

JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY (2020)

Article Biotechnology & Applied Microbiology

Biorecovery of cobalt and nickel using biomass-free culture supernatants from Aspergillus niger

Yuyi Yang et al.

APPLIED MICROBIOLOGY AND BIOTECHNOLOGY (2020)

Review Agricultural Engineering

Recent advances in the recovery of metals from waste through biological processes

Zhengsheng Yu et al.

BIORESOURCE TECHNOLOGY (2020)

Article Engineering, Environmental

Adsorption of Pb2+ and Cu2+ ions on the CS2-modified alkaline lignin

Qiaorui Wang et al.

CHEMICAL ENGINEERING JOURNAL (2020)

Article Biochemistry & Molecular Biology

A novel method for improving laccase activity by immobilization onto copper ferrite nanoparticles for lignin degradation

Kirupa Sankar Muthuvelu et al.

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES (2020)

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Facile modification of nanoscale zero-valent iron with high stability for Cr(VI) remediation

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SCIENCE OF THE TOTAL ENVIRONMENT (2017)

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Recovery of trace Cu2+ using a process of nano-adsorption coupled with flotation: SNP as an adsorbing carrier

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Removal of ferric hydroxide by flotation with micro and nanobubbles

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Ion imprinted cryogels for selective removal of Ni(II) ions from aqueous solutions

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SEPARATION AND PURIFICATION TECHNOLOGY (2017)

Review Engineering, Environmental

Extending the life-cycle of reverse osmosis membranes: A review

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ARABIAN JOURNAL OF CHEMISTRY (2017)

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ACS SUSTAINABLE CHEMISTRY & ENGINEERING (2017)

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Antimony Removal from Aqueous Solution Using Novel α-MnO2 Nanofibers: Equilibrium, Kinetic, and Density Functional Theory Studies

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ACS SUSTAINABLE CHEMISTRY & ENGINEERING (2017)

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Metal and metalloid biorecovery using fungi

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MICROBIAL BIOTECHNOLOGY (2017)

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SCIENTIFIC REPORTS (2017)

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Removal of heavy metal ions from water using ion flotation

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ENVIRONMENTAL TECHNOLOGY & INNOVATION (2017)

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Biorecovery mechanism of palladium as nanoparticles by Enterococcus faecalis: From biosorption to bioreduction

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CHEMICAL ENGINEERING JOURNAL (2017)

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Sustainable use of autoclaved aerated concrete waste to remove low concentration of Cd (II) ions in wastewater

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DESALINATION AND WATER TREATMENT (2017)

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Capacity of '3nopal' pectin as a dual coagulant-flocculant agent for heavy metals removal

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CHEMICAL ENGINEERING JOURNAL (2017)

Article Environmental Sciences

Removal of arsenite by a microbial bioflocculant produced from swine wastewater

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CHEMOSPHERE (2017)

Review Engineering, Environmental

Efficient techniques for the removal of toxic heavy metals from aquatic environment: A review

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JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2017)

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Electrocoagulation treatment of arsenic in wastewaters: A comprehensive review

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CHEMICAL ENGINEERING JOURNAL (2017)

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Application of chelating weak base resin Dowex M4195 to the recovery of uranium from mixed sulfate/chloride media

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CHEMICAL ENGINEERING JOURNAL (2017)

Article Engineering, Environmental

The remarkable effect of the coexisting arsenite and arsenate species ratios on arsenic removal by manganese oxide

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CHEMICAL ENGINEERING JOURNAL (2017)

Review Engineering, Environmental

A review on the adsorption of heavy metals by clay minerals, with special focus on the past decade

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CHEMICAL ENGINEERING JOURNAL (2017)

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Innovative uses of carbamoyl benzoic acids in coagulation-flocculation's processes of wastewater

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CHEMICAL ENGINEERING JOURNAL (2017)

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Phytoremediation potential of Lemna minor L. for heavy metals

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INTERNATIONAL JOURNAL OF PHYTOREMEDIATION (2016)

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Using Fe-Mn binary oxide three-dimensional nanostructure to remove arsenic from aqueous systems

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WATER SCIENCE AND TECHNOLOGY-WATER SUPPLY (2016)

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High-Capacity and Self-Stabilized Manganese Carbonate Microspheres as Anode Material for Lithium-Ion Batteries

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ACS APPLIED MATERIALS & INTERFACES (2016)

Review Biotechnology & Applied Microbiology

Bio-recovery of non-essential heavy metals by intra- and extracellular mechanisms in free-living microorganisms

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BIOTECHNOLOGY ADVANCES (2016)

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Use of nanofiltration to reject cobalt (II) from ammoniacal solutions involved in absorption of SO2/NOx

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CHEMICAL ENGINEERING SCIENCE (2016)

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Antifouling membranes for sustainable water purification: strategies and mechanisms

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CHEMICAL SOCIETY REVIEWS (2016)

Review Environmental Sciences

Immunotoxic effects of environmental pollutants in marine mammals

Jean-Pierre W. Desforges et al.

ENVIRONMENT INTERNATIONAL (2016)

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Recovering Heavy Metal Ions from Complex Solutions Using Polyethylenimine Derivatives Encapsulated in Alginate Matrix

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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2016)

Review Engineering, Chemical

Recent Advancement of Coagulation-Flocculation and Its Application in Wastewater Treatment

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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2016)

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Techno-environmental assessment of integrating polyhydroxyalkanoate (PHA) production with services of municipal wastewater treatment

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JOURNAL OF CLEANER PRODUCTION (2016)

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Removal of textile dyes and metallic ions using polyelectrolytes and macroelectrolytes containing sulfonic acid groups

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JOURNAL OF ENVIRONMENTAL MANAGEMENT (2016)

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Evaluation of rhamnolipid (RL) as a biosurfactant for the removal of chromium from aqueous solutions by precipitate flotation

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JOURNAL OF ENVIRONMENTAL MANAGEMENT (2016)

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Recovery of copper as zero-valent phase and/or copper oxide nanoparticles from wastewater by ferritization

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JOURNAL OF ENVIRONMENTAL MANAGEMENT (2016)

Review Environmental Sciences

Potential use of algae for heavy metal bioremediation, a critical review

Amin Keyvan Zeraatkar et al.

JOURNAL OF ENVIRONMENTAL MANAGEMENT (2016)

Article Engineering, Environmental

Novel thiosalicylate-based ionic liquids for heavy metal extractions

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JOURNAL OF HAZARDOUS MATERIALS (2016)

Article Engineering, Environmental

Simultaneous oxidation and adsorption of As(III) from water by cerium modified chitosan ultrafine nanobiosorbent

Lingfan Zhang et al.

JOURNAL OF HAZARDOUS MATERIALS (2016)

Review Engineering, Environmental

Comprehensive review on phytotechnology: Heavy metals removal by diverse aquatic plants species from wastewater

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JOURNAL OF HAZARDOUS MATERIALS (2016)

Article Engineering, Environmental

pH-dependent degradation of p-nitrophenol by sulfidated nanoscale zerovalent iron under aerobic or anoxic conditions

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JOURNAL OF HAZARDOUS MATERIALS (2016)

Article Chemistry, Multidisciplinary

Activated bentonite as a low-cost adsorbent for the removal of Cu(II) and Pb(II) from aqueous solutions: Batch and column studies

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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY (2016)

Article Chemistry, Multidisciplinary

Biosorption of Pb(II) onto immobilized and native Mangifera indica waste biomass

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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY (2016)

Article Engineering, Chemical

Batch process of polymer-enhanced ultrafiltration to recover mercury (II) from wastewater

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JOURNAL OF MEMBRANE SCIENCE (2016)

Article Chemistry, Physical

Separation and recovery of copper from aqueous solutions using tri-n-butyl phosphate in benzene

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JOURNAL OF MOLECULAR LIQUIDS (2016)

Article Chemistry, Physical

Synthesis, characterization, band gap tuning and applications of Cd-doped ZnS nanoparticles in hybrid solar cells

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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY (2016)

Article Engineering, Chemical

Photoreduction of Pb(II) ions from aqueous solution by titania polyvinylalcohol-alginate beads

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JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS (2016)

Article Engineering, Chemical

Kinetic studies of heavy metals biosorption by acidogenic biomass immobilized in clinoptilolite

G. M. Figueroa-Torres et al.

JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS (2016)

Article Chemistry, Multidisciplinary

Graphene-Based Microbots for Toxic Heavy Metal Removal and Recovery from Water

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NANO LETTERS (2016)

Article Chemistry, Analytical

Enhanced ethanol vapour sensing performances of copper oxide nanocrystals with mixed phases

Oleg Lupan et al.

SENSORS AND ACTUATORS B-CHEMICAL (2016)

Article Engineering, Chemical

Recovery of heavy metal ions and recycle of removal agent in the polymer-surfactant aggregate process

L. C. Shen et al.

SEPARATION AND PURIFICATION TECHNOLOGY (2016)

Article Engineering, Chemical

Treatment of water containing heavy metals using a novel approach of immobilized modified sludge biomass based adsorbents

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SEPARATION AND PURIFICATION TECHNOLOGY (2016)

Article Engineering, Chemical

Removal of heavy metals from water using polyvinylamine by polymer-enhanced ultrafiltration and flocculation

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SEPARATION AND PURIFICATION TECHNOLOGY (2016)

Review Biotechnology & Applied Microbiology

Biological and Bioelectrochemical Recovery of Critical and Scarce Metals

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TRENDS IN BIOTECHNOLOGY (2016)

Review Engineering, Environmental

Application of iron sulfide particles for groundwater and soil remediation: A review

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WATER RESEARCH (2016)

Article Engineering, Environmental

The effects of organic fouling on the removal of radionuclides by reverse osmosis membranes

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WATER RESEARCH (2016)

Review Biotechnology & Applied Microbiology

A comparative review towards potential of microbial cells for heavy metal removal with emphasis on biosorption and bioaccumulation

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WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY (2016)

Review Nanoscience & Nanotechnology

Materials for next-generation desalination and water purification membranes

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NATURE REVIEWS MATERIALS (2016)

Review Engineering, Environmental

A review of technologies for manganese removal from wastewaters

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JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2016)

Article Biochemistry & Molecular Biology

Exposure to Zinc Sulfate Results in Differential Effects on Olfactory Sensory Neuron Subtypes in Adult Zebrafish

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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES (2016)

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Adsorptive removal of arsenic using a novel akhtenskite coated waste goethite

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JOURNAL OF CLEANER PRODUCTION (2015)

Article Chemistry, Physical

Ultrathin willow-like CuO nanoflakes as an efficient catalyst for electro-oxidation of hydrazine

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JOURNAL OF POWER SOURCES (2015)

Review Chemistry, Multidisciplinary

Rational design of nanomaterials for water treatment

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NANOSCALE (2015)

Review Chemistry, Applied

A review of current coupling agents for modification of metal oxide nanoparticles

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PROGRESS IN ORGANIC COATINGS (2015)

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Removal of mercury (II) from wastewater by polyvinylamine-enhanced ultrafiltration

Yifeng Huang et al.

SEPARATION AND PURIFICATION TECHNOLOGY (2015)

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Removal of heavy metal ions from dilute aqueous solutions by polymer-surfactant aggregates: A novel effluent treatment process

Li-Cheng Shen et al.

SEPARATION AND PURIFICATION TECHNOLOGY (2015)

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Magnetically driven Bi2O3/BiOCl-based hybrid microrobots for photocatalytic water remediation

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JOURNAL OF MATERIALS CHEMISTRY A (2015)

Article Engineering, Chemical

Removal of heavy metals from aqueous solution by polyacrylic acid enhanced ultrafiltration

Dorra Jellouli Ennigrou et al.

DESALINATION AND WATER TREATMENT (2015)

Review Environmental Sciences

Regeneration of adsorbents and recovery of heavy metals: a review

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INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (2015)

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Adsorption and Oxidation of Thallium(I) by a Nanosized Manganese Dioxide

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WATER AIR AND SOIL POLLUTION (2015)

Review Chemistry, Multidisciplinary

Nano-Composites for Water Remediation: A Review

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ADVANCED MATERIALS (2014)

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Selective capture of thallium(I) ion from aqueous solutions by amorphous hydrous manganese dioxide

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CHEMICAL ENGINEERING JOURNAL (2014)

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Solvent extraction: the coordination chemistry behind extractive metallurgy

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CHEMICAL SOCIETY REVIEWS (2014)

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Chemical coagulation process for the removal of heavy metals from water: a review

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Desalination and Water Treatment (2014)

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Uranium removal and microbial community in a H2-based membrane biofilm reactor

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WATER RESEARCH (2014)

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Self-Propelled Micromotors for Cleaning Polluted Water

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ACS NANO (2013)

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Magnetite nanoparticles for removal of heavy metals from aqueous solutions: synthesis and characterization

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ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY (2013)

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New Approaches to Functionalizing Metal-Coordinated N2

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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2013)

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PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES (2013)

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Hierarchical CuO nanoflowers: water-required synthesis and their application in a nonenzymatic glucose biosensor

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PHYSICAL CHEMISTRY CHEMICAL PHYSICS (2013)

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Non-enzymatic palladium recovery on microbial and synthetic surfaces

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BIOTECHNOLOGY AND BIOENGINEERING (2012)

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Use of Desulfovibrio and Escherichia coli Pd-nanocatalysts in reduction of Cr(VI) and hydrogenolytic dehalogenation of polychlorinated biphenyls and used transformer oil

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JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY (2012)

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KOREAN JOURNAL OF CHEMICAL ENGINEERING (2012)

Article Chemistry, Physical

CuO-PAA hybrid films: Chemical synthesis and supercapacitor behavior

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APPLIED SURFACE SCIENCE (2011)

Article Engineering, Chemical

Polymer enhanced membrane filtration of metals: retention of single and mixed species of metal ions based on adsorption isotherms

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DESALINATION AND WATER TREATMENT (2011)

Review Environmental Sciences

Removal of heavy metal ions from wastewaters: A review

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JOURNAL OF ENVIRONMENTAL MANAGEMENT (2011)

Article Engineering, Environmental

Nano-scale metallic iron for the treatment of solutions containing multiple inorganic contaminants

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JOURNAL OF HAZARDOUS MATERIALS (2011)

Article Engineering, Environmental

Selective Removal of Cu(II) Ions by Using Cation-exchange Resin-Supported Polyethyleneimine (PEI) Nanoclusters

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ENVIRONMENTAL SCIENCE & TECHNOLOGY (2010)

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Treatment of copper (II)-loaded aqueous nitrate solutions by polymer enhanced ultrafiltration and electrodeposition

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SEPARATION AND PURIFICATION TECHNOLOGY (2010)

Article Agricultural Engineering

Adsorption of toxic mercury(II) by an extracellular biopolymer poly(gamma-glutamic acid)

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BIORESOURCE TECHNOLOGY (2009)

Review Chemistry, Multidisciplinary

Do We Understand the Recyclability of Ionic Liquids?

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CHEMISTRY-A EUROPEAN JOURNAL (2009)

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Use of iron-based technologies in contaminated land and groundwater remediation: A review

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SCIENCE OF THE TOTAL ENVIRONMENT (2008)

Article Engineering, Chemical

Removal of copper and nickel from concentrated ZnSO4 solutions with silica-supported chelating adsorbents

Katri Sirola et al.

SEPARATION AND PURIFICATION TECHNOLOGY (2008)

Article Engineering, Environmental

Heavy metal removal from waste waters by ion flotation

H. Polat et al.

JOURNAL OF HAZARDOUS MATERIALS (2007)

Article Chemistry, Physical

Characterization of zero-valent iron nanoparticles

Yuan-Pang Sun et al.

ADVANCES IN COLLOID AND INTERFACE SCIENCE (2006)

Article Engineering, Chemical

On the kinetics of precipitate flotation of CrIII using sodium dodecylsulfate and ethanol

BY Medina et al.

MINERALS ENGINEERING (2005)

Article Engineering, Chemical

Selective sorption of nickel and cobalt from sulphate solutions using chelating resins

FD Mendes et al.

INTERNATIONAL JOURNAL OF MINERAL PROCESSING (2004)

Review Chemistry, Multidisciplinary

A short history of ionic liquids - from molten salts to neoteric solvents

JS Wilkes

GREEN CHEMISTRY (2002)

Article Chemistry, Multidisciplinary

Ionic liquids. Green solvents for the future

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PURE AND APPLIED CHEMISTRY (2000)