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Article
Chemistry, Multidisciplinary
Mahendra S. Gaikwad et al.
Summary: In this study, the RHDAC electrode was used for the electrosorption of hexavalent chromium and fluoride (HCAF) by capacitive deionization. Different multicomponent isotherm (MCI) models were applied to simulate the simultaneous removal of HCAF using the RHDAC electrode. The results showed that the MCIM3 (Extended Langmuir) and MCIM5 (Non modified Redlich Peterson) models fitted the experimental data better with lower MPSD for HCAF. The RHDAC electrode was effective for the sorption of HCAF from low concentrated feed.
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
(2023)
Article
Environmental Sciences
Eleonore Pierrat et al.
Summary: Several water footprint indicators have been developed to address the issues of freshwater stress. Volumetric footprints focus on water allocation and productivity, while impact-oriented footprints aim to minimize the negative effects of water use on human health, ecosystems, and freshwater resources. However, challenges in combining these perspectives remain, such as pollution and ecosystem impact modeling. To bridge these gaps, a water footprint assessment framework is proposed, incorporating regionalized indicators for water biodiversity and water resource, and complemented with a sustainability assessment. The framework is tested on the water use sustainability in the European Union, revealing the need for concerted efforts in reducing the impacts of emissions and water consumption.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Hu Kang et al.
Summary: Fluorine pollution is a global public health problem and adsorption is the primary method for removing fluoride from drinking water. However, it has limitations such as difficulty in recovering the adsorbent and causing secondary pollution. Capacitive deionization (CDI) has gained attention due to its simple operation, low energy consumption, and minimal environmental impact. In this study, CZBN/PPy-MnO2 system was developed as an effective method for fluorine removal, exhibiting high selectivity and stability.
Article
Chemistry, Physical
Dan Yang et al.
Summary: NiFe-LDH and NiFe/MoS2 were synthesized via a hydrothermal method to decontaminate wastewater contaminated with high concentrations of Cr(VI). The addition of MoS2 improved the conductivity, capacitance reversibility, charge efficiency, coulombic efficiency, and stability of NiFe/MoS2. The CDI process using NiFe/MoS2 and activated carbon as the anode and cathode achieved a deionization capacity of 49.71 mg/g and a removal ratio of 99.42% for Cr(VI) at 1.2 V and 20 mL/min. The Langmuir model accurately described the isothermal data, with a theoretical maximum deionization capacity of NiFe/MoS2 for Cr(VI) being 106.2 mg/g. The interaction mechanisms included electrostatic attraction, surface complexation, and reduction. These findings suggest the practical application potential of NiFe/MoS2 in Cr(VI) wastewater treatment.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Engineering, Environmental
Yan Li et al.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Chemical
Fengkai Zhou et al.
Summary: A new low-carbon strategy is proposed to recycle discarded masks and demonstrate their utilization in Cr(VI) removal and seawater desalination.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Agricultural Engineering
Quoc-Minh Truong et al.
Summary: Capacitive deionization (CDI) is an efficient, energy-saving and environmentally friendly technology for water treatment. This study investigated the use of biochar derived from brown algae as CDI electrode material for the removal of Cu(II) from aqueous solutions. The results showed that the optimal pyrolysis temperature was 700 degrees C, and the biochar exhibited excellent electrosorption capacity for Cu(II) and other heavy metals. It also maintained a high Cu(II) removal efficiency in repeated cycles and demonstrated great applicability for water treatment.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Chemical
Zhiyou Tan et al.
Summary: The study presents a novel pathway to prepare flexible and binder-free MXene@carbon dots (MXene@CDs) electrodes using electrostatic self-assembly. The unique microflower structure of the MXene-based materials reduces self-stacking, improves ion transport, and enhances ion storage. The electrode exhibits excellent deionization capacity and high energy recovery.
Article
Chemistry, Physical
Sumanta Sahu et al.
Summary: A new flower-like cerium phosphate polyaniline nanocomposite (CePO4-PANI) material was synthesized and investigated for efficient removal of Cr(VI) from water. The material exhibited a high adsorption capacity of 129.87±2.1 mg g(-1) at room temperature in a wide pH range of 2 to 6. It showed high tolerance to co-anions and efficient regeneration after multiple adsorption-desorption cycles, making it a promising alternative for water treatment.
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
Jingjing Lei et al.
Summary: This study successfully increased the storage capacity and removal efficiency of chloride ions by preparing a special structure material, providing new insights for Cl- storage electrode in capacitive deionization technology.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Dan Yang et al.
Summary: CAL and CAL-PPy were prepared to efficiently remove high concentrations of Cr(VI) wastewater, with CAL-PPy showing improved adsorption performance due to increased specific surface area. The mechanisms involved electrostatic attraction, surface complexation, anion exchange, and reduction to low-toxicity Cr(III).
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Xiaoxian Hu et al.
Summary: This study presents a facile and effective approach to prepare Co and Co3O4 nanoparticles co-incorporating nitrogen-doped carbon nanotubes (Co-Co3O4/N-CNTs) as a novel and efficient CDI electrode. The encapsulation of Co-Co3O4 nanoparticles in CNTs inhibits Co leaching and enhances the desalination capacity. The optimized Co-Co3O4/N-CNTs electrode exhibits outstanding desalination capacity of 66.91 mg NaCl g(-1) at 1.4 V.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Chemical
Yanmeng Cai et al.
Summary: The effective-designed three-dimensional Mxene-based composite PPy-NiCo-LDH@Mxene shows significant specific capacitance, superior charging and discharging property, and enhanced electrochemical cyclic stability for CDI applications. Additionally, it displays superb adsorption selectivity for Ca2+ and Mg2+ ions over Na+ ions in multi-salt solutions, indicating its potential for hard water softening processes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Zhibo Zhao et al.
Summary: The rational design and construction of graphene-like layered transition-metal disulfides (TMDs) for capacitive desalination (CDI) electrodes have attracted global interest. An advanced self-supported MoS2/CoS2@TiO2 nanotube (TNT) hybrid electrode achieved high Na+ adsorption capacity and excellent regeneration performance, while also demonstrating high removal efficiencies for various heavy metal ions, highlighting its potential for wastewater purification.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Wangwang Ji et al.
Summary: In this study, a BiOCl/PPy-Cl hybrid film with core-shell nanosheet structure was successfully fabricated for selective extraction of chloride ions with superior conductivity and high adsorption capacity. The hybrid film displayed prominent selectivity and stable adsorption performance towards Cl- due to the outer PPy-Cl shell. The excellent Cl- uptake performance was attributed to the open interlayer structure of BiOCl and the collaboratively-driven force generated by the reversible electrochemical redox of BiOCl and PPy.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Kai Wang et al.
Summary: This study demonstrates the potential of the rocking-chair CDI system for efficient desalination through the use of special materials and appropriate battery design.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Green & Sustainable Science & Technology
Taozhu Yin et al.
Summary: A MoS2/AC composite material was synthesized and demonstrated to effectively remove Cd2+ from wastewater, while exhibiting excellent selective adsorption in the presence of other ions. The material maintained high adsorption capacity even after multiple cycles and showed remarkable removal capability in actual wastewater.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Jianyu Xing et al.
Summary: An ion imprinting material, Gel/CS/PPy, was synthesized, and a cyclic enrichment process including adsorption-photoreduction-fixation-readsorption of Cr(VI) was established. The results showed that Gel/CS/PPy has good adsorption capacity for Cr(VI) and excellent photocatalytic ability to reduce Cr(VI) to Cr(III).
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Jiao Chen et al.
Summary: This study demonstrates the selective removal of nitrate (NO3-) in an electrosorption process using a thin, porous carbonized eggshell membrane (CESM). The CESM exhibits high selectivity for NO3- over other ions and achieves a significantly higher NO3-/Cl- selectivity compared to activated carbon electrodes. This high selectivity leads to a reduction in energy consumption for nitrate removal.
Article
Chemistry, Multidisciplinary
Shuang Liu et al.
Summary: In this study, a pseudocapacitive electrode with a large surface area was synthesized using an electrostatic attraction strategy, which consisted of W18O49 nanoflowers and Ti3C2Tx MXene nanosheets. This composite exhibited good electrochemical activity and prevention of restacking, resulting in a high specific capacitance, superior rate capability, and good cycle stability as a pseudocapacitive electrode. A quasi-solid-state asymmetric supercapacitor (ASC) was fabricated using this electrode and an activated carbon cathode coupled with a redox electrolyte of FeBr3, displaying high voltage, energy density, and power density.
Article
Materials Science, Multidisciplinary
Abhijit Behera et al.
Summary: In this study, a novel polypyrrole modified alpha-zirconium phosphate nanocomposite was synthesized and demonstrated its potential in removing hexavalent chromium.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Engineering, Environmental
Yanqing Cong et al.
Summary: This study proposed a new sulfite/iodide/UV process for efficient removal of toxic hexavalent chromium (Cr(VI)) under alkaline conditions. The process accelerated the removal kinetics of Cr(VI) and showed effectiveness in real surface water and industrial wastewater.
Article
Chemistry, Multidisciplinary
Xiaolu Liu et al.
Summary: Seawater contains uranium at a concentration of approximately 3.3 ppb, making it a valuable and sustainable nuclear fuel source. This study developed an adsorption-electrocatalytic platform for extracting uranium from seawater using atomically dispersed indium anchored on hollow nitrogen-doped carbon capsules functionalized with flexible amidoxime moieties. The platform showed excellent uranyl capture properties and high selectivity for uranium extraction over vanadium in seawater. X-ray absorption spectroscopy and in situ Raman results provided detailed insights into the molecular mechanism of uranium extraction. This work contributes to the growing suite of technologies for harvesting valuable metals from the earth's oceans.
Article
Engineering, Environmental
Caifeng Xia et al.
Summary: In this study, a novel composite material LDH@CNT was prepared using an in-situ method, which had a favorable adsorbent structure due to the mutual support of LDHs and CNTs. The adsorption kinetics of LDHs, CNTs, and LDH@CNT composites for tetracycline were well described by intraparticle diffusion and pseudo-second-order models, indicating that the adsorption site played a major role. The Generalized Langmuir model was found to better describe the adsorption process than the Langmuir model, suggesting multiple interactions between tetracycline and the composite material. Site energy distribution theory combined with molecular simulation explained the adsorption mechanisms, and the removal of tetracycline by LDHs, CNTs, and LDH@CNT composites was calculated. The results showed that LDH@CNT composites had lower average site energies compared to LDHs and CNTs, but had more exposed adsorption active sites, leading to improved removal efficiency of tetracycline.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Ling Yao et al.
Summary: A catalyst-free strategy for aqueous Cr(VI) extraction is developed, achieving efficient extraction and recovery of chromium resources through the formation of a polyhydroxy Cr(V) complex.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Ziyi Zhou et al.
Summary: This study evaluates the capability of iron-modified biochar (FeBC) in removing hexavalent chromium (Cr(VI)) and explores the reaction mechanisms. The results show that a bilayer column with FeBC and limestone layers performs the best in Cr(VI) removal with low cost. The corrosion of FeBC is related to pH and Cr(VI) concentration, and the leached Fe is attenuated and reutilized in the FeBC column. Cr(VI) is reduced to Cr(III) and adsorbed or precipitated on the biochar.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Chemical
Luwei Miao et al.
Summary: The application of polypyrrole/carbon aerogel (Ppy/CA) electrodes in capacitive deionization (CDI) desalination was studied. The Ppy/CA samples showed better electrochemical properties and ion diffusion rate compared to carbon aerogel. The Ppy/CA electrode exhibited enhanced pseudocapacitance generation. The optimal Ppy/CA-2 CDI system demonstrated high adsorption capacity, fast salt adsorption rate, and good long-term stability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Editorial Material
Multidisciplinary Sciences
Ling Yao et al.
Article
Nanoscience & Nanotechnology
Xun-rui Wang et al.
Summary: In this study, a hierarchically architectured hybrid electrode was developed by spinning MXene into PAN-based carbon nanofibers, resulting in a highly conductive carbon nanocomposite framework. The obtained membrane electrodes showed outstanding specific capacitance, low charge transfer resistance, excellent cycling performance, and selective adsorption properties for divalent ions in high-salt water.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Environmental
Li Xiang et al.
Summary: The study successfully fabricated PPy/MoS2 composites as efficient sorbents for Cr(VI) removal, showing superior adsorption capacity and cyclic stability. The sorption of Cr(VI) was significantly influenced by pH, with optimal removal efficiency achieved under acidic conditions; the adsorption process was mainly controlled by pseudo-second-order kinetics and Langmuir isotherm model; ion exchange, chemical reduction, and surface chelation played crucial roles in the elimination of Cr(VI).
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Agricultural Engineering
Si-Yuan Li et al.
Summary: N-doped hydrochar (NHC) was successfully synthesized by one-pot hydrothermal carbonization (HTC) of NH4Cl and bamboo, showing higher adsorption capacity and reduction ability for Cr(VI) than undoped hydrochar (HC), making it a cheap and efficient adsorbent for removing aqueous Cr(VI).
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Minlin Mao et al.
Summary: The study presents a selective capacitive removal (SCR) technology for lead ions in wastewater using MoO2/C electrodes, effectively reducing lead ion concentration and exhibiting high efficiency in mixtures of heavy metal ions solutions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Chemical
Gang Wang et al.
Summary: Fluoride contamination in drinking water or groundwater is a major health problem caused by natural and human activities. This study proposed a novel CDI defluorination method using layered metal oxide electrode, achieving satisfactory results with NiFeMn-LMO electrode. The mechanism was analyzed, showing the potential of Mn improvement for high-performance CDI defluorination electrode materials.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Xiaoyan Yang et al.
Summary: This study presents a novel Ti3C2Tx/PANI/PPY electrode with a butter-sandwich microstructure, exhibiting high salt adsorption capacity, fast salt adsorption rate, and cycling stability in capacitive deionization. The outstanding CDI performance is achieved by the intercalation and binding effects, providing a new direction for enhancing CDI performance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Shifeng Zhao et al.
Summary: Mg-Al layered double hydroxides coated waste textile (MgAl-LDH@WT) were used for the removal of toxic metal ions such as As(V) and Cr(VI) from soil samples, yielding high adsorption capacities and showing a preferential adsorption of As(V) over Cr(VI). The results demonstrate a promising strategy for the excellent removal and convenient recovery of anionic heavy metals contaminated soil, highlighting the method's stability and partition capability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Shaojun Li et al.
Summary: This study introduces a new eco-friendly method for rapid and selective extraction of uranium from aqueous solutions under visible light without solid materials, showing great potential for applications in environmental protection and resource recovery.
SCIENCE CHINA-CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Xiaofei Zhang et al.
Summary: Biomass-derived porous carbon materials have good application prospects in electrosorption due to their low cost, abundant natural resources, and excellent performance. In this study, a three-dimensional interconnected structure porous carbon (CPC) was successfully synthesized from waste biomass chestnut shells, showing superior double-layer capacitance and conductivity. The experimental results demonstrate that CPC has high removal efficiency and good regeneration performance in electrosorption applications.
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Xue Zhang et al.
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(2020)
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Sung Pil Hong et al.
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Tie Gao et al.
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(2020)
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Haojun Hu et al.
APPLIED SURFACE SCIENCE
(2020)
Review
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Hao Peng et al.
ENVIRONMENTAL CHEMISTRY LETTERS
(2020)
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Mahendra S. Gaikwad et al.
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Yunlong Zhou et al.
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G. Bharath et al.
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Rong Chen et al.
ADVANCED MATERIALS
(2019)
Article
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G. Bharath et al.
SCIENCE OF THE TOTAL ENVIRONMENT
(2019)
Review
Chemistry, Multidisciplinary
Arshid Bashir et al.
ENVIRONMENTAL CHEMISTRY LETTERS
(2019)
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Xiaoting Hong et al.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2019)
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Ziming Wang et al.
MATERIALS HORIZONS
(2019)
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Xinkun Zhao et al.
ROYAL SOCIETY OPEN SCIENCE
(2018)
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Mahendra S. Gaikwad et al.