☆ 4.7 Review

Functionalizing natural polymers to develop green adsorbents for wastewater treatment applications

CARBOHYDRATE POLYMERS (2024)

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Article Polymer Science

Polymer-based biomaterials for pharmaceutical and biomedical applications: A focus on topical drug administration

Patricia C. Pires et al.

Summary: The increasing emergence of skin diseases and the difficulty in treating damaged skin using conventional therapies have called for the development of novel drug delivery systems utilizing natural polymers. These natural polymers offer advantages such as biocompatibility, biodegradability, economic feasibility, and inherent bioactive properties. This review examines the latest drug delivery system technologies using natural polymers and discusses their in vitro, ex vivo, and in vivo experiments. Additionally, it highlights the therapeutic capabilities of biopolymer-based nanoparticles for various skin conditions.

EUROPEAN POLYMER JOURNAL (2023)

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Article Biochemistry & Molecular Biology

Divalent metal ion removal from simulated water using sustainable starch aerogels: Effect of crosslinking agent concentration and sorption conditions

Paulo H. Camani et al.

Summary: This study evaluates corn starch aerogels for the adsorption of potentially toxic elements (PTEs) [Cd(II) or Zn(II)] in aqueous systems. Different crosslinking agent concentrations and sorption conditions were studied, and the properties of the aerogels were evaluated. The results showed that higher adsorption capacity and efficiency were achieved at an initial concentration of 100 ppm, with an adsorption time of 12 hours and an adsorbent weight of 3.0 g. The Aero 1:1.5 sample showed better results due to its high porosity, smaller pore sizes, high pore density, and high specific surface area. Hydroxyl groups in the starch aerogel exhibited 30% adsorption efficiency for Cd(II) ions, while Zn(II) ions were not absorbed.

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES (2023)

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Review Polymer Science

Chitin and Chitosan as Polymers of the Future-Obtaining, Modification, Life Cycle Assessment and Main Directions of Application

Klaudia Piekarska et al.

Summary: Natural polymers, such as chitin and chitosan, have great potential applications in various industries. Chitin, as the second most abundant natural polymer, has been largely unused in the food industry but can be efficiently managed as waste. Through research, a soluble and environmentally friendly form of chitin has been developed, opening up possibilities in medicine, cosmetics, food, textiles, agriculture, and more. Chitosan, a modified form of chitin, offers further benefits and wide opportunities for customization and biomimetic applications. This review provides a comprehensive overview of the modification possibilities of chitin and chitosan, their applications, and their life cycle assessment.

POLYMERS (2023)

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Article Environmental Sciences

Developments and application of chitosan-based adsorbents for wastewater treatments

Pankaj Bhatt et al.

Summary: Water quality is deteriorating due to the increasing levels of toxic contaminants discharged into aquatic environments. A promising solution is the use of biodegradable and biocompatible additives, such as chitosan and its composites, which have the potential to remove various pollutants from wastewater. However, there are challenges in using chitosan, such as lack of selectivity, low mechanical strength, and solubility issues. Modification approaches have been explored to improve its properties for wastewater treatment. Chitosan-based nanocomposites have shown effectiveness in removing metals, pharmaceuticals, pesticides, and microplastics from wastewater, making them a cutting-edge tool for water purification.

ENVIRONMENTAL RESEARCH (2023)

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Article Biochemistry & Molecular Biology

Cellulose Modified with Polyethylenimine (PEI) Using Microwave Methodology for Adsorption of Chromium from Aqueous Solutions

Kongsak Pattarith et al.

Summary: A large amount of agricultural waste was used to prepare cellulose (Cel) and surface modified it with PEI (Cel-PEI) using the microwave method. The adsorption capacity of Cel-PEI for Cr (VI) was found to be 106.60 mg/g, while unmodified Cel had a capacity of 23.40 mg/g. The material recovery showed a decrease in efficiency of 22.19% and 54.27% in the second and third cycles, respectively.

MOLECULES (2023)

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Article Polymer Science

Effective Endotoxin Removal from Chitosan That Preserves Chemical Structure and Improves Compatibility with Immune Cells

Sophie L. Reay et al.

POLYMERS (2023)

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Review Polymer Science

Recent Application Prospects of Chitosan Based Composites for the Metal Contaminated Wastewater Treatment

Ashoka Gamage et al.

Summary: Heavy metals, known for their toxic nature and ability to accumulate and magnify in the food chain, are a major environmental concern. The use of environmentally friendly adsorbents, such as chitosan (CS)-a biodegradable cationic polysaccharide, has gained attention for removing heavy metals from water. This review discusses the physicochemical properties of CS and its composites and nanocomposites and their potential application in wastewater treatment.

POLYMERS (2023)

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Review Pharmacology & Pharmacy

Recombinant protein-based injectable materials for biomedical applications

Cristobal Garcia Garcia et al.

Summary: Injectable nanocarriers and hydrogels are widely used for various biomedical applications, such as delivering biotherapeutic cargo and serving as matrices for tissue engineering. Recent advances in using recombinant protein-based materials as injectable platforms under physiological conditions have enabled the development of nanoparticles and tissue engineering matrices. Protein-engineered biomaterials offer high customizability and tunable rheological properties, encapsulation efficiencies, and delivery profiles. This review highlights the key advantages of utilizing stimuli-responsive properties of recombinant polypeptide-based materials.

ADVANCED DRUG DELIVERY REVIEWS (2023)

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Article Engineering, Chemical

A Facile Hydrothermal Synthesis of S-VO2-Cellulose Nanocomposite for Photocatalytic Degradation of Methylene Blue Dye

Mostafa Y. Y. Nassar et al.

Summary: A novel UV-light-active MCC/S-VO2 photocatalyst was synthesized via hydrothermal route. Various techniques were used for the characterization of the photocatalyst. The photocatalytic degradation of methylene blue (MB) by MCC/S-VO2 showed superior performance compared to pure V2O5 and doped S-VO2. The addition of H2O2 significantly enhanced the photodegradation of MB.

PROCESSES (2023)

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Article Environmental Sciences

Cellulose/inorganic nanoparticles-based nano-biocomposite for abatement of water and wastewater pollutants

Zhen Zhang et al.

Summary: Nanostructured materials play a significant role in wastewater treatment due to their advantages of reduced capital and operational expenses, low dose, and pollutant selectivity. The nanocomposites of cellulose with inorganic nanoparticles have attracted great interest for their outstanding properties and high specific surface area. Integrating inorganic nanoparticles with cellulose biopolymers for wastewater treatment offers advantages such as colloidal stability and ease of isolation of magnetic materials. This article provides a comprehensive overview of water treatment approaches using cellulose/inorganic nanoparticles-based bio-nanocomposites, including functionalization of cellulose, functionalization mechanism, and engineered hybrid materials. The purification of wastewater through the composites of cellulose/inorganic nanoparticles via adsorption, photocatalysis, and antibacterial approaches is also highlighted.

CHEMOSPHERE (2023)

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Article Environmental Sciences

Green composites based on volcanic red algae Cyanidiales, cellulose, and coffee waste biomass modified with magnetic nanoparticles for the removal of methylene blue

Paulina Pietrzyk et al.

Summary: In this study, green nanocomposites based on biomass and superparamagnetic nanoparticles were synthesized and utilized for efficiently removing methylene blue from water using magnetic separation. The synthesized adsorbents, comprising iron-oxide nanoparticles coated with coffee, cellulose, and red volcanic algae waste, enabled easy separation from aqueous solutions with magnets. SEM, FT-IR, and XPS methods were employed to characterize the morphology and chemical composition of the nanocomposites. The adsorption studies demonstrated that the adsorption performance strongly depended on the morphology and the type of organic adsorbent. The maximum adsorption capacities for coffee@Fe3O4-2, cellulose@Fe3O4-1, and algae@Fe3O4-1 were 38.23 mg g(-1), 41.61 mg g(-1), and 48.41 mg g(-1), respectively. The Langmuir and Redlich-Peterson models were found to appropriately describe the adsorption mechanisms for coffee@Fe3O4, cellulose@Fe3O4, and algae@Fe3O4, respectively. The nanocomposites exhibited high adsorption effectiveness, with up to 90% removal efficiency for methylene blue.

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2023)

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Review Chemistry, Applied

Enzymatic modification of starch: A green approach for starch applications

Sneh Punia Bangar et al.

Summary: This article introduces the methods of modifying starch, focusing on the mechanism and functionality of enzymatic modification to alter starch structure. Enzymatic modification can improve the properties of starch, including gel stability and retardation of retrogradation during storage. Enzymatic modification of starch has promising applications in the food industry.

CARBOHYDRATE POLYMERS (2022)

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Article Polymer Science

Progress in preparation of thiolated, crosslinked, and imino-chitosan derivatives targeting specific applications

J. Alkabli

Summary: Chitosan's 'tunable' characteristics, with reactive hydroxyl and amine groups on its surface, make it a subject of interest for researchers worldwide. Modification approaches such as Schiff base condensation, crosslinking, and thiolation have shown amazing physicochemical characteristics and multidisciplinary applications, significantly enhancing the potentials of chitosan for various fields.

EUROPEAN POLYMER JOURNAL (2022)

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Article Agricultural Engineering

Ultralight and porous cellulose nanofibers/polyethyleneimine composite aerogels with exceptional performance for selective anionic dye adsorption

Weihua Zhang et al.

Summary: In this study, a novel ultralight aerogel-based adsorbent with a highly porous structure and good mechanical integrity was developed. It showed excellent water stability, fast shape recovery, and ultra-fast water transport. Additionally, the adsorbent exhibited excellent selective adsorption and separation performance. This research provides a new strategy for the development of low-cost and highly efficient adsorbents for wastewater treatment.

INDUSTRIAL CROPS AND PRODUCTS (2022)

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Article Engineering, Environmental

Adsorption of 60Co and 154+152Eu Using Graft Copolymer of Starch-Polyacrylic Acid-Polyvinylsulfonic Acid

Mohamed Abdelhamid Ghamry et al.

Summary: St-g-PAA-PVSA graft copolymer was synthesized using gamma radiation as an initiator. Its chemical structure, morphology, and thermal stability were investigated. The graft copolymer was used as an adsorbent for the removal of Co(II) and Eu(III) radionuclides. Experimental factors such as pH, contact time, initial concentration of adsorbate, and temperature were studied to optimize the removal conditions. Kinetic and equilibrium data were well described by the pseudo-second order kinetic model and Langmuir model, respectively. Thermodynamic parameters indicated that the adsorption of Co(II) was endothermic, while the adsorption of Eu(III) was exothermic, and both processes were spontaneous. AlCl3 and HCl were effective desorbing agents for the radionuclides.

JOURNAL OF POLYMERS AND THE ENVIRONMENT (2022)

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Article Engineering, Chemical

Starch-derived flocculant with hyperbranched brush architecture for effectively flocculating organic dyes, heavy metals and antibiotics

Shuai Kang et al.

Summary: This study developed a novel starch-derived flocculant with a hyperbranched brush architecture and evaluated its performance in removing combined pollutants. The results showed that the flocculant had outstanding capabilities in removing cationic pollutants such as organic dyes, heavy metals, and antibiotics. The hyperbranched brush structure of the flocculant improved its accessibility to pollutants and enhanced its flocculation performance. This research provides important insights for the design of eco-friendly starch flocculants for treating combined cationic pollutants.

JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS (2022)

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Article Green & Sustainable Science & Technology

Natural and industrial wastes for sustainable and renewable polymer composites

Oisik Das et al.

Summary: Biocomposites made from various wastes are important for promoting sustainability, reducing resource consumption, and facilitating the development of a circular economy.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2022)

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Review Chemistry, Multidisciplinary

Natural Polymers and Their Nanocomposites Used for Environmental Applications

Ecaterina Matei et al.

Summary: This review explores the applications of natural polymers in environmental remediation, focusing on their performance in water treatment, soil decontamination, and reduction of atmospheric particulate matter. The potential of nanocomposite polymers as sustainable materials for integrated products is also discussed. Natural polymers, derived from renewable resources, offer high surface area, porosity, and adsorption properties, but future considerations include scaling up production, nanoparticle toxicity, and competition with food production.

NANOMATERIALS (2022)

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Article Materials Science, Multidisciplinary

Ni/NiO doped chitosan-cellulose based on the wastes of barley and shrimp for degradation of ciprofloxacin antibiotic

Moones Honarmand et al.

Summary: A novel nanocomposite containing cellulose, chitosan, and Ni/NiO was synthesized for efficient degradation of ciprofloxacin, showing high degradation efficiency and stability. This nanocomposite has potential applications in reducing the number of antibiotics in water systems.

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T (2022)

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Article Chemistry, Applied

Superhydrophobic starch-based nanocomposite cryogel for oil removal underwater and magnetically guided oil slick cleanup

Fan Wang et al.

Summary: A novel starch-based superhydrophobic absorbent (HMS-SiO2@MSC) was developed by introducing nanoparticles into starch cryogel, showing magnetism and superhydrophobicity for efficient oil spill cleanup.

CARBOHYDRATE POLYMERS (2022)

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Article Polymer Science

Starch Biocryogel for Removal of Methylene Blue by Batch Adsorption

Tarawee Taweekarn et al.

Summary: A green monolithic starch cryogel was prepared and applied for the efficient removal of methylene blue. The cryogel exhibited high removal efficiency and adsorption capacity, with the adsorption process characterized as physical adsorption.

POLYMERS (2022)

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Article Agricultural Engineering

Microwave-assisted synthesis of polyethylenimine-grafted nanocellulose with ultra-high adsorption capacity for lead and phosphate scavenging from water

Jianhua Qu et al.

Summary: Polyethylenimine-grafted nanocellulose (PEIMW@NCMW) synthesized with microwave-assisted synthesis showed excellent adsorption performance and high tolerance in removing Pb(II) and phosphate from water.

BIORESOURCE TECHNOLOGY (2022)

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Article Agricultural Engineering

Fabrication of superhydrophobic/oleophilic starch cryogel via a simple sol-gel immersion process for removing oil from water

Fan Wang et al.

Summary: This study successfully fabricated a superhydrophobic starch-based adsorbent with excellent oil absorption performance and superhydrophobicity, showing promising application in oil spill cleanup.

INDUSTRIAL CROPS AND PRODUCTS (2022)

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Review Polymer Science

Material and Environmental Properties of Natural Polymers and Their Composites for Packaging Applications-A Review

Prabaharan Graceraj Ponnusamy et al.

Summary: The use of plastics in packaging manufacturing has raised concerns about environmental pollution. Natural polymers extracted from renewable resources are being explored as alternatives to plastics due to their biodegradable and non-toxic properties. However, the brittleness and hydrophilic nature of natural polymers limit their suitability for packaging applications. The addition of plasticizers, crosslinkers, and reinforcement agents can improve their mechanical and water vapor resistance properties. Nanocellulose can strengthen the natural polymer-based packaging films by enhancing their tensile strength and water vapor barrier properties.

POLYMERS (2022)

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Review Polymer Science

Chemical Modification, Characterization, and Activity Changes of Land Plant Polysaccharides: A Review

Zhi-Wei Li et al.

Summary: Plant polysaccharides have various biological activities, but their low activity limits widespread application. Chemical modification is an important method to improve the properties of plant polysaccharides. This review summarizes the research progress of chemical modification of land plant polysaccharides and examines the preparation, characterization, and biological activity of modified polysaccharides.

POLYMERS (2022)

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Article Engineering, Environmental

Preparation of high-performance chitosan adsorbent by cross-linking for adsorption of Reactive Red 2 (RR2) dye wastewater

Haojin Li et al.

Summary: In this study, high-performance adsorbents were developed by modifying chitosan with polyethylene glycol and formaldehyde. The adsorption behavior of the prepared chitosan beads in Reactive Red 2 dye wastewater was investigated, and it was found that the adsorption equilibrium followed the Langmuir model and pseudo-second-order kinetic model. The PEGylated chitosan beads showed a high adsorption capacity, attributed to the protonation of NH3+ groups on the surface and the enriched pore structure. HCl solution was effective for the regeneration of the beads, and their swelling behavior was pH-dependent.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2022)

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Article Chemistry, Applied

Immobilization of chitosan grafted carboxylic Zr-MOF to porous starch for sulfanilamide adsorption

Xiangze Jia et al.

Summary: A novel hierarchical porous starch-chitosan-UiO-66-COOH composite was developed for the treatment of pharmaceutical bearing sewage. The carboxylic zirconium metal organic framework within the composite showed high affinity for sulfanilamide adsorption, conforming to pseudo-second-order kinetic and Langmuir isothermic models. This composite preserved unique crystallization and thermal properties while offering stable macro-porous structural skeleton for accommodating nanoparticles.

CARBOHYDRATE POLYMERS (2021)

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Review Chemistry, Applied

Starch, cellulose, pectin, gum, alginate, chitin and chitosan derived (nano) materials for sustainable water treatment: A review

Mahmoud Nasrollahzadeh et al.

Summary: Natural biopolymers, such as cellulose, chitin/chitosan, and starch, are considered greener, sustainable, and eco-friendly materials due to their outstanding structural features, abundant availability, nontoxicity, and biocompatibility. In recent years, polysaccharides have been widely used for making various catalysts, with polysaccharides-supported metal/metal oxide materials being an effective strategy in nanotechnology. Polysaccharides adorned with nanomaterials have shown promising potential as efficient catalysts or sorbents in removing a variety of aqueous pollutants and contaminants.

CARBOHYDRATE POLYMERS (2021)

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Article Environmental Sciences

Enhanced removal of zinc and cadmium from water using carboxymethyl cellulose-bridged chlorapatite nanoparticles

Zhiliang Li et al.

Summary: A new type of nanoparticles, CMC-CAP, was prepared and tested for the removal of Zn2+ and Cd2+ from water. This material showed higher adsorption capacity than the pristine nanoparticles, with a dual-mode isotherm model providing the best fits to the sorption isotherms. The study revealed that Na+ had modest effects on heavy metal uptake, while Ca2+ exerted notable inhibitive effects, and the presence of dissolved organic matter had varying impacts on the uptake of different metals.

CHEMOSPHERE (2021)

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Article Chemistry, Applied

N-methylene phosphonic chitosan aerogels for efficient capture of Cu2+and Pb2+from aqueous environment

Tao Liu et al.

Summary: In this study, NPCS-PEI aerogels were synthesized and showed high adsorption capacities and cycling stability for Cu2+ and Pb2+. The aerogels exhibited excellent selective adsorption properties for Cu2+ and chelation with metal ions involved amino, hydroxyl, and phosphonic acid groups as proved by FTIR and XPS analysis.

CARBOHYDRATE POLYMERS (2021)

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Article Electrochemistry

Enhancement of the photocurrent and electrochemical properties of the modified nanohybrid composite membrane of cellulose/graphene oxide with magnesium oxide nanoparticle (GO@CMC.MgO) for photocatalytic antifouling and supercapacitors applications

Nagi M. El-Shafai et al.

Summary: A novel nanohybrid material (NHM) composed of MgO NPs, GO, and CMC has been successfully synthesized, showing promising potential in water treatment and supercapacitor energy applications. The NHM exhibits excellent electron transfer properties and photocatalytic degradation of organic pollutants.

ELECTROCHIMICA ACTA (2021)

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Article Chemistry, Applied

Investigation of pesticide residue removal effect of gelatinized starch using surface-enhanced Raman scattering mapping

Jie Tang et al.

Summary: The study found that gelatinized starch is more effective and safer in removing pesticide residues from basil leaves compared to commercial surfactants. Gelatinized starch can adjust its conformation according to the size of the guest and efficiently interact with pesticides.

FOOD CHEMISTRY (2021)

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Article Polymer Science

Sorption of cobalt (II) and chromium (III) ions to nitrogen- and sulfur-containing polyampholyte on the basis of polyvinylchloride

Davron Bekchanov et al.

Summary: This article studied the process of obtaining nitrogen- and sulfur-containing polyampholyte by chemically modifying sulphocation exchanger, which was synthesized based on polyvinyl chloride (PVC) and polyethylenepolyamine. The synthesized polyampholyte showed high adsorption performance for removing Co (II) and Cr (III) ions from aqueous solutions, with thermodynamic parameters calculated for the sorption process. The adsorption processes were found to be spontaneous and chemisorption.

POLYMERS FOR ADVANCED TECHNOLOGIES (2021)

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Review Environmental Sciences

Comparison of the aerobic biodegradation of biopolymers and the corresponding bioplastics: A review

Emma M. N. Polman et al.

Summary: This review compares the biodegradation rates and mechanisms of biodegradable plastics made from biopolymers with unmodified biopolymers, and finds that structural changes during the production process affect the biodegradation process. Future research should focus on conducting long-term field experiments to better understand biodegradation processes.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

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Article Chemistry, Physical

Investigation of adsorption of organic dyes present in wastewater using chitosan beads immobilized with biofabricated CuO nanoparticles

Vartika Srivastava et al.

Summary: A novel type of polymer beads, CS/CuO nanocomposite beads, were prepared by incorporating CuO nanoparticles into chitosan beads, showing enhanced efficiency in removing organic dyes from aqueous solutions. The adsorption process followed pseudo first order kinetics and the equilibrium could be related to the Freundlich model. The nanocomposite beads displayed 100% recovery rate and could be reused up to 5 cycles.

JOURNAL OF MOLECULAR STRUCTURE (2021)

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Article Polymer Science

Heavy metal adsorptive application of hydrolyzed corn starch

Chukwunonso O. Aniagor et al.

Summary: The study synthesized polyacrylonitrile-grafted starch hydrogel ('Poly-g-Hyd') for uptake of zinc ions, demonstrating its effectiveness in water absorption and cation binding interaction. The grafted polyacrylonitrile significantly improved the water absorption capacity and stable network chains that are insoluble in water, with the optimum adsorption conditions established at pH 5.0, 20 min and 0.3 g/L.

JOURNAL OF POLYMER RESEARCH (2021)

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Article Chemistry, Physical

Chemical Modification of Chitosan for Removal of Pb(II) Ions from Aqueous Solutions

Adriana Popa et al.

Summary: The study focused on the adsorption performance of modified chitosan with aminophosphonic groups and Ni(II) ions in removing Pb(II) ions from aqueous solutions, investigating the influence of pH, contact time, and Pb(II) ions concentration.

MATERIALS (2021)

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Review Polymer Science

Chitosan: An Overview of Its Properties and Applications

Inmaculada Aranaz et al.

Summary: Chitosan, a polymer with diverse properties and potential applications, is facing challenges such as poor solubility, complex molecular structure, and varied biological properties. Researchers are exploring the chemistry of chitosan to improve its solubility and enhance its properties, focusing on its biological and technological performance. Additionally, applications of chitosan in green processes, such as the synthesis of metallic nanoparticles and support for biocatalysts, are being investigated for their potential in drug delivery systems.

POLYMERS (2021)

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Review Polymer Science

Nature-Based Biomaterials and Their Application in Biomedicine

Eoin Troy et al.

Summary: Natural biomaterials derived from proteins and polysaccharides have diverse applications in tissue engineering, drug delivery, and wound healing due to their chemical stability, structural versatility, biocompatibility, and high availability. These materials have been engineered to enhance their in vivo performance and are promising for use in implantable devices, controlled drug release, and surface coatings in biomedical applications. Ongoing research aims to identify and utilize innovative biomaterials inspired by nature for future advancements in the field.

POLYMERS (2021)

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Article Polymer Science

Designing Natural Polymer-Based Capsules and Spheres for Biomedical Applications-A Review

Kusha Sharma et al.

Summary: Natural polymers can serve as potential carriers for biomedical cargo, offering multifunctional capabilities and targeted delivery. Carriers with different structures can provide sustained release and be used as platforms for cell culture and tissue regeneration. Recent advances in protein-based carriers with porous matrix structure and various core-shell configurations are also discussed in detail.

POLYMERS (2021)

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Article Biochemistry & Molecular Biology

Construction of Porous Starch-Based Hydrogel via Regulating the Ratio of Amylopectin/Amylose for Enhanced Water-Retention

Huiyuan Luo et al.

Summary: This study prepared starch hydrogels using ultrasonic heating, physical blending, and chemical grafting, and investigated the effects of different amylose/amylopectin ratios on their microstructure and water retention properties. The results showed that a 70% amylopectin content led to optimal water absorption and retention performance in the hydrogels.

MOLECULES (2021)

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Article Polymer Science

Polyvinylchloride-based anion exchanger for efficient removal of chromium (VI) from aqueous solutions

Davron Bekchanov et al.

Summary: Chemical modification of polyvinylchloride with polyethylenepolyamine produces anion exchange resin (PPE-1). Characterization techniques indicate weak base amino groups and microporous structure in PPE-1, which effectively removes hexavalent chromium ions from aqueous media. Adsorption kinetics follow a pseudo-second order model and Freundlich isotherm, with a maximum adsorption capacity of 218.4 mg/g for hexavalent chromium ions. Thermodynamic data suggest spontaneous endothermic processes and a chemisorption reaction, with PPE-1 showing 98% removal efficiency for hexavalent chromium ions in wastewater.

POLYMERS FOR ADVANCED TECHNOLOGIES (2021)

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Article Engineering, Chemical

A hierarchical H3PW12O40/TiO2 nanocomposite with cellulose as scaffold for photocatalytic degradation of organic pollutants

Zehao Lin et al.

Summary: By utilizing a natural cellulose scaffold, a series of nanotubular H3PW12O40/TiO2 composites were fabricated, inheriting the porous network structure of the cellulose template. The optimal HPW/TiO2 nanocomposite with 15.6 wt% of H3PW12O40 exhibited a significant increase in photocatalytic efficiency compared to pure TiO2 nanotubes, showcasing its potential in organic pollutant degradation. The hierarchical HPW/TiO2 nanocomposites and HPW/TiO2/cellulose composite sheet demonstrated outstanding and recyclable photocatalytic performances, with the photocatalytic mechanism being driven by photo-induced holes.

SEPARATION AND PURIFICATION TECHNOLOGY (2021)

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Article Engineering, Environmental

Fabrication of novel starch-based composite hydrogel microspheres combining Diels-Alder reaction with spray drying for MB adsorption

Weikun Li et al.

Summary: In this study, magnetic starch-based composite hydrogel microspheres were prepared through a Diels-Alder reaction and their adsorption behavior towards methylene blue was systematically investigated. The adsorption process was found to be spontaneous and endothermic, with good reusability. Optimization experiments revealed that the factors affecting the adsorption capacity of SCHMs were ranked in the order of initial pH > initial concentration > temperature. Due to their safe, non-toxic, and easily recycled advantages, SCHMs have the potential for future applications in water treatment.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

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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)

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Article Engineering, Environmental

Highly efficient and sustainable carboxylated cellulose filters for removal of cationic dyes/heavy metals ions

Cong Li et al.

CHEMICAL ENGINEERING JOURNAL (2020)

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Article Food Science & Technology

An antimicrobial agent prepared by N-succinyl chitosan immobilized lysozyme and its application in strawberry preservation

Xiaodi Niu et al.

FOOD CONTROL (2020)

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Review Biochemistry & Molecular Biology

Advancement on modification of chitosan biopolymer and its potential applications

Nabel A. Negm et al.

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES (2020)

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Article Chemistry, Applied

Encapsulation of starch hydrogel and doping nanomagnetite onto metal -organic frameworks for efficient removal of fluvastatin antibiotic from water

Asmaa K. Mohamed et al.

CARBOHYDRATE POLYMERS (2020)

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Article Agricultural Engineering

Nanoscale Pisum sativum pods biochar encapsulated starch hydrogel: A novel nanosorbent for efficient chromium (VI) ions and naproxen drug removal

Asmaa K. Mohamed et al.

BIORESOURCE TECHNOLOGY (2020)

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Article Biochemistry & Molecular Biology

Carboxymethyl cellulose/carboxylated graphene oxide composite microbeads for efficient adsorption of cationic methylene blue dye

Abdelazeem S. Eltaweil et al.

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES (2020)

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Article Environmental Sciences

Removal of 4-nonylphenol from Surface Water and Municipal Wastewater Effluent Using Three-Dimensional Graphene Oxide-Chitosan Aerogel Beads

Elahe Javadi et al.

INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH (2020)

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Article Chemistry, Multidisciplinary

Anisotropic Nanocellulose Aerogel Loaded with Modified UiO-66 as Efficient Adsorbent for Heavy Metal Ions Removal

Jiajia Li et al.

NANOMATERIALS (2020)

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Review Biotechnology & Applied Microbiology

Removal of pesticides from water and wastewater: Chemical, physical and biological treatment approaches

Iman A. Saleh et al.

ENVIRONMENTAL TECHNOLOGY & INNOVATION (2020)

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Article Chemistry, Multidisciplinary

Sawdust-Based Cellulose Nanocrystals Incorporated with ZnO Nanoparticles as Efficient Adsorption Media in the Removal of Methylene Blue Dye

Opeyemi A. Oyewo et al.

ACS OMEGA (2020)

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Article Engineering, Environmental

Poly(acryloyl hydrazide)-grafted cellulose nanocrystal adsorbents with an excellent Cr(VI) adsorption capacity

Sang-Hee Park et al.

JOURNAL OF HAZARDOUS MATERIALS (2020)

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Article Materials Science, Multidisciplinary

Enhanced removal of copper(II) from acidic streams using functional resins: batch and column studies

Anna Wolowicz et al.

JOURNAL OF MATERIALS SCIENCE (2020)

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Preparation of sulfonated chitosan for enhanced adsorption of methylene blue from aqueous solution

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Recovery of platinum from waste effluent using polyethyleneimine-modified nanocelluloses: Effects of the cellulose source and type

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Modelling on the removal of toxic metal ions from aquatic system by different surface modified Cassia fistula seeds

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The efficient removal of methylene blue from water samples using three-dimensional poly (vinyl alcohol)/starch nanofiber membrane as a green nanosorbent

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A magnetically recyclable chitosan composite adsorbent functionalized with EDTA for simultaneous capture of anionic dye and heavy metals in complex wastewater

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Advances in the preparation of hydrogel for wastewater treatment: A concise review

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Highly efficient removal of nickel and cadmium from water using sawdust-derived cellulose nanocrystals

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Equilibrium, Kinetic and Thermodynamic Studies Of Lead (II) Sorption on Hydrolyzed Starch Graft Copolymers

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Rapid and efficient removal of heavy metal and cationic dye by carboxylate-rich magnetic chitosan flocculants: Role of ionic groups

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Optimizing electric corona treatment for hydroxypropylated starch-based coatings

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Removal of hazardous pollutants using bifunctional hydrogel obtained from modified, starch by grafting copolymerization

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Interaction of anionic dyes with polyaniline implanted cellulose: Organic π-conjugated macromolecules in environmental applications

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Cytotoxicity against cancer cells of chitosan oligosaccharides prepared from chitosan powder degraded by electrical discharge plasma

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Removal of Zn(II) ions from aqueous solution using chemically modified Annona reticulata seeds: kinetics, isotherm and thermodynamics

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Polyethylenimine-cross-linked cellulose nanocrystals for highly efficient recovery of rare earth elements from water and a mechanism study

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Hydrogel beads based on oxidized corn starch cross-linked with gelatin for tartrazine adsorption from aqueous environments

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Chitin nanowhisker (ChNW)-functionalized electrospun PVDF membrane for enhanced removal of Indigo carmine

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Comparison of porous starches obtained from different enzyme types and levels

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A review of the chemical modification techniques of starch

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Removal of metal ions from aqueous solutions using carboxymethyl cellulose/sodium styrene sulfonate gels prepared by radiation grafting

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Extraction of chitosan and its oligomers from shrimp shell waste, their characterization and antimicrobial effect

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Synthesis, characterization, and antimicrobial activities of sulfonated chitosan

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High-Flexibility, High-Toughness Double-Cross-Linked Chitin Hydrogels by Sequential Chemical and Physical Cross-Linkings

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Per-O-acylation of xylan at room temperature in dimethylsulfoxide/N-methylimidazole

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Adsorptive removal of multi-azo dye from aqueous phase using a semi-IPN superabsorbent chitosan-starch hydrogel

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Preparation and antibacterial properties of O-carboxymethyl chitosan/lincomycin hydrogels

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Adsorption of amoxicillin onto quaternized cellulose from flax noil: Kinetic, equilibrium and thermodynamic study

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Adsorption of copper on chitin-based materials: Kinetic and thermodynamic studies

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Cellulose bearing Schiff base and carboxylic acid chelating groups: a low cost and green adsorbent for heavy metal ion removal from aqueous solution

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Preparation of porous graphene oxide/hydrogel nanocomposites and their ability for efficient adsorption of methylene blue

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Efficient removal of cationic dyes using a new magnetic nanocomposite based on starch-g-poly(vinylalcohol) and functionalized with sulfate groups

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Enhanced adsorption of crystal violet by synthesized and characterized chitin nano whiskers from shrimp shell

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JOURNAL OF WATER PROCESS ENGINEERING (2016)

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Lead(II) and methylene blue removal using a fully biodegradable hydrogel based on starch immobilized humic acid

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CHEMICAL ENGINEERING JOURNAL (2015)

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Sources, occurrence and predicted aquatic impact of legacy and contemporary pesticides in streams

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Preparation of acetylsalicylic acid-acylated chitosan as a novel polymeric drug for drug controlled release

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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES (2015)

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Studies of heavy metal ion adsorption on Chitosan/Sulfydryl-functionalized graphene oxide composites

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Thiol-functionalized chitin nanofibers for As (III) adsorption

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Pre-irradiation grafting of acrylonitrile onto chitin for adsorption of arsenic in water

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RADIATION PHYSICS AND CHEMISTRY (2015)

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Fast removal of uranium from aqueous solutions using tetraethylenepentamine modified magnetic chitosan resin

Khalid Z. Elwakeel et al.

BIORESOURCE TECHNOLOGY (2014)

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Removal of Pb(II) and malachite green from aqueous solution by modified cellulose

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CELLULOSE (2014)

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Recent trend in the physical and chemical modification of starches from different botanical sources: A review

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STARCH-STARKE (2014)

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Adsorption of chromium(VI) from aqueous solutions by glycidylmethacrylate-grafted-densified cellulose with quaternary ammonium groups

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APPLIED SURFACE SCIENCE (2013)

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Sulfonated modification of cotton linter and its application as adsorbent for high-efficiency removal of lead(II) in effluent

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BIORESOURCE TECHNOLOGY (2013)

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Highly efficient detoxification of Cr(VI) by chitosan-Fe(III) complex: Process and mechanism studies

Chensi Shen et al.

JOURNAL OF HAZARDOUS MATERIALS (2013)

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Synthesis and Characterization of Thiolated Chitosan Beads for Removal of Cu(II) and Cd(II) from Wastewater

Soon Kong Yong et al.

WATER AIR AND SOIL POLLUTION (2013)

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Graphene oxide-chitosan composite hydrogels as broad-spectrum adsorbents for water purification

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JOURNAL OF MATERIALS CHEMISTRY A (2013)

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Development of an amino functionalized glycidylmethacrylate-grafted-titanium dioxide densified cellulose for the adsorptive removal of arsenic(V) from aqueous solutions

T. S. Anirudhan et al.

CHEMICAL ENGINEERING JOURNAL (2012)

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Heavy metal ions and organic dyes removal from water by cellulose modified with maleic anhydride

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Ionic Liquids - Promising but Challenging Solvents for Homogeneous Derivatization of Cellulose

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MOLECULES (2012)

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Synthesis, characterization of acrylamide grafted chitosan and its use in removal of copper(II) ions from water

Ahmed Jasim M. Al-Karawi et al.

CARBOHYDRATE POLYMERS (2011)

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Batch and fixed-bed column techniques for removal of Cu(II) and Fe(III) using carbohydrate natural polymer modified complexing agents

Salwa A. Ahmed

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Magnetic microparticles based on natural polymers

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INTERNATIONAL JOURNAL OF PHARMACEUTICS (2011)

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Synthesized cellulose/succinic anhydride as an ion exchanger. Calorimetry of divalent cations in aqueous suspension

Julio C. P. Melo et al.

THERMOCHIMICA ACTA (2011)

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Cellulose-Based Native and Surface Modified Fruit Peels for the Adsorption of Heavy Metal Ions from Aqueous Solution: Langmuir Adsorption Isotherms

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JOURNAL OF CHEMICAL AND ENGINEERING DATA (2010)

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Equilibrium and kinetic adsorption study of the adsorptive removal of Cr(VI) using modified wheat residue

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JOURNAL OF COLLOID AND INTERFACE SCIENCE (2010)

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Cellulose-based anion exchanger with tertiary amine functionality for the extraction of arsenic(V) from aqueous media

T. S. Anirudhan et al.

JOURNAL OF ENVIRONMENTAL MANAGEMENT (2010)

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Article Engineering, Environmental

Removal of cyanide from wastewater by adsorption onto pistachio hull wastes: Parametric experiments, kinetics and equilibrium analysis

Gholamreza Moussavi et al.

JOURNAL OF HAZARDOUS MATERIALS (2010)

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Adsorption of chromium (VI) ion from aqueous solution by succinylated mercerized cellulose functionalized with quaternary ammonium groups

Leandro Vinicius Alves Gurgel et al.

BIORESOURCE TECHNOLOGY (2009)

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Review Biotechnology & Applied Microbiology

Biosorption: critical review of scientific rationale, environmental importance and significance for pollution treatment

Geoffrey Michael Gadd

JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY (2009)

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The chemically crosslinked metal-complexed chitosans for comparative adsorptions of Cu(II), Zn(II), Ni(II) and Pb(II) ions in aqueous medium

Arh-Hwang Chen et al.

JOURNAL OF HAZARDOUS MATERIALS (2009)

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Article Chemistry, Physical

Chitin-humic acid hybrid as adsorbent for Cr(III) in effluent of tannery wastewater treatment

Sri Juari Santosa et al.

APPLIED SURFACE SCIENCE (2008)

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Article Agricultural Engineering

Adsorption of Cu(II), Cd(II), and Pb(II) from aqueous single metal solutions by cellulose and mercerized cellulose chemically modified with succinic anhydride

Leandro Vinicius Alves Gurgel et al.

BIORESOURCE TECHNOLOGY (2008)

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Review Biochemistry & Molecular Biology

Preparative methods of phosphorylated chitin and chitosan - An overview

R. Jayakumar et al.

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES (2008)

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Review Biochemistry & Molecular Biology

Marine derived polysaccharides for biomedical applications: Chemical modification approaches

Giovanna Gomez d'Ayala et al.

MOLECULES (2008)

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Review Chemistry, Applied

Chitosan-modifications and applications: Opportunities galore

V. K. Mourya et al.

REACTIVE & FUNCTIONAL POLYMERS (2008)

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Review Chemistry, Physical

pH-Responsive polymers: synthesis, properties and applications

Sheng Dai et al.

SOFT MATTER (2008)

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Adsorption of heavy metal ion from aqueous single metal solution by chemically modified sugarcane bagasse

Osvaldo Karnitz et al.

BIORESOURCE TECHNOLOGY (2007)

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Review Food Science & Technology

Chitin/chitosan: modifications and their unlimited application potential - an overview

K. V. Harish Prashanth et al.

TRENDS IN FOOD SCIENCE & TECHNOLOGY (2007)

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Article Biochemistry & Molecular Biology

Removal of cadmium ions with olive stones:: the effect of somes parameters

G Blázquez et al.

PROCESS BIOCHEMISTRY (2005)

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Fungal biomass with grafted poly(acrylic acid) for enhancement of Cu(II) and Cd(II) biosorption

SB Deng et al.

LANGMUIR (2005)

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Article Biochemistry & Molecular Biology

Copper sorption by chitosan in the presence of citrate ions: influence of metal speciation on sorption mechanism and uptake capacities

J Guzman et al.

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES (2003)

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Lignocellulosic materials as potential biosorbents of trace toxic metals from wastewater

MC Basso et al.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2002)

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Article Chemistry, Physical

An investigation of adsorption of lead(II) and copper(II) ions by water-insoluble starch graft copolymers

LM Zhang et al.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2002)

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Biosorption of trivalent chromium on the brown seaweed biomass

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ENVIRONMENTAL SCIENCE & TECHNOLOGY (2001)

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Review Polymer Science

Controlled functionalization of the polysaccharide chitin

K Kurita

PROGRESS IN POLYMER SCIENCE (2001)

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Review Polymer Science

Unconventional methods in cellulose functionalization

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PROGRESS IN POLYMER SCIENCE (2001)

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