A review on heavy metal biosorption utilizing modified chitosan

Shankar, Shiv; Joshi, Sarita; Srivastava, Rajeev Kumar

doi:10.1007/s10661-023-11963-7

Cited by 10 publications

References 143 publications

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Green preparation of Fe₃O₄/HA/CS magnetic nanoparticles for oil–water separation

Wu,

Ma,

Wang

et al. 2024

J of Chemical Tech & Biotech

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BACKGROUNDDemulsification using chitosan (CS)‐coated magnetic nanomaterials has garnered significant attention. However, traditional methods of for synthesizing chitosan (CS)‐coated magnetic nanomaterials are often contaminated, laborious, and time‐consuming. Moreover, they showed poor demulsification efficiency due to the occupation of free amino groups in CS by crosslinking agents.RESULTSCS‐coated Fe3O4 magnetic nanoparticles (MNPs) were synthesized using humic acid (HA) as a bridge. The Fe3O4/HA/CS MNPs are as recyclable demulsifiers for hexadecane‐water microemulsions. We assessed the impact of MNP dosage, separation time, and pH on demulsification efficiency. Compared with Fe3O4/HA and Fe3O4/CS MNPs, the demulsification efficiency of the Fe3O4/HA/CS MNPs was superior. The pseudo‐second‐order kinetic model and the Sips isotherm best describe the demulsification process. Combining with the influence factors of demulsification efficiency, the demulsification mechanism involves electrostatic interactions between MNPs and oil microparticles. The maximum adsorption capacity for oil by the Fe3O4/HA/CS MNPs was 91.73 mg/g.CONCLUSIONThis research presents a new method for connecting CS to MNPs with a high surface positive charge. As synthesized, Fe3O4/HA/CS MNPs is expected to serve as highly efficient and recyclable demulsifiers for emulsified oil wastewater.This article is protected by copyright. All rights reserved.

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Green preparation of Fe₃O₄/HA/CS magnetic nanoparticles for oil–water separation

Wu,

Ma,

Wang

et al. 2024

J of Chemical Tech & Biotech

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Research on Adsorption of Heavy Metal Ions by Polysaccharide Hydrogels

Liu,

Cai,

et al. 2024

ChemistrySelect

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In recent years, various industrial and agricultural problems have been highlighted, and the pollution of heavy metal ions to water bodies has become a considerable serious phenomenon. Adsorption method is an efficient, low‐cost, and easy to implement method for removing heavy metal ions, which does not produce secondary pollution, and has been widely used in water treatment. Polysaccharides are natural polymers, and their hydroxyl, carboxyl, and amine groups provide feasibility for the synthesis of hydrogels with various structures. The synthesized polysaccharide hydrogel has the characteristics of high adsorption capacity, specific adsorption, nontoxic, and so on. In this review, the kinds of polysaccharide hydrogels and different synthesis methods were discussed first. Then, the adsorption mechanism and different adsorption modes of polysaccharide hydrogels were reviewed. Finally, the effects of different environmental factors on the adsorption capacity of polysaccharide hydrogel were studied. The future research on the adsorption of heavy metal ions by polysaccharide hydrogels was proposed.

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Role of Silicon in the Diversity of the Rhizospheric Microbial Community of Crops

Leite,

Costa,

Rocha

et al. 2024

Sustainable Plant Nutrition in a Changing World

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A review on heavy metal biosorption utilizing modified chitosan

Cited by 10 publications

References 143 publications

Green preparation of Fe₃O₄/HA/CS magnetic nanoparticles for oil–water separation

Green preparation of Fe₃O₄/HA/CS magnetic nanoparticles for oil–water separation

Research on Adsorption of Heavy Metal Ions by Polysaccharide Hydrogels

Role of Silicon in the Diversity of the Rhizospheric Microbial Community of Crops

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A review on heavy metal biosorption utilizing modified chitosan

Cited by 10 publications

References 143 publications

Green preparation of Fe3O4/HA/CS magnetic nanoparticles for oil–water separation

Green preparation of Fe3O4/HA/CS magnetic nanoparticles for oil–water separation

Research on Adsorption of Heavy Metal Ions by Polysaccharide Hydrogels

Role of Silicon in the Diversity of the Rhizospheric Microbial Community of Crops

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Green preparation of Fe₃O₄/HA/CS magnetic nanoparticles for oil–water separation

Green preparation of Fe₃O₄/HA/CS magnetic nanoparticles for oil–water separation