Department Of Environmental Science And Technology

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    Phytobiomass-based nanoadsorbents for sequestration of aquatic emerging contaminants: An Overview
    (Elsevier Ltd, 2023-02-15T00:00:00) Sharma, Anchal; Kumar, Nitin; Mudhoo, Ackmez; Garg, Vinod Kumar
    Nanotechnology that is based on phytobiomass is a technique that has the potential to play a major role in wastewater treatment since it is environmentally friendly, easy to deploy, and cost-effective. This technology employs plant parts such as leaves, flowers, stems, seeds and roots, and agricultural wastes to synthesize nanoadsorbents. These nanoadsorbents have unique properties, such as smaller size, higher surface-volume ratio, magnetic behaviour, thermal stability, selectivity, porous structure, surface functionalization, catalytic properties and target-specific capabilities, which make them an attractive material for removing �Emerging Contaminants� from contaminated water and wastewater. Pharmaceuticals, personal care products, endocrine disruptors, surfactants, disinfectants, flame retardants and pesticides are the various classes of emerging contaminants used almost every day globally. Adsorption is one green and sustainable technology that has shown excellent performance when employing nanoadsorbents to purify contaminated water. It is an effective and efficient technology for removing emerging contaminants that inform polluted water or wastewater to restore water quality. This review aims to summarize the current research progress in the use of different nanoadsorbents synthesized from various plant parts for removing aqueous emerging contaminants. � 2023 Elsevier Ltd
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    Application of EDTA modified Fe3O4/sawdust carbon nanocomposites to ameliorate methylene blue and brilliant green dye laden water
    (Academic Press Inc., 2019) Kataria N.; Garg V.K.
    This work explored the potential of magnetic sawdust carbon nanocomposites for cationic dyes removal from aqueous medium. EDTA modified magnetic sawdust carbon nanocomposites (EDTA@Fe3O4/SC ncs) were prepared by biogenic green reduction and precipitation approach. The surface properties, structure and composition of nanocomposites were characterized by HRTEM, FESEM, XRD, EDX, BET, FTIR etc. The Fe3O4 nanoparticles were 10-20 nm in diameters and having 14 m2/g surface area. Removal of Methylene blue (MB) and Brilliant green (BG) dyes from aqueous medium was studied in batch mode experiments. The maximum removal was achieved at neutral pH 7.0 with in 30 min. Adsorption capacity of EDTA@Fe3O4/SC for MB and BG dyes was 227.3 mg/g and 285.7 mg/g, respectively. Dye adsorption behaviour is well explained by Freundlich model. The rate of cationic dye adsorption is explained by pseudo-second order model. The value of thermodynamic parameters confirmed that adsorption process was spontaneous and favourable. Desorption and reusable efficiency of nanocomposites was also evaluated.