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- W3131794704 abstract "Highly compressible sewage sludge (SS) derived geopolymer was magnetized with impregnation of magnetite (Fe3O4) nanoparticles (NPs), and these newly developed and characterized adsorbents were tested in a batch mode for the sorptive removal of metalloid arsenic (As) from a significant potable water resource (groundwater). Various sorption experiments were performed under variable pH (4.0–9.0), magnetized geopolymer dosages (0.1–3 g L−1), contact time (0–180 min), initial As concentrations (10–100 μg L−1) and co–existing anions to develop a critical understanding of the optimal experimental requirements and to assess the sorption kinetics and isotherms. Magnetized geopolymer had better monolayer sorption capacity (∼51.6 μg g−1, after 3 h) for As(V) than only geopolymer (∼9.81 μg g−1, after 3 h) at near neutral pH (∼6.0). The sorption process onto magnetized geopolymer was facilitated by intraparticle diffusion as well as surface complexation mechanisms and was best explained by the pseudo second order kinetic model (R2 ≥ 0.95) and Freundlich and Temkin isotherm models (R2 ≥ 0.90). The exhausted composite adsorbent was sufficiently regenerated up to five sorption–desorption–regeneration cycles using 0.1 M NaOH. Further, it also displayed an excellent As(V) removal capacity from the cocktail mixture of the common geogenic anions and their antagonistic effect follows the order of: NO3− < Cl− < SO42− < F− < PO43−. The proposed waste derived sustainable composite material was proved to be a promising sorbent for economic As(V) removal under simulated complex environmental conditions." @default.
- W3131794704 created "2021-03-01" @default.
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- W3131794704 date "2021-05-01" @default.
- W3131794704 modified "2023-09-27" @default.
- W3131794704 title "Utilization of sewage sludge derived magnetized geopolymeric adsorbent for geogenic arsenic removal: A sustainable groundwater in-situ treatment perspective" @default.
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- W3131794704 doi "https://doi.org/10.1016/j.jclepro.2021.126466" @default.
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