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Synthesis and Performance Evaluation of Novel Bentonite-Supported Nanoscale Zero Valent Iron for Remediation of Arsenic Contaminated Water and Soil

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dc.contributor.author Raza, Md Basit
dc.contributor.author Datta, Siba Prasad
dc.contributor.author Golui, Debasis
dc.contributor.author Barman, Mandira
dc.contributor.author Das, Tapas Kumar
dc.contributor.author Sahoo, Rabi Narayan
dc.contributor.author Upadhyay, Devi
dc.contributor.author Rahman, Mohammad Mahmudur
dc.contributor.author Behera, Biswaranjan
dc.contributor.author Naveenkumar, A
dc.date.accessioned 2024-08-29T06:41:15Z
dc.date.available 2024-08-29T06:41:15Z
dc.date.issued 2023-02-25
dc.identifier.issn 1420-3049
dc.identifier.uri http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/13294
dc.description.abstract Groundwater arsenic (As) pollution is a naturally occurring phenomenon posing serious threats to human health. To mitigate this issue, we synthesized a novel bentonite-based engineered nano zero-valent iron (nZVI-Bento) material to remove As from contaminated soil and water. Sorption isotherm and kinetics models were employed to understand the mechanisms governing As removal. Experimental and model predicted values of adsorption capacity (qe or qt) were compared to evaluate the adequacy of the models, substantiated by error function analysis, and the best-fit model was selected based on corrected Akaike Information Criterion (AICc). The non-linear regression fitting of both adsorption isotherm and kinetic models revealed lower values of error and lower AICc values than the linear regression models. The pseudo-second-order (non-linear) fit was the best fit among kinetic models with the lowest AICc values, at 57.5 (nZVI-Bare) and 71.9 (nZVI-Bento), while the Freundlich equation was the best fit among the isotherm models, showing the lowest AICc values, at 105.5 (nZVI-Bare) and 105.1 (nZVI-Bento). The adsorption maxima (qmax) predicted by the non-linear Langmuir adsorption isotherm were 354.3 and 198.5 mg g−1 for nZVI-Bare and nZVI-Bento, respectively. The nZVI-Bento successfully reduced As in water (initial As concentration = 5 mg L−1; adsorbent dose = 0.5 g L−1) to below permissible limits for drinking water (10 µg L−1). The nZVI-Bento @ 1% (w/w) could stabilize As in soils by increasing the amorphous Fe bound fraction and significantly diminish the non-specific and specifically bound fraction of As in soil. Considering the enhanced stability of the novel nZVI-Bento (upto 60 days) as compared to the unmodified product, it is envisaged that the synthesized product could be effectively used for removing As from water to make it safe for human consumption. en_US
dc.language.iso en_US en_US
dc.publisher MDPI Publications en_US
dc.subject Groundwater sources en_US
dc.subject Performance evaluation en_US
dc.subject Arsenic en_US
dc.title Synthesis and Performance Evaluation of Novel Bentonite-Supported Nanoscale Zero Valent Iron for Remediation of Arsenic Contaminated Water and Soil en_US
dc.type Article en_US


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