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Rapid adsorptive removal of chromium from wastewater using walnut-derived biosorbents

Contamination of water resources by industrial effluents containing heavy metal ions and management of solid waste from agricultural and food industries is a serious issue. This study presents the valorization of waste walnut shells as an effective and environment-friendly biosorbent for sequestrati...

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Autores principales: Garg, Rajni, Garg, Rishav, Sillanpää, Mika, Alimuddin, Khan, Mohammad Amir, Mubarak, Nabisab Mujawar, Tan, Yie Hua
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10133242/
https://www.ncbi.nlm.nih.gov/pubmed/37100812
http://dx.doi.org/10.1038/s41598-023-33843-3
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author Garg, Rajni
Garg, Rishav
Sillanpää, Mika
Alimuddin
Khan, Mohammad Amir
Mubarak, Nabisab Mujawar
Tan, Yie Hua
author_facet Garg, Rajni
Garg, Rishav
Sillanpää, Mika
Alimuddin
Khan, Mohammad Amir
Mubarak, Nabisab Mujawar
Tan, Yie Hua
author_sort Garg, Rajni
collection PubMed
description Contamination of water resources by industrial effluents containing heavy metal ions and management of solid waste from agricultural and food industries is a serious issue. This study presents the valorization of waste walnut shells as an effective and environment-friendly biosorbent for sequestrating Cr(VI) from aqueous media. The native walnut shell powder (NWP) was chemically modified with alkali (AWP) and citric acid (CWP) to obtain modified biosorbents with abundant availability of pores as active centers, as confirmed by BET analysis. During batch adsorption studies, the process parameters for Cr(VI) adsorption were optimized at pH 2.0. The adsorption data were fitted to isotherm and kinetic models to compute various adsorption parameters. The adsorption pattern of Cr(VI) was well explained by the Langmuir model suggesting the adsorbate monolayer formation on the surface of the biosorbents. The maximum adsorption capacity, q(m,) for Cr(VI) was achieved for CWP (75.26 mg/g), followed by AWP (69.56 mg/g) and NWP (64.82 mg/g). Treatment with sodium hydroxide and citric acid improved the adsorption efficiency of the biosorbent by 4.5 and 8.2%, respectively. The endothermic and spontaneous adsorption was observed to trail the pseudo-second-order kinetics under optimized process parameters. Thus, the chemically modified walnut shell powder can be an eco-friendly adsorbent for Cr(VI) from aqueous solutions.
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spelling pubmed-101332422023-04-28 Rapid adsorptive removal of chromium from wastewater using walnut-derived biosorbents Garg, Rajni Garg, Rishav Sillanpää, Mika Alimuddin Khan, Mohammad Amir Mubarak, Nabisab Mujawar Tan, Yie Hua Sci Rep Article Contamination of water resources by industrial effluents containing heavy metal ions and management of solid waste from agricultural and food industries is a serious issue. This study presents the valorization of waste walnut shells as an effective and environment-friendly biosorbent for sequestrating Cr(VI) from aqueous media. The native walnut shell powder (NWP) was chemically modified with alkali (AWP) and citric acid (CWP) to obtain modified biosorbents with abundant availability of pores as active centers, as confirmed by BET analysis. During batch adsorption studies, the process parameters for Cr(VI) adsorption were optimized at pH 2.0. The adsorption data were fitted to isotherm and kinetic models to compute various adsorption parameters. The adsorption pattern of Cr(VI) was well explained by the Langmuir model suggesting the adsorbate monolayer formation on the surface of the biosorbents. The maximum adsorption capacity, q(m,) for Cr(VI) was achieved for CWP (75.26 mg/g), followed by AWP (69.56 mg/g) and NWP (64.82 mg/g). Treatment with sodium hydroxide and citric acid improved the adsorption efficiency of the biosorbent by 4.5 and 8.2%, respectively. The endothermic and spontaneous adsorption was observed to trail the pseudo-second-order kinetics under optimized process parameters. Thus, the chemically modified walnut shell powder can be an eco-friendly adsorbent for Cr(VI) from aqueous solutions. Nature Publishing Group UK 2023-04-26 /pmc/articles/PMC10133242/ /pubmed/37100812 http://dx.doi.org/10.1038/s41598-023-33843-3 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Garg, Rajni
Garg, Rishav
Sillanpää, Mika
Alimuddin
Khan, Mohammad Amir
Mubarak, Nabisab Mujawar
Tan, Yie Hua
Rapid adsorptive removal of chromium from wastewater using walnut-derived biosorbents
title Rapid adsorptive removal of chromium from wastewater using walnut-derived biosorbents
title_full Rapid adsorptive removal of chromium from wastewater using walnut-derived biosorbents
title_fullStr Rapid adsorptive removal of chromium from wastewater using walnut-derived biosorbents
title_full_unstemmed Rapid adsorptive removal of chromium from wastewater using walnut-derived biosorbents
title_short Rapid adsorptive removal of chromium from wastewater using walnut-derived biosorbents
title_sort rapid adsorptive removal of chromium from wastewater using walnut-derived biosorbents
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10133242/
https://www.ncbi.nlm.nih.gov/pubmed/37100812
http://dx.doi.org/10.1038/s41598-023-33843-3
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