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Synthesis of Oxidant Functionalised Cationic Polymer Hydrogel for Enhanced Removal of Arsenic (III)

A cationic polymer gel (N-[3-(dimethylamino)propyl]acrylamide, methyl chloride quaternary)(DMAPAA-Q gel)-supported oxidising agent (KMnO(4) or K(2)Cr(2)O(7)) was proposed to remove As from water. The gel could adsorb arsenite, As(III), and arsenate, As(V), through the ion exchange method, where the...

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Autores principales: Song, Yu, Gotoh, Takehiko, Nakai, Satoshi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8628796/
https://www.ncbi.nlm.nih.gov/pubmed/34842691
http://dx.doi.org/10.3390/gels7040197
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author Song, Yu
Gotoh, Takehiko
Nakai, Satoshi
author_facet Song, Yu
Gotoh, Takehiko
Nakai, Satoshi
author_sort Song, Yu
collection PubMed
description A cationic polymer gel (N-[3-(dimethylamino)propyl]acrylamide, methyl chloride quaternary)(DMAPAA-Q gel)-supported oxidising agent (KMnO(4) or K(2)Cr(2)O(7)) was proposed to remove As from water. The gel could adsorb arsenite, As(III), and arsenate, As(V), through the ion exchange method, where the oxidising agent oxidised As(III) to As(V). theoretically speaking, the amount of oxidant in the gels can reach 73.7 Mol%. The maximal adsorption capacity of the D-Mn gel (DMAPAA-Q gel carrying MnO(4)(−)) and D-Cr gel (DMAPAA-Q gel carrying Cr(2)O(7)(2−)) for As(III) could reach 200 mg g(−1) and 263 mg g(−1), respectively; moreover, the As(III) removal rate of the gels could still be maintained above 85% in a neutral or weak acid aquatic solution. Studies on the kinetic and adsorption isotherms indicated that the As adsorption by the D-Mn and D-Cr gels was dominated by chemisorption. The thermodynamic parameters of adsorption confirmed that the adsorption was an endothermic process. The removal of As is influenced by the co-existing high-valence anions. Based on these results, the gels were found to be efficient for the As(III) adsorption and could be employed for the As(III) removal from the industrial wastewater.
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spelling pubmed-86287962021-11-30 Synthesis of Oxidant Functionalised Cationic Polymer Hydrogel for Enhanced Removal of Arsenic (III) Song, Yu Gotoh, Takehiko Nakai, Satoshi Gels Article A cationic polymer gel (N-[3-(dimethylamino)propyl]acrylamide, methyl chloride quaternary)(DMAPAA-Q gel)-supported oxidising agent (KMnO(4) or K(2)Cr(2)O(7)) was proposed to remove As from water. The gel could adsorb arsenite, As(III), and arsenate, As(V), through the ion exchange method, where the oxidising agent oxidised As(III) to As(V). theoretically speaking, the amount of oxidant in the gels can reach 73.7 Mol%. The maximal adsorption capacity of the D-Mn gel (DMAPAA-Q gel carrying MnO(4)(−)) and D-Cr gel (DMAPAA-Q gel carrying Cr(2)O(7)(2−)) for As(III) could reach 200 mg g(−1) and 263 mg g(−1), respectively; moreover, the As(III) removal rate of the gels could still be maintained above 85% in a neutral or weak acid aquatic solution. Studies on the kinetic and adsorption isotherms indicated that the As adsorption by the D-Mn and D-Cr gels was dominated by chemisorption. The thermodynamic parameters of adsorption confirmed that the adsorption was an endothermic process. The removal of As is influenced by the co-existing high-valence anions. Based on these results, the gels were found to be efficient for the As(III) adsorption and could be employed for the As(III) removal from the industrial wastewater. MDPI 2021-11-04 /pmc/articles/PMC8628796/ /pubmed/34842691 http://dx.doi.org/10.3390/gels7040197 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Song, Yu
Gotoh, Takehiko
Nakai, Satoshi
Synthesis of Oxidant Functionalised Cationic Polymer Hydrogel for Enhanced Removal of Arsenic (III)
title Synthesis of Oxidant Functionalised Cationic Polymer Hydrogel for Enhanced Removal of Arsenic (III)
title_full Synthesis of Oxidant Functionalised Cationic Polymer Hydrogel for Enhanced Removal of Arsenic (III)
title_fullStr Synthesis of Oxidant Functionalised Cationic Polymer Hydrogel for Enhanced Removal of Arsenic (III)
title_full_unstemmed Synthesis of Oxidant Functionalised Cationic Polymer Hydrogel for Enhanced Removal of Arsenic (III)
title_short Synthesis of Oxidant Functionalised Cationic Polymer Hydrogel for Enhanced Removal of Arsenic (III)
title_sort synthesis of oxidant functionalised cationic polymer hydrogel for enhanced removal of arsenic (iii)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8628796/
https://www.ncbi.nlm.nih.gov/pubmed/34842691
http://dx.doi.org/10.3390/gels7040197
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