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Rapid Removal of Acid Red 88 by Zeolite/Chitosan Hydrogel in Aqueous Solution

In the present study, we developed a new adsorbent product with zeolite crosslinked chitosan (ZL–CH hydrogel) to remove acid red 88 (AR88) in an aqueous solution. The effects of several factors, such as the comparison of ZL–CH hydrogel and the absence of chitosan, pH, adsorbent dosage, initial AR88...

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Autores principales: Hidayat, Endar, Harada, Hiroyuki, Mitoma, Yoshiharu, Yonemura, Seiichiro, A Halem, Hadi Imran
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8912896/
https://www.ncbi.nlm.nih.gov/pubmed/35267716
http://dx.doi.org/10.3390/polym14050893
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author Hidayat, Endar
Harada, Hiroyuki
Mitoma, Yoshiharu
Yonemura, Seiichiro
A Halem, Hadi Imran
author_facet Hidayat, Endar
Harada, Hiroyuki
Mitoma, Yoshiharu
Yonemura, Seiichiro
A Halem, Hadi Imran
author_sort Hidayat, Endar
collection PubMed
description In the present study, we developed a new adsorbent product with zeolite crosslinked chitosan (ZL–CH hydrogel) to remove acid red 88 (AR88) in an aqueous solution. The effects of several factors, such as the comparison of ZL–CH hydrogel and the absence of chitosan, pH, adsorbent dosage, initial AR88 concentration, contact time, and ion strength, were determined. Obtained results showed that ZL–CH hydrogel improved AR88 removal compared to the absence of chitosan, with an adsorption capacity of 332.48 mg/g in equilibrium time of 1 min, and adding ionic strength had no significant effect. However, with optimal conditions at pH 2.0, dry ZL–CH became hydrogel due to protonation of amino and hydroxyl groups through hydrogen bonds in the AR88 solution. Volume fraction and interaction force decreased with increasing porosity, leading to an increase in adsorption capacity and swelling ratio. Experimental data of the adsorption process showed the Freundlich isotherm model. The equilibrium for adsorption and swelling kinetics studies showed and fitted a pseudo-second-order model. NaOH was successful as a desorbing agent with 93.8%, and it followed the pseudo-second-order kinetics model. The recycling process indicates great potential for AR88 removal.
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spelling pubmed-89128962022-03-11 Rapid Removal of Acid Red 88 by Zeolite/Chitosan Hydrogel in Aqueous Solution Hidayat, Endar Harada, Hiroyuki Mitoma, Yoshiharu Yonemura, Seiichiro A Halem, Hadi Imran Polymers (Basel) Article In the present study, we developed a new adsorbent product with zeolite crosslinked chitosan (ZL–CH hydrogel) to remove acid red 88 (AR88) in an aqueous solution. The effects of several factors, such as the comparison of ZL–CH hydrogel and the absence of chitosan, pH, adsorbent dosage, initial AR88 concentration, contact time, and ion strength, were determined. Obtained results showed that ZL–CH hydrogel improved AR88 removal compared to the absence of chitosan, with an adsorption capacity of 332.48 mg/g in equilibrium time of 1 min, and adding ionic strength had no significant effect. However, with optimal conditions at pH 2.0, dry ZL–CH became hydrogel due to protonation of amino and hydroxyl groups through hydrogen bonds in the AR88 solution. Volume fraction and interaction force decreased with increasing porosity, leading to an increase in adsorption capacity and swelling ratio. Experimental data of the adsorption process showed the Freundlich isotherm model. The equilibrium for adsorption and swelling kinetics studies showed and fitted a pseudo-second-order model. NaOH was successful as a desorbing agent with 93.8%, and it followed the pseudo-second-order kinetics model. The recycling process indicates great potential for AR88 removal. MDPI 2022-02-24 /pmc/articles/PMC8912896/ /pubmed/35267716 http://dx.doi.org/10.3390/polym14050893 Text en © 2022 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
Hidayat, Endar
Harada, Hiroyuki
Mitoma, Yoshiharu
Yonemura, Seiichiro
A Halem, Hadi Imran
Rapid Removal of Acid Red 88 by Zeolite/Chitosan Hydrogel in Aqueous Solution
title Rapid Removal of Acid Red 88 by Zeolite/Chitosan Hydrogel in Aqueous Solution
title_full Rapid Removal of Acid Red 88 by Zeolite/Chitosan Hydrogel in Aqueous Solution
title_fullStr Rapid Removal of Acid Red 88 by Zeolite/Chitosan Hydrogel in Aqueous Solution
title_full_unstemmed Rapid Removal of Acid Red 88 by Zeolite/Chitosan Hydrogel in Aqueous Solution
title_short Rapid Removal of Acid Red 88 by Zeolite/Chitosan Hydrogel in Aqueous Solution
title_sort rapid removal of acid red 88 by zeolite/chitosan hydrogel in aqueous solution
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8912896/
https://www.ncbi.nlm.nih.gov/pubmed/35267716
http://dx.doi.org/10.3390/polym14050893
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