Adsorption and Desorption Behavior of Ectoine Using Dowex<sup>®</sup> HCR-S Ion-Exchange Resin

Dowex<sup>®</sup> HCR-S ion-exchange resin was used to adsorb ectoine in a batch system under varying operation conditions in terms of contact time, temperature, pH value, initial concentration of ectoine, and type of salt. Six adsorption isotherm models (Langmuir, Freundlich, Temkin, Du...

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Autores principales:	Yu-Chi Wu, Yu-Hong Wei, Ho-Shing Wu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	ectoine ion exchange separation and purification kinetic and isotherm simulation Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/985e9ad129cc410da059e303a3b9b189
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spelling	oai:doaj.org-article:985e9ad129cc410da059e303a3b9b1892021-11-25T18:51:58ZAdsorption and Desorption Behavior of Ectoine Using Dowex<sup>®</sup> HCR-S Ion-Exchange Resin10.3390/pr91120682227-9717https://doaj.org/article/985e9ad129cc410da059e303a3b9b1892021-11-01T00:00:00Zhttps://www.mdpi.com/2227-9717/9/11/2068https://doaj.org/toc/2227-9717Dowex<sup>®</sup> HCR-S ion-exchange resin was used to adsorb ectoine in a batch system under varying operation conditions in terms of contact time, temperature, pH value, initial concentration of ectoine, and type of salt. Six adsorption isotherm models (Langmuir, Freundlich, Temkin, Dubinin–Radushkevich, Sips, and Redlich–Peterson) and three kinetic models (pseudo-first-order, pseudo-second-order, and intraparticle diffusion) were used to investigate the ectoine adsorption mechanism of ion-exchange resin. According to the experimental results, the mechanism of ectoine adsorption using an ion exchanger includes the ion-exchange reaction and physisorption. Both the Langmuir and Freundlich models were found to have a high fitting. For the kinetic analysis, the pseudo-second-order and intraparticle diffusion models were suitable to describe the ectoine adsorption. Dowex<sup>®</sup> HCR-S resin has an average saturated adsorption capacity of 0.57 g/g and 93.6% of ectoine adsorption at 25~65 °C, with an initial concentration of 125 g/L. By changing the pH of the environment using NaOH solution, the adsorbed ectoine on the ion-exchange resin can be desorbed to 87.7%.Yu-Chi WuYu-Hong WeiHo-Shing WuMDPI AGarticleectoineion exchangeseparation and purificationkinetic and isotherm simulationChemical technologyTP1-1185ChemistryQD1-999ENProcesses, Vol 9, Iss 2068, p 2068 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	ectoine ion exchange separation and purification kinetic and isotherm simulation Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	ectoine ion exchange separation and purification kinetic and isotherm simulation Chemical technology TP1-1185 Chemistry QD1-999 Yu-Chi Wu Yu-Hong Wei Ho-Shing Wu Adsorption and Desorption Behavior of Ectoine Using Dowex<sup>®</sup> HCR-S Ion-Exchange Resin
description	Dowex<sup>®</sup> HCR-S ion-exchange resin was used to adsorb ectoine in a batch system under varying operation conditions in terms of contact time, temperature, pH value, initial concentration of ectoine, and type of salt. Six adsorption isotherm models (Langmuir, Freundlich, Temkin, Dubinin–Radushkevich, Sips, and Redlich–Peterson) and three kinetic models (pseudo-first-order, pseudo-second-order, and intraparticle diffusion) were used to investigate the ectoine adsorption mechanism of ion-exchange resin. According to the experimental results, the mechanism of ectoine adsorption using an ion exchanger includes the ion-exchange reaction and physisorption. Both the Langmuir and Freundlich models were found to have a high fitting. For the kinetic analysis, the pseudo-second-order and intraparticle diffusion models were suitable to describe the ectoine adsorption. Dowex<sup>®</sup> HCR-S resin has an average saturated adsorption capacity of 0.57 g/g and 93.6% of ectoine adsorption at 25~65 °C, with an initial concentration of 125 g/L. By changing the pH of the environment using NaOH solution, the adsorbed ectoine on the ion-exchange resin can be desorbed to 87.7%.
format	article
author	Yu-Chi Wu Yu-Hong Wei Ho-Shing Wu
author_facet	Yu-Chi Wu Yu-Hong Wei Ho-Shing Wu
author_sort	Yu-Chi Wu
title	Adsorption and Desorption Behavior of Ectoine Using Dowex<sup>®</sup> HCR-S Ion-Exchange Resin
title_short	Adsorption and Desorption Behavior of Ectoine Using Dowex<sup>®</sup> HCR-S Ion-Exchange Resin
title_full	Adsorption and Desorption Behavior of Ectoine Using Dowex<sup>®</sup> HCR-S Ion-Exchange Resin
title_fullStr	Adsorption and Desorption Behavior of Ectoine Using Dowex<sup>®</sup> HCR-S Ion-Exchange Resin
title_full_unstemmed	Adsorption and Desorption Behavior of Ectoine Using Dowex<sup>®</sup> HCR-S Ion-Exchange Resin
title_sort	adsorption and desorption behavior of ectoine using dowex<sup>®</sup> hcr-s ion-exchange resin
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/985e9ad129cc410da059e303a3b9b189
work_keys_str_mv	AT yuchiwu adsorptionanddesorptionbehaviorofectoineusingdowexsupsuphcrsionexchangeresin AT yuhongwei adsorptionanddesorptionbehaviorofectoineusingdowexsupsuphcrsionexchangeresin AT hoshingwu adsorptionanddesorptionbehaviorofectoineusingdowexsupsuphcrsionexchangeresin
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Adsorption and Desorption Behavior of Ectoine Using Dowex<sup>®</sup> HCR-S Ion-Exchange Resin

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