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Partially reduced graphene oxide and chitosan nanohybrid membranes for selective retention of divalent cations

A tremendous quantity of brackish water with a high proportion of divalent cations is in great need of water softening. Layer-stacked graphene oxide membranes show potential in membrane processing due to their molecular sieving properties, but show poor selective retention of cations due to unstable...

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Detalles Bibliográficos
Autores principales: Wei, Yangyang, Wang, Jian, Li, Hao, Zhao, Man, Zhang, Huifeng, Guan, Yipeng, Huang, Hai, Mi, Baoxia, Zhang, Yushan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9079788/
https://www.ncbi.nlm.nih.gov/pubmed/35539355
http://dx.doi.org/10.1039/c8ra01916a
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author Wei, Yangyang
Wang, Jian
Li, Hao
Zhao, Man
Zhang, Huifeng
Guan, Yipeng
Huang, Hai
Mi, Baoxia
Zhang, Yushan
author_facet Wei, Yangyang
Wang, Jian
Li, Hao
Zhao, Man
Zhang, Huifeng
Guan, Yipeng
Huang, Hai
Mi, Baoxia
Zhang, Yushan
author_sort Wei, Yangyang
collection PubMed
description A tremendous quantity of brackish water with a high proportion of divalent cations is in great need of water softening. Layer-stacked graphene oxide membranes show potential in membrane processing due to their molecular sieving properties, but show poor selective retention of cations due to unstable interlayer spacing and electrostatic interaction. In this study, a partially reduced graphene oxide (prGO) and chitosan (CS) nanohybrid membrane (prGO–CS) was fabricated to achieve the selective retention of divalent cations by adjusting the configuration and controlling the surface charge. The prGO–CS membrane, which included a CS skin and embedded prGO sheets, showed a performance boost of 98.0% rejection of Mg(2+) and 95.5% rejection of Ca(2+) when compared with a CS membrane. The membrane showed good water softening performance for brackish water under low operation pressure with a high Na(+)/Mg(2+) selectivity of 33.8. The excellent performance was attributed to the dense structure and positive charge of prGO–CS.
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spelling pubmed-90797882022-05-09 Partially reduced graphene oxide and chitosan nanohybrid membranes for selective retention of divalent cations Wei, Yangyang Wang, Jian Li, Hao Zhao, Man Zhang, Huifeng Guan, Yipeng Huang, Hai Mi, Baoxia Zhang, Yushan RSC Adv Chemistry A tremendous quantity of brackish water with a high proportion of divalent cations is in great need of water softening. Layer-stacked graphene oxide membranes show potential in membrane processing due to their molecular sieving properties, but show poor selective retention of cations due to unstable interlayer spacing and electrostatic interaction. In this study, a partially reduced graphene oxide (prGO) and chitosan (CS) nanohybrid membrane (prGO–CS) was fabricated to achieve the selective retention of divalent cations by adjusting the configuration and controlling the surface charge. The prGO–CS membrane, which included a CS skin and embedded prGO sheets, showed a performance boost of 98.0% rejection of Mg(2+) and 95.5% rejection of Ca(2+) when compared with a CS membrane. The membrane showed good water softening performance for brackish water under low operation pressure with a high Na(+)/Mg(2+) selectivity of 33.8. The excellent performance was attributed to the dense structure and positive charge of prGO–CS. The Royal Society of Chemistry 2018-04-11 /pmc/articles/PMC9079788/ /pubmed/35539355 http://dx.doi.org/10.1039/c8ra01916a Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Wei, Yangyang
Wang, Jian
Li, Hao
Zhao, Man
Zhang, Huifeng
Guan, Yipeng
Huang, Hai
Mi, Baoxia
Zhang, Yushan
Partially reduced graphene oxide and chitosan nanohybrid membranes for selective retention of divalent cations
title Partially reduced graphene oxide and chitosan nanohybrid membranes for selective retention of divalent cations
title_full Partially reduced graphene oxide and chitosan nanohybrid membranes for selective retention of divalent cations
title_fullStr Partially reduced graphene oxide and chitosan nanohybrid membranes for selective retention of divalent cations
title_full_unstemmed Partially reduced graphene oxide and chitosan nanohybrid membranes for selective retention of divalent cations
title_short Partially reduced graphene oxide and chitosan nanohybrid membranes for selective retention of divalent cations
title_sort partially reduced graphene oxide and chitosan nanohybrid membranes for selective retention of divalent cations
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9079788/
https://www.ncbi.nlm.nih.gov/pubmed/35539355
http://dx.doi.org/10.1039/c8ra01916a
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