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Preparation of diglycolamide polymer modified silica and its application as adsorbent for rare earth ions

Three novel diglycolamide monomers were synthesized and polymerized on silica. The diglycolamide polymer grafted silica were used as adsorbents for rare earth ions. The effects of acid concentration, structure of monomer, initial solution concentration, contact time and coexisting ions on adsorption...

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Detalles Bibliográficos
Autores principales: Liu, Zhe, Liu, Yu, Gong, Aijun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Taylor & Francis 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6327932/
https://www.ncbi.nlm.nih.gov/pubmed/30651724
http://dx.doi.org/10.1080/15685551.2018.1564425
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author Liu, Zhe
Liu, Yu
Gong, Aijun
author_facet Liu, Zhe
Liu, Yu
Gong, Aijun
author_sort Liu, Zhe
collection PubMed
description Three novel diglycolamide monomers were synthesized and polymerized on silica. The diglycolamide polymer grafted silica were used as adsorbents for rare earth ions. The effects of acid concentration, structure of monomer, initial solution concentration, contact time and coexisting ions on adsorption of rare earth ions were investigated in detail. It was shown that the adsorption capacity increased with increasing acid concentration. Three adsorbents exhibited selectivity for middle and heavy rare earth over light rare earth in different extent. The adsorbent prepared from the monomer having the largest alkyl substituent showed the lowest adsorption capacity but the highest selectivity for different rare earth elements (REEs). Adsorption data were well fitted to the Langmuir isotherm and pseudo-second-order models. The presence of high concentrations (100 fold) of coexisting metal ions, K(I), Cr(II), Cu(II) or Fe(III), does not decrease the adsorption for rare earth ions seriously.
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spelling pubmed-63279322019-01-16 Preparation of diglycolamide polymer modified silica and its application as adsorbent for rare earth ions Liu, Zhe Liu, Yu Gong, Aijun Des Monomers Polym Article Three novel diglycolamide monomers were synthesized and polymerized on silica. The diglycolamide polymer grafted silica were used as adsorbents for rare earth ions. The effects of acid concentration, structure of monomer, initial solution concentration, contact time and coexisting ions on adsorption of rare earth ions were investigated in detail. It was shown that the adsorption capacity increased with increasing acid concentration. Three adsorbents exhibited selectivity for middle and heavy rare earth over light rare earth in different extent. The adsorbent prepared from the monomer having the largest alkyl substituent showed the lowest adsorption capacity but the highest selectivity for different rare earth elements (REEs). Adsorption data were well fitted to the Langmuir isotherm and pseudo-second-order models. The presence of high concentrations (100 fold) of coexisting metal ions, K(I), Cr(II), Cu(II) or Fe(III), does not decrease the adsorption for rare earth ions seriously. Taylor & Francis 2019-01-05 /pmc/articles/PMC6327932/ /pubmed/30651724 http://dx.doi.org/10.1080/15685551.2018.1564425 Text en © 2019 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. http://creativecommons.org/licenses/by/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Article
Liu, Zhe
Liu, Yu
Gong, Aijun
Preparation of diglycolamide polymer modified silica and its application as adsorbent for rare earth ions
title Preparation of diglycolamide polymer modified silica and its application as adsorbent for rare earth ions
title_full Preparation of diglycolamide polymer modified silica and its application as adsorbent for rare earth ions
title_fullStr Preparation of diglycolamide polymer modified silica and its application as adsorbent for rare earth ions
title_full_unstemmed Preparation of diglycolamide polymer modified silica and its application as adsorbent for rare earth ions
title_short Preparation of diglycolamide polymer modified silica and its application as adsorbent for rare earth ions
title_sort preparation of diglycolamide polymer modified silica and its application as adsorbent for rare earth ions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6327932/
https://www.ncbi.nlm.nih.gov/pubmed/30651724
http://dx.doi.org/10.1080/15685551.2018.1564425
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