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Selective Adsorption, Reduction, and Separation of Au(III) from Aqueous Solution with Amine-Type Non-Woven Fabric Adsorbents

Herein, adsorption, separation, and reduction of Au(III) from its aqueous solution were studied with different amine-type, non-woven fabric (NF) adsorbents fabricated with radiation-induced graft polymerization. The adsorbents exhibited different adsorption capacities of Au(III) over a concentration...

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Autores principales: Huang, Chen, Xu, Xiao, Ao, Junxuan, Ma, Lin, Ye, Feng, Wang, Ziqiang, Xu, Lu, Zhao, Xiaoyan, Ma, Hongjuan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7372446/
https://www.ncbi.nlm.nih.gov/pubmed/32630807
http://dx.doi.org/10.3390/ma13132958
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author Huang, Chen
Xu, Xiao
Ao, Junxuan
Ma, Lin
Ye, Feng
Wang, Ziqiang
Xu, Lu
Zhao, Xiaoyan
Ma, Hongjuan
author_facet Huang, Chen
Xu, Xiao
Ao, Junxuan
Ma, Lin
Ye, Feng
Wang, Ziqiang
Xu, Lu
Zhao, Xiaoyan
Ma, Hongjuan
author_sort Huang, Chen
collection PubMed
description Herein, adsorption, separation, and reduction of Au(III) from its aqueous solution were studied with different amine-type, non-woven fabric (NF) adsorbents fabricated with radiation-induced graft polymerization. The adsorbents exhibited different adsorption capacities of Au(III) over a concentration range of hydrochloric acid (HCl) from 5 mM to 5 M, and the diethylamine (DEA)-type adsorbent performed best under all test conditions. The DEA-type adsorbent was inert toward other metal ions, including Cu(II), Pb(II), Ni(II), Zn(II) and Li(I), within the fixed concentration range of HCl. Flow-through adsorption tests indicated DEA-type adsorbent exhibited a rapid recovery and high adsorption capacity of 3.23 mmol/g. Meanwhile, DEA-type adsorbent also exhibited high selectivity and rapid extraction for Au(III) from its mixed solution with Pt(IV) and Pd(II). After adsorption, the reduction of Au(III) was confirmed by XRD spectra, TEM, and digital micrograph images. The results indicated that nano-sized Au particles were mainly concentrated on the adsorbent in 5 mM HCl solution. In 1 M HCl solution, not only nano-sized Au particles were found, but also micro-size Au plates precipitation occurred. This study provides a novel material for selective and efficient gold uptake from aqueous solution.
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spelling pubmed-73724462020-08-05 Selective Adsorption, Reduction, and Separation of Au(III) from Aqueous Solution with Amine-Type Non-Woven Fabric Adsorbents Huang, Chen Xu, Xiao Ao, Junxuan Ma, Lin Ye, Feng Wang, Ziqiang Xu, Lu Zhao, Xiaoyan Ma, Hongjuan Materials (Basel) Article Herein, adsorption, separation, and reduction of Au(III) from its aqueous solution were studied with different amine-type, non-woven fabric (NF) adsorbents fabricated with radiation-induced graft polymerization. The adsorbents exhibited different adsorption capacities of Au(III) over a concentration range of hydrochloric acid (HCl) from 5 mM to 5 M, and the diethylamine (DEA)-type adsorbent performed best under all test conditions. The DEA-type adsorbent was inert toward other metal ions, including Cu(II), Pb(II), Ni(II), Zn(II) and Li(I), within the fixed concentration range of HCl. Flow-through adsorption tests indicated DEA-type adsorbent exhibited a rapid recovery and high adsorption capacity of 3.23 mmol/g. Meanwhile, DEA-type adsorbent also exhibited high selectivity and rapid extraction for Au(III) from its mixed solution with Pt(IV) and Pd(II). After adsorption, the reduction of Au(III) was confirmed by XRD spectra, TEM, and digital micrograph images. The results indicated that nano-sized Au particles were mainly concentrated on the adsorbent in 5 mM HCl solution. In 1 M HCl solution, not only nano-sized Au particles were found, but also micro-size Au plates precipitation occurred. This study provides a novel material for selective and efficient gold uptake from aqueous solution. MDPI 2020-07-02 /pmc/articles/PMC7372446/ /pubmed/32630807 http://dx.doi.org/10.3390/ma13132958 Text en © 2020 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Huang, Chen
Xu, Xiao
Ao, Junxuan
Ma, Lin
Ye, Feng
Wang, Ziqiang
Xu, Lu
Zhao, Xiaoyan
Ma, Hongjuan
Selective Adsorption, Reduction, and Separation of Au(III) from Aqueous Solution with Amine-Type Non-Woven Fabric Adsorbents
title Selective Adsorption, Reduction, and Separation of Au(III) from Aqueous Solution with Amine-Type Non-Woven Fabric Adsorbents
title_full Selective Adsorption, Reduction, and Separation of Au(III) from Aqueous Solution with Amine-Type Non-Woven Fabric Adsorbents
title_fullStr Selective Adsorption, Reduction, and Separation of Au(III) from Aqueous Solution with Amine-Type Non-Woven Fabric Adsorbents
title_full_unstemmed Selective Adsorption, Reduction, and Separation of Au(III) from Aqueous Solution with Amine-Type Non-Woven Fabric Adsorbents
title_short Selective Adsorption, Reduction, and Separation of Au(III) from Aqueous Solution with Amine-Type Non-Woven Fabric Adsorbents
title_sort selective adsorption, reduction, and separation of au(iii) from aqueous solution with amine-type non-woven fabric adsorbents
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7372446/
https://www.ncbi.nlm.nih.gov/pubmed/32630807
http://dx.doi.org/10.3390/ma13132958
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