Polyethyleneimine impregnated alginate capsule as a high capacity sorbent for the recovery of monovalent and trivalent gold

Abstract For the first time, a polyethyleneimine-impregnated alginate capsule (PEIIAC) with a high adsorption capacity is developed for the recovery of monovalent and trivalent gold from an acidic solution. The strategy results in a new type of adsorbent, polyethyleneimine impregnated alginate capsu...

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Autores principales:	Yub Raj Dangi, John Kwame Bediako, Xiaoyu Lin, Jong-Won Choi, Che-Ryong Lim, Myung-Hee Song, Minhee Han, Yeoung-Sang Yun
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ee741f60fd3f4e3f809c75d96ff9adee
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spelling	oai:doaj.org-article:ee741f60fd3f4e3f809c75d96ff9adee2021-12-02T17:41:17ZPolyethyleneimine impregnated alginate capsule as a high capacity sorbent for the recovery of monovalent and trivalent gold10.1038/s41598-021-97228-02045-2322https://doaj.org/article/ee741f60fd3f4e3f809c75d96ff9adee2021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-97228-0https://doaj.org/toc/2045-2322Abstract For the first time, a polyethyleneimine-impregnated alginate capsule (PEIIAC) with a high adsorption capacity is developed for the recovery of monovalent and trivalent gold from an acidic solution. The strategy results in a new type of adsorbent, polyethyleneimine impregnated alginate capsule (PEIIAC) with a core–shell structure having a large number of amine groups as cationic binding site, facilitating maximum uptake of anionic auric chloride. The maximum uptake of PEIIAC was 3078 and 929 mg/g for Au (III) and Au (I), respectively, are recordable compared to other reported adsorbents to date. The as-prepared material was executed to check the sorption efficacy for Au (III) and Au (I) in the pH range of 1–12. With an increment in pH, the uptake capacity for Au (III) increased, while the uptake capacity for Au (I) decreased. The FTIR, XRD, and XPS studies revealed that the gold adsorption mechanism includes ionic interactions and reduction, wherein the amine, hydroxyl, and carboxyl groups are involved. The capsule showed a higher adsorption efficiency than other reported sorbents, making the material applicable in acidic solutions for the recovery of Au (I) and Au (III).Yub Raj DangiJohn Kwame BediakoXiaoyu LinJong-Won ChoiChe-Ryong LimMyung-Hee SongMinhee HanYeoung-Sang YunNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yub Raj Dangi John Kwame Bediako Xiaoyu Lin Jong-Won Choi Che-Ryong Lim Myung-Hee Song Minhee Han Yeoung-Sang Yun Polyethyleneimine impregnated alginate capsule as a high capacity sorbent for the recovery of monovalent and trivalent gold
description	Abstract For the first time, a polyethyleneimine-impregnated alginate capsule (PEIIAC) with a high adsorption capacity is developed for the recovery of monovalent and trivalent gold from an acidic solution. The strategy results in a new type of adsorbent, polyethyleneimine impregnated alginate capsule (PEIIAC) with a core–shell structure having a large number of amine groups as cationic binding site, facilitating maximum uptake of anionic auric chloride. The maximum uptake of PEIIAC was 3078 and 929 mg/g for Au (III) and Au (I), respectively, are recordable compared to other reported adsorbents to date. The as-prepared material was executed to check the sorption efficacy for Au (III) and Au (I) in the pH range of 1–12. With an increment in pH, the uptake capacity for Au (III) increased, while the uptake capacity for Au (I) decreased. The FTIR, XRD, and XPS studies revealed that the gold adsorption mechanism includes ionic interactions and reduction, wherein the amine, hydroxyl, and carboxyl groups are involved. The capsule showed a higher adsorption efficiency than other reported sorbents, making the material applicable in acidic solutions for the recovery of Au (I) and Au (III).
format	article
author	Yub Raj Dangi John Kwame Bediako Xiaoyu Lin Jong-Won Choi Che-Ryong Lim Myung-Hee Song Minhee Han Yeoung-Sang Yun
author_facet	Yub Raj Dangi John Kwame Bediako Xiaoyu Lin Jong-Won Choi Che-Ryong Lim Myung-Hee Song Minhee Han Yeoung-Sang Yun
author_sort	Yub Raj Dangi
title	Polyethyleneimine impregnated alginate capsule as a high capacity sorbent for the recovery of monovalent and trivalent gold
title_short	Polyethyleneimine impregnated alginate capsule as a high capacity sorbent for the recovery of monovalent and trivalent gold
title_full	Polyethyleneimine impregnated alginate capsule as a high capacity sorbent for the recovery of monovalent and trivalent gold
title_fullStr	Polyethyleneimine impregnated alginate capsule as a high capacity sorbent for the recovery of monovalent and trivalent gold
title_full_unstemmed	Polyethyleneimine impregnated alginate capsule as a high capacity sorbent for the recovery of monovalent and trivalent gold
title_sort	polyethyleneimine impregnated alginate capsule as a high capacity sorbent for the recovery of monovalent and trivalent gold
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/ee741f60fd3f4e3f809c75d96ff9adee
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Polyethyleneimine impregnated alginate capsule as a high capacity sorbent for the recovery of monovalent and trivalent gold

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