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Selective Recovery of Gold from Electronic Waste by New Efficient Type of Sorbent

Modular connectors are applied by computer users, and they can be metallic secondary sources containing metals such as gold and copper. Because gold is a micro-component, the solution obtained after the pin digestion contains a low concentration of gold(III) ions, and efficient and selective sorbent...

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Autores principales: Wójcik, Grzegorz, Górska-Parat, Magdalena, Hubicki, Zbigniew, Zinkowska, Karolina
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9917452/
https://www.ncbi.nlm.nih.gov/pubmed/36769929
http://dx.doi.org/10.3390/ma16030924
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author Wójcik, Grzegorz
Górska-Parat, Magdalena
Hubicki, Zbigniew
Zinkowska, Karolina
author_facet Wójcik, Grzegorz
Górska-Parat, Magdalena
Hubicki, Zbigniew
Zinkowska, Karolina
author_sort Wójcik, Grzegorz
collection PubMed
description Modular connectors are applied by computer users, and they can be metallic secondary sources containing metals such as gold and copper. Because gold is a micro-component, the solution obtained after the pin digestion contains a low concentration of gold(III) ions, and efficient and selective sorbent should be used for gold(III) ion recovery. The selective removal of small amounts of gold(III) from 0.001–6 M hydrochloric acid solutions using pure and solvent-impregnated macroporous polystyrene crosslinked with divinylbenzene sorbents (Purolite MN 202 and Cyanex 272) is presented. Gold(III) ions were recovered effectively from the chloride solution after the digestion of the modular connector RJ 45 (8P8C) using Purolite MN 202 after the impregnation process. The dependence of the recovery percentage (R%) of gold(III) on the contact time was determined. The highest value of gold(III) ion sorption capacity (259.45 mg·g(−1)) was obtained in 0.001 M HCl for Purolite MN202 after the Cyanex 272 impregnation. The results can be applied to gold recovery from e-waste. The presented method of gold recovery does not generate nitrogen oxides and does not require the use of cyanides.
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spelling pubmed-99174522023-02-11 Selective Recovery of Gold from Electronic Waste by New Efficient Type of Sorbent Wójcik, Grzegorz Górska-Parat, Magdalena Hubicki, Zbigniew Zinkowska, Karolina Materials (Basel) Article Modular connectors are applied by computer users, and they can be metallic secondary sources containing metals such as gold and copper. Because gold is a micro-component, the solution obtained after the pin digestion contains a low concentration of gold(III) ions, and efficient and selective sorbent should be used for gold(III) ion recovery. The selective removal of small amounts of gold(III) from 0.001–6 M hydrochloric acid solutions using pure and solvent-impregnated macroporous polystyrene crosslinked with divinylbenzene sorbents (Purolite MN 202 and Cyanex 272) is presented. Gold(III) ions were recovered effectively from the chloride solution after the digestion of the modular connector RJ 45 (8P8C) using Purolite MN 202 after the impregnation process. The dependence of the recovery percentage (R%) of gold(III) on the contact time was determined. The highest value of gold(III) ion sorption capacity (259.45 mg·g(−1)) was obtained in 0.001 M HCl for Purolite MN202 after the Cyanex 272 impregnation. The results can be applied to gold recovery from e-waste. The presented method of gold recovery does not generate nitrogen oxides and does not require the use of cyanides. MDPI 2023-01-18 /pmc/articles/PMC9917452/ /pubmed/36769929 http://dx.doi.org/10.3390/ma16030924 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wójcik, Grzegorz
Górska-Parat, Magdalena
Hubicki, Zbigniew
Zinkowska, Karolina
Selective Recovery of Gold from Electronic Waste by New Efficient Type of Sorbent
title Selective Recovery of Gold from Electronic Waste by New Efficient Type of Sorbent
title_full Selective Recovery of Gold from Electronic Waste by New Efficient Type of Sorbent
title_fullStr Selective Recovery of Gold from Electronic Waste by New Efficient Type of Sorbent
title_full_unstemmed Selective Recovery of Gold from Electronic Waste by New Efficient Type of Sorbent
title_short Selective Recovery of Gold from Electronic Waste by New Efficient Type of Sorbent
title_sort selective recovery of gold from electronic waste by new efficient type of sorbent
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9917452/
https://www.ncbi.nlm.nih.gov/pubmed/36769929
http://dx.doi.org/10.3390/ma16030924
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