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Isopentyl-Sulfide-Impregnated Nano-MnO(2) for the Selective Sorption of Pd(II) from the Leaching Liquor of Ores

Conventional separation methods are not suitable for recovering palladium present in low concentrations in ore leaching solutions. In this study, a novel isopentyl sulfide (S(201))-impregnated α-MnO(2) nanorod adsorbent (BISIN) was prepared, characterized, and applied for the selective adsorption an...

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Autores principales: Wu, Shengjie, Xie, Mingjin, Zhang, Qin, Zhong, Lijiang, Chen, Muhan, Huang, Zhangjie
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6152070/
https://www.ncbi.nlm.nih.gov/pubmed/28684696
http://dx.doi.org/10.3390/molecules22071117
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author Wu, Shengjie
Xie, Mingjin
Zhang, Qin
Zhong, Lijiang
Chen, Muhan
Huang, Zhangjie
author_facet Wu, Shengjie
Xie, Mingjin
Zhang, Qin
Zhong, Lijiang
Chen, Muhan
Huang, Zhangjie
author_sort Wu, Shengjie
collection PubMed
description Conventional separation methods are not suitable for recovering palladium present in low concentrations in ore leaching solutions. In this study, a novel isopentyl sulfide (S(201))-impregnated α-MnO(2) nanorod adsorbent (BISIN) was prepared, characterized, and applied for the selective adsorption and separation of palladium from the leaching liquor of ores. Batch studies were carried out, and the main adsorption parameters were systematically investigated, in addition to the relevant thermodynamic parameters, isotherms, and kinetic models. The thermodynamic parameters reflected the endothermic and spontaneous nature of the adsorption. Moreover, the experimental results indicated that the Langmuir isotherm model fits the palladium adsorption data well and the adsorption was well described by the pseudo-second-order kinetic model. The main adsorption mechanisms of palladium were elucidated at the molecular level by X-ray crystal structure analysis. Thiourea was found to be an excellent desorption agent, and the palladium-thiourea complex was also confirmed by X-ray crystal structure analysis. The results indicated that almost all of the Pd(II) (>99.0%) is adsorbed on BISIN, whereas less than 2% of the adsorbed Pt(IV), Fe(3+), Cu(2+), Ni(2+), and Co(2+) is observed under the optimum conditions. The proposed method can be used for the efficient adsorption and separation of palladium from the leaching liquor of ores.
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spelling pubmed-61520702018-11-13 Isopentyl-Sulfide-Impregnated Nano-MnO(2) for the Selective Sorption of Pd(II) from the Leaching Liquor of Ores Wu, Shengjie Xie, Mingjin Zhang, Qin Zhong, Lijiang Chen, Muhan Huang, Zhangjie Molecules Article Conventional separation methods are not suitable for recovering palladium present in low concentrations in ore leaching solutions. In this study, a novel isopentyl sulfide (S(201))-impregnated α-MnO(2) nanorod adsorbent (BISIN) was prepared, characterized, and applied for the selective adsorption and separation of palladium from the leaching liquor of ores. Batch studies were carried out, and the main adsorption parameters were systematically investigated, in addition to the relevant thermodynamic parameters, isotherms, and kinetic models. The thermodynamic parameters reflected the endothermic and spontaneous nature of the adsorption. Moreover, the experimental results indicated that the Langmuir isotherm model fits the palladium adsorption data well and the adsorption was well described by the pseudo-second-order kinetic model. The main adsorption mechanisms of palladium were elucidated at the molecular level by X-ray crystal structure analysis. Thiourea was found to be an excellent desorption agent, and the palladium-thiourea complex was also confirmed by X-ray crystal structure analysis. The results indicated that almost all of the Pd(II) (>99.0%) is adsorbed on BISIN, whereas less than 2% of the adsorbed Pt(IV), Fe(3+), Cu(2+), Ni(2+), and Co(2+) is observed under the optimum conditions. The proposed method can be used for the efficient adsorption and separation of palladium from the leaching liquor of ores. MDPI 2017-07-06 /pmc/articles/PMC6152070/ /pubmed/28684696 http://dx.doi.org/10.3390/molecules22071117 Text en © 2017 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
Wu, Shengjie
Xie, Mingjin
Zhang, Qin
Zhong, Lijiang
Chen, Muhan
Huang, Zhangjie
Isopentyl-Sulfide-Impregnated Nano-MnO(2) for the Selective Sorption of Pd(II) from the Leaching Liquor of Ores
title Isopentyl-Sulfide-Impregnated Nano-MnO(2) for the Selective Sorption of Pd(II) from the Leaching Liquor of Ores
title_full Isopentyl-Sulfide-Impregnated Nano-MnO(2) for the Selective Sorption of Pd(II) from the Leaching Liquor of Ores
title_fullStr Isopentyl-Sulfide-Impregnated Nano-MnO(2) for the Selective Sorption of Pd(II) from the Leaching Liquor of Ores
title_full_unstemmed Isopentyl-Sulfide-Impregnated Nano-MnO(2) for the Selective Sorption of Pd(II) from the Leaching Liquor of Ores
title_short Isopentyl-Sulfide-Impregnated Nano-MnO(2) for the Selective Sorption of Pd(II) from the Leaching Liquor of Ores
title_sort isopentyl-sulfide-impregnated nano-mno(2) for the selective sorption of pd(ii) from the leaching liquor of ores
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6152070/
https://www.ncbi.nlm.nih.gov/pubmed/28684696
http://dx.doi.org/10.3390/molecules22071117
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