Precious metals recovery from aqueous solutions using a new adsorbent material

Abstract Platinum group metals (PGMs) palladium, platinum, and ruthenium represent the key materials for automotive exhaust gas treatment. Since there are no adequate alternatives, the importance of these metals for the automotive industry is steadily rising. The high value of PGMs in spent catalyst...

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Autores principales:	Oana Grad, Mihaela Ciopec, Adina Negrea, Narcis Duțeanu, Gabriela Vlase, Petru Negrea, Camelia Dumitrescu, Titus Vlase, Raluca Vodă
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d42a581d076c4b2bb340a2e1297278e7
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spelling	oai:doaj.org-article:d42a581d076c4b2bb340a2e1297278e72021-12-02T11:50:40ZPrecious metals recovery from aqueous solutions using a new adsorbent material10.1038/s41598-021-81680-z2045-2322https://doaj.org/article/d42a581d076c4b2bb340a2e1297278e72021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-81680-zhttps://doaj.org/toc/2045-2322Abstract Platinum group metals (PGMs) palladium, platinum, and ruthenium represent the key materials for automotive exhaust gas treatment. Since there are no adequate alternatives, the importance of these metals for the automotive industry is steadily rising. The high value of PGMs in spent catalysts justifies their recycling. Therefore, it is really important to recovery platinum group metals from aqueous solutions. Of the many PGMs recovery procedures, adsorption is a process with a good efficiency, but an important role is played by the adsorbent material used into the process. In order to improve the adsorption properties of materials were developed new methods for chemical modification of the solid supports, through functionalization with different extractants. In present paper a new adsorbent material (Chitosan-DB18C6) was used for PGMs recovery. The new adsorbent material was produced by impregnating Chitosan with dibenzo-18-crown-6-ether using Solvent Impregnated Resin (SIR) method. The crown ethers were chosen as extractant due to their known ability to bind metallic ions, whether they are symmetrically or unsymmetrically substituted. In order to determine the PGMs recovery efficiency for new prepared adsorbent material the equilibrium and kinetic studies were performed. Also, to study the PGMs adsorption mechanism the experimental data were modelled using pseudo-first-order and pseudo-second order kinetic models. Experimental data were fitted with three equilibrium isotherm models: Langmuir, Freundlich and Sips. The results proved that new adsorbent material (Chitosan-DB18C6) is an efficient adsorbent for PGMs recovery from aqueous solutions.Oana GradMihaela CiopecAdina NegreaNarcis DuțeanuGabriela VlasePetru NegreaCamelia DumitrescuTitus VlaseRaluca VodăNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Oana Grad Mihaela Ciopec Adina Negrea Narcis Duțeanu Gabriela Vlase Petru Negrea Camelia Dumitrescu Titus Vlase Raluca Vodă Precious metals recovery from aqueous solutions using a new adsorbent material
description	Abstract Platinum group metals (PGMs) palladium, platinum, and ruthenium represent the key materials for automotive exhaust gas treatment. Since there are no adequate alternatives, the importance of these metals for the automotive industry is steadily rising. The high value of PGMs in spent catalysts justifies their recycling. Therefore, it is really important to recovery platinum group metals from aqueous solutions. Of the many PGMs recovery procedures, adsorption is a process with a good efficiency, but an important role is played by the adsorbent material used into the process. In order to improve the adsorption properties of materials were developed new methods for chemical modification of the solid supports, through functionalization with different extractants. In present paper a new adsorbent material (Chitosan-DB18C6) was used for PGMs recovery. The new adsorbent material was produced by impregnating Chitosan with dibenzo-18-crown-6-ether using Solvent Impregnated Resin (SIR) method. The crown ethers were chosen as extractant due to their known ability to bind metallic ions, whether they are symmetrically or unsymmetrically substituted. In order to determine the PGMs recovery efficiency for new prepared adsorbent material the equilibrium and kinetic studies were performed. Also, to study the PGMs adsorption mechanism the experimental data were modelled using pseudo-first-order and pseudo-second order kinetic models. Experimental data were fitted with three equilibrium isotherm models: Langmuir, Freundlich and Sips. The results proved that new adsorbent material (Chitosan-DB18C6) is an efficient adsorbent for PGMs recovery from aqueous solutions.
format	article
author	Oana Grad Mihaela Ciopec Adina Negrea Narcis Duțeanu Gabriela Vlase Petru Negrea Camelia Dumitrescu Titus Vlase Raluca Vodă
author_facet	Oana Grad Mihaela Ciopec Adina Negrea Narcis Duțeanu Gabriela Vlase Petru Negrea Camelia Dumitrescu Titus Vlase Raluca Vodă
author_sort	Oana Grad
title	Precious metals recovery from aqueous solutions using a new adsorbent material
title_short	Precious metals recovery from aqueous solutions using a new adsorbent material
title_full	Precious metals recovery from aqueous solutions using a new adsorbent material
title_fullStr	Precious metals recovery from aqueous solutions using a new adsorbent material
title_full_unstemmed	Precious metals recovery from aqueous solutions using a new adsorbent material
title_sort	precious metals recovery from aqueous solutions using a new adsorbent material
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/d42a581d076c4b2bb340a2e1297278e7
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Precious metals recovery from aqueous solutions using a new adsorbent material

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