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Precious metals recovery from aqueous solutions using a new adsorbent material
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 justifi...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7820582/ https://www.ncbi.nlm.nih.gov/pubmed/33479466 http://dx.doi.org/10.1038/s41598-021-81680-z |
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author | Grad, Oana Ciopec, Mihaela Negrea, Adina Duțeanu, Narcis Vlase, Gabriela Negrea, Petru Dumitrescu, Camelia Vlase, Titus Vodă, Raluca |
author_facet | Grad, Oana Ciopec, Mihaela Negrea, Adina Duțeanu, Narcis Vlase, Gabriela Negrea, Petru Dumitrescu, Camelia Vlase, Titus Vodă, Raluca |
author_sort | Grad, Oana |
collection | PubMed |
description | 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 | Online Article Text |
id | pubmed-7820582 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-78205822021-01-26 Precious metals recovery from aqueous solutions using a new adsorbent material Grad, Oana Ciopec, Mihaela Negrea, Adina Duțeanu, Narcis Vlase, Gabriela Negrea, Petru Dumitrescu, Camelia Vlase, Titus Vodă, Raluca Sci Rep Article 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. Nature Publishing Group UK 2021-01-21 /pmc/articles/PMC7820582/ /pubmed/33479466 http://dx.doi.org/10.1038/s41598-021-81680-z Text en © The Author(s) 2021 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Grad, Oana Ciopec, Mihaela Negrea, Adina Duțeanu, Narcis Vlase, Gabriela Negrea, Petru Dumitrescu, Camelia Vlase, Titus Vodă, Raluca Precious metals recovery from aqueous solutions using a new adsorbent material |
title | 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_short | Precious metals recovery from aqueous solutions using a new adsorbent material |
title_sort | precious metals recovery from aqueous solutions using a new adsorbent material |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7820582/ https://www.ncbi.nlm.nih.gov/pubmed/33479466 http://dx.doi.org/10.1038/s41598-021-81680-z |
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