Selective recovery of platinum from spent autocatalyst solution by thiourea modified magnetic biocarbons

Abstract The precious platinum group metals distributed in urban industrial products should be recycled because of their rapid decline in the contents through excessive mining. In this work, thiourea modified magnetic biocarbons are prepared via an energy-efficient microwave-assisted activation and...

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Autores principales:	Shao-Yi Lo, Wahid Dianbudiyanto, Shou-Heng Liu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2e01e2be869744709ea618f69283308e
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spelling	oai:doaj.org-article:2e01e2be869744709ea618f69283308e2021-12-02T18:51:07ZSelective recovery of platinum from spent autocatalyst solution by thiourea modified magnetic biocarbons10.1038/s41598-021-98118-12045-2322https://doaj.org/article/2e01e2be869744709ea618f69283308e2021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-98118-1https://doaj.org/toc/2045-2322Abstract The precious platinum group metals distributed in urban industrial products should be recycled because of their rapid decline in the contents through excessive mining. In this work, thiourea modified magnetic biocarbons are prepared via an energy-efficient microwave-assisted activation and assessed as potential adsorbents to recover platinum ions (i.e., Pt(IV)) from dilute waste solution. The physicochemical properties of prepared biocarbons are characterized by a series of spectroscopic and analytic instruments. The adsorption performance of biocarbons is carried out by using batch tests. Consequently, the maximum adsorption capacity of Pt(IV) observed for adsorbents is ca. 42.8 mg g−1 at pH = 2 and 328 K. Both adsorption kinetics and isotherm data of Pt(IV) on the adsorbents are fitted better with non-linear pseudo second-order model and Freundlich isotherm, respectively. Moreover, the thermodynamic parameters suggest that the Pt(IV) adsorption is endothermic and spontaneous. Most importantly, the adsorbents exhibit high selectivity toward Pt(IV) adsorption and preserve ca. 96.9% of adsorption capacity after six cyclic runs. After adsorption, the regeneration of the prepared adsorbents can be effectively attained by using 1 M thiourea/2% HCl mixed solution as an eluent. Combined the data from Fourier transform infrared and X-ray photoelectron spectroscopies, the mechanisms for Pt(IV) adsorption are governed by Pt–S bond between Pt(IV) and thiourea as well as the electrostatic attraction between anionic PtCl6 2− and cationic functional groups of adsorbents. The superior Pt(IV) recovery and sustainable features allow the thiourea modified magnetic biocarbon as a potential adsorbent to recycle noble metals from spent autocatalyst solution.Shao-Yi LoWahid DianbudiyantoShou-Heng LiuNature 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 Shao-Yi Lo Wahid Dianbudiyanto Shou-Heng Liu Selective recovery of platinum from spent autocatalyst solution by thiourea modified magnetic biocarbons
description	Abstract The precious platinum group metals distributed in urban industrial products should be recycled because of their rapid decline in the contents through excessive mining. In this work, thiourea modified magnetic biocarbons are prepared via an energy-efficient microwave-assisted activation and assessed as potential adsorbents to recover platinum ions (i.e., Pt(IV)) from dilute waste solution. The physicochemical properties of prepared biocarbons are characterized by a series of spectroscopic and analytic instruments. The adsorption performance of biocarbons is carried out by using batch tests. Consequently, the maximum adsorption capacity of Pt(IV) observed for adsorbents is ca. 42.8 mg g−1 at pH = 2 and 328 K. Both adsorption kinetics and isotherm data of Pt(IV) on the adsorbents are fitted better with non-linear pseudo second-order model and Freundlich isotherm, respectively. Moreover, the thermodynamic parameters suggest that the Pt(IV) adsorption is endothermic and spontaneous. Most importantly, the adsorbents exhibit high selectivity toward Pt(IV) adsorption and preserve ca. 96.9% of adsorption capacity after six cyclic runs. After adsorption, the regeneration of the prepared adsorbents can be effectively attained by using 1 M thiourea/2% HCl mixed solution as an eluent. Combined the data from Fourier transform infrared and X-ray photoelectron spectroscopies, the mechanisms for Pt(IV) adsorption are governed by Pt–S bond between Pt(IV) and thiourea as well as the electrostatic attraction between anionic PtCl6 2− and cationic functional groups of adsorbents. The superior Pt(IV) recovery and sustainable features allow the thiourea modified magnetic biocarbon as a potential adsorbent to recycle noble metals from spent autocatalyst solution.
format	article
author	Shao-Yi Lo Wahid Dianbudiyanto Shou-Heng Liu
author_facet	Shao-Yi Lo Wahid Dianbudiyanto Shou-Heng Liu
author_sort	Shao-Yi Lo
title	Selective recovery of platinum from spent autocatalyst solution by thiourea modified magnetic biocarbons
title_short	Selective recovery of platinum from spent autocatalyst solution by thiourea modified magnetic biocarbons
title_full	Selective recovery of platinum from spent autocatalyst solution by thiourea modified magnetic biocarbons
title_fullStr	Selective recovery of platinum from spent autocatalyst solution by thiourea modified magnetic biocarbons
title_full_unstemmed	Selective recovery of platinum from spent autocatalyst solution by thiourea modified magnetic biocarbons
title_sort	selective recovery of platinum from spent autocatalyst solution by thiourea modified magnetic biocarbons
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/2e01e2be869744709ea618f69283308e
work_keys_str_mv	AT shaoyilo selectiverecoveryofplatinumfromspentautocatalystsolutionbythioureamodifiedmagneticbiocarbons AT wahiddianbudiyanto selectiverecoveryofplatinumfromspentautocatalystsolutionbythioureamodifiedmagneticbiocarbons AT shouhengliu selectiverecoveryofplatinumfromspentautocatalystsolutionbythioureamodifiedmagneticbiocarbons
_version_	1718377436764176384

Selective recovery of platinum from spent autocatalyst solution by thiourea modified magnetic biocarbons

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