Selective Recovery of Rare Earth Elements from Mine Ore by Cr-MIL Metal–Organic Frameworks

Fonseka, C; Ryu, S; Choo, Y; Mullett, M; Thiruvenkatachari, R; Naidu, G; Vigneswaran, S

Selective Recovery of Rare Earth Elements from Mine Ore by Cr-MIL Metal–Organic Frameworks

Fonseka, C Ryu, S

Choo, Y

Mullett, M Thiruvenkatachari, R Naidu, G Vigneswaran, S

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Publisher:: American Chemical Society
Publication Type:: Journal Article
Citation:: ACS Sustainable Chemistry and Engineering, 2021, 9, (50), pp. 16896-16904
Issue Date:: 2021-12-20

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Field	Value	Language
dc.contributor.author	Fonseka, C
dc.contributor.author	Ryu, S https://orcid.org/0000-0003-3030-207X
dc.contributor.author	Choo, Y https://orcid.org/0000-0003-2715-0618
dc.contributor.author	Mullett, M
dc.contributor.author	Thiruvenkatachari, R
dc.contributor.author	Naidu, G
dc.contributor.author	Vigneswaran, S https://orcid.org/0000-0002-8117-4322
dc.date.accessioned	2022-03-02T04:55:41Z
dc.date.available	2022-03-02T04:55:41Z
dc.date.issued	2021-12-20
dc.identifier.citation	ACS Sustainable Chemistry and Engineering, 2021, 9, (50), pp. 16896-16904
dc.identifier.issn	2168-0485
dc.identifier.issn	2168-0485
dc.identifier.uri	http://hdl.handle.net/10453/154963
dc.description.abstract	Rare earth elements (REEs) have become a strategic resource extensively used in renewable energy technologies and modern electronic devices. Depletion of natural REE-bearing mineral deposits has made selective recovery of REEs from alternative sources crucial in meeting the rising global demand. A chromium-based metal–organic framework was synthesized and modified with N-(phosphonomethyl)iminodiacetic acid (PMIDA) in this study to selectively recover REEs (europium, Eu) from chemically complex zinc ore leachate. The adsorbent was characterized and comprehensively examined for Eu uptake as a function of adsorbate concentration, contact time, and pH of the solution. Cr-MIL-PMIDA showed a maximum adsorption capacity of 69.14 mg/g at pH 5.5 while adsorption kinetics best fitted the pseudo-second-order model. Furthermore, Cr-MIL-PMIDA showed exceptional selectivity (88%) toward Eu over competing transitional metal ions (Na, Mg, Al, Ca, Mn, Fe, Ni, Cu, Co, and Zn) found in the dissolved mine ore. High selectivity toward REEs was attributed to the formation of coordinative complexes with grafted carboxylate, phosphonic, and residual amine functional groups. Cr-MIL-PMIDA demonstrated excellent structural stability over multiple regeneration cycles, highlighting its potential for industrial application for REE recovery.
dc.language	English
dc.publisher	American Chemical Society
dc.relation	http://purl.org/au-research/grants/arc/DE200100661
dc.relation.ispartof	ACS Sustainable Chemistry and Engineering
dc.relation.isbasedon	10.1021/acssuschemeng.1c04775
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0301 Analytical Chemistry, 0502 Environmental Science and Management, 0904 Chemical Engineering
dc.title	Selective Recovery of Rare Earth Elements from Mine Ore by Cr-MIL Metal–Organic Frameworks
dc.type	Journal Article
utslib.citation.volume	9
utslib.for	0301 Analytical Chemistry
utslib.for	0502 Environmental Science and Management
utslib.for	0904 Chemical Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2022-03-02T04:55:39Z
pubs.issue	50
pubs.publication-status	Published
pubs.volume	9
utslib.citation.issue	50

Abstract:

Rare earth elements (REEs) have become a strategic resource extensively used in renewable energy technologies and modern electronic devices. Depletion of natural REE-bearing mineral deposits has made selective recovery of REEs from alternative sources crucial in meeting the rising global demand. A chromium-based metal–organic framework was synthesized and modified with N-(phosphonomethyl)iminodiacetic acid (PMIDA) in this study to selectively recover REEs (europium, Eu) from chemically complex zinc ore leachate. The adsorbent was characterized and comprehensively examined for Eu uptake as a function of adsorbate concentration, contact time, and pH of the solution. Cr-MIL-PMIDA showed a maximum adsorption capacity of 69.14 mg/g at pH 5.5 while adsorption kinetics best fitted the pseudo-second-order model. Furthermore, Cr-MIL-PMIDA showed exceptional selectivity (88%) toward Eu over competing transitional metal ions (Na, Mg, Al, Ca, Mn, Fe, Ni, Cu, Co, and Zn) found in the dissolved mine ore. High selectivity toward REEs was attributed to the formation of coordinative complexes with grafted carboxylate, phosphonic, and residual amine functional groups. Cr-MIL-PMIDA demonstrated excellent structural stability over multiple regeneration cycles, highlighting its potential for industrial application for REE recovery.

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http://hdl.handle.net/10453/154963