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Selective Recovery of Copper from a Synthetic Metalliferous Waste Stream Using the Thiourea-Functionalized Ion Exchange Resin Puromet MTS9140

Riley, Alex L.; Porter, Christopher P.; Ogden, Mark D.

Authors

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Dr Alex Riley A.L.Riley@hull.ac.uk
Lecturer in Environmental Science

Christopher P. Porter

Mark D. Ogden



Abstract

The extraction of Cu from mixed-metal acidic solutions by the thiourea-functionalized resin Puromet MTS9140 was studied. Despite being originally manufactured for precious metal recovery, a high selectivity towards Cu was observed over other first-row transition metals (>90% removal), highlighting a potential for this resin in base metal recovery circuits. Resin behaviour was characterised in batch-mode under a range of pH and sulphate concentrations and as a function of flow rate in a fixed-bed setup. In each instance, a high selectivity and capacity (max. 32.04 mg/g) towards Cu was observed and was unaffected by changes in solution chemistry. The mechanism of extraction was determined by XPS to be through reduction of Cu(II) to Cu(I) rather than chelation. Elution of Cu was achieved by the use of 0.5 M–1 M NaClO3. Despite effective Cu elution (82%), degradation of resin functionality was observed, and further detailed through the application of IC analysis to identify degradation by-products. This work is the first detailed study of a thiourea-functionalized resin being used to selectively target Cu from a complex multi-metal solution.

Citation

Riley, A. L., Porter, C. P., & Ogden, M. D. (2021). Selective Recovery of Copper from a Synthetic Metalliferous Waste Stream Using the Thiourea-Functionalized Ion Exchange Resin Puromet MTS9140. Eng, 2(4), 512-530. https://doi.org/10.3390/eng2040033

Journal Article Type Article
Acceptance Date Nov 2, 2021
Online Publication Date Nov 5, 2021
Publication Date Dec 1, 2021
Deposit Date Nov 8, 2021
Publicly Available Date Nov 8, 2021
Journal Eng
Print ISSN 2673-4117
Electronic ISSN 2673-4117
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 2
Issue 4
Pages 512-530
DOI https://doi.org/10.3390/eng2040033
Keywords Copper; Ion exchange; Thiourea; X-ray photoelectron spectroscopy (XPS); Reductive extraction; Resource recovery
Public URL https://hull-repository.worktribe.com/output/3875372

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