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Title: Electrocatalytic recovery of elements from complex mixtures using deep eutectic solvents
Authors: Abbott, Andrew P.
Harris, Robert C.
Holyoak, Fay
Frisch, G.
Hartley, J.
Jenkin, Gawen R. T.
First Published: 15-Dec-2014
Publisher: Royal Society of Chemistry
Citation: Green Chemistry, 2015
Abstract: The dissolution and subsequent selective recovery of elements from complex mixtures naturally necessitates redox chemistry. The majority of processes involve hydrometallurgical dissolution followed by selective chemical precipitation or electrochemical winning. The atom and energy efficiencies of these processes are poor, leading to a large volume of aqueous waste which needs to be treated before disposal. In this study it is demonstrated that electrocatalysis is an atom effective method of carrying out digestion and subsequently recovering elements from solution. Here deep eutectic solvents are used to simplify the speciation of solutes and to allow redox potentials to be modified compared to standard aqueous values. The redox catalyst used is iodine, as it demonstrates high solubility, fast electron transfer and the ability to oxidise most elements, including precious metals such as gold. The efficacy of this electrocatalyic method is demonstrated using three samples; Cu/Zn, Ga/As and Au/Ag/sulfidic ore.
DOI Link: 10.1039/C4GC02246G
ISSN: 1463-9262
eISSN: 1463-9270
Version: Post-print
Status: Peer-reviewed
Type: Journal Article
Rights: Archived with reference to SHERPA/RoMEO and publisher website. © The Royal Society of Chemistry 2014. Version of record:
Description: Electronic supplementary information (ESI) available. See DOI: 10.1039/ c4gc02246g
Appears in Collections:Published Articles, Dept. of Chemistry

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