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Copper(I) speciation in mixed thiosulfate-chloride and ammonia-chloride solutions: XAS and UV-Visible spectroscopic studies

Etschmann, Barbara; Black, Jay R; Grundler, Pascal V.; Borg, Stacey; Brewe, Dale; McPhail, Derry; Spiccia, Leone; Brugger, Joel

Description

Thiosulfate and ammonia mixtures may be more environmentally benign alternatives to cyanide for leaching Au from ores. In this method, the Cu(i)/Cu(ii) couple acts as a redox mediator aiding in the oxidative dissolution of metallic Au. Information about the speciation of Cu(i) and Cu(ii) in these lixiviant solutions is paramount to the optimization of gold ore processing conditions. With this in mind, we have carried out XANES, EXAFS and UV-Vis spectroscopic studies of the speciation of Cu(i)...[Show more]

CollectionsANU Research Publications
Date published: 2011
Type: Journal article
URI: http://hdl.handle.net/1885/51929
Source: RSC Advances
DOI: 10.1039/c1ra00708d

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