Copper(i) speciation in mixed thiosulfate-chloride and ammonia-chloride solutions: XAS and UV-Visible spectroscopic studiesElectronic Supplementary Information (ESI) available: composition of solutions for XAS and UV-Visible measurements (Tables S1-S4); results of principle component analysis and residual maps for the thiosulfate-chloride and ammonia-chloride data UV-Visible data (Figures S1-S4). See DOI: 10.1039/c1ra00708d

• Main Authors: Etschmann, Barbara E, Black, Jay R, Grundler, Pascal V, Borg, Stacey, Brewe, Dale, McPhail, D. C, Spiccia, Leone, Brugger, Joël
• Format: Journal Article
• Language: English
• Published: 14.11.2011

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...