Murdoch University Research Repository

Welcome to the Murdoch University Research Repository

The Murdoch University Research Repository is an open access digital collection of research
created by Murdoch University staff, researchers and postgraduate students.

Learn more

The dissolution of chalcopyrite in chloride solutions. IV. The kinetics of the auto-oxidation of copper(I)

Miki, H. and Nicol, M.ORCID: 0000-0002-8757-161X (2011) The dissolution of chalcopyrite in chloride solutions. IV. The kinetics of the auto-oxidation of copper(I). Hydrometallurgy, 105 (3-4). pp. 246-250.

PDF - Authors' Version
Download (361kB)
Link to Published Version:
*Subscription may be required


The use of chloride in the heap leaching of sulfide minerals requires the regeneration of the oxidants copper(II) and iron(III). While this is possible in a sulfate system by the use of bacterially catalysed oxidation of iron(II), this can only economically be achieved by chemical reaction with dissolved oxygen in chloride systems due to the sensitivity of bacteria to high concentrations of chloride ions. The kinetics of the reduction of dissolved oxygen by copper(I) in acidic chloride solutions has been studied under possible heap leach conditions. The results confirm some published data that the rate is second-order in copper(I). The rate increases with increasing acid concentrations but decreases with increasing chloride and copper(II) concentrations. Peroxide has been shown to be a detectable intermediate and a modified mechanism has been proposed which is consistent with the kinetic data. The use of the derived rate equation in a modified rate expression for the copper-catalysed auto-oxidation of iron(II) has been derived.

Item Type: Journal Article
Murdoch Affiliation(s): Parker Cooperative Research Centre for Integrated Hydrometallurgy Solutions
School of Chemical and Mathematical Science
Publisher: Elsevier BV
Copyright: © 2010 Elsevier B.V.
Item Control Page Item Control Page


Downloads per month over past year