Presentation Information
[2P0121-29-01]Effects of solution composition on anodic polarization curves of CuFeS2 in acidic chloride solutions
○Nguyen Thi Phuong Thao1, Sanghee Jeon1, Ilhwan Park1, Carlito Baltazar Tabelin2, Mayumi Ito1, Naoki Hiroyoshi1 (1. Hokkaido University, 2. University of New South Wales, Australia)
Keywords:
chalcopyrite,ferrous,cupric,chloride,proton
Effects of solution composition (Fe2+, Cu2+, Cl-, and H+ concentrations) on the anodic polarization curves of chalcopyrite in acidic chloride solutions were studied using the conventional three-electrode system at 25 oC under N2 atmosphere. An active-passive behavior was obtained in all examined conditions, i.e., the current increased with increasing redox potentials to reach a peak at a certain redox potential, then it decreased at higher redox potentials. At all applied redox potentials, the current increased with increasing Fe2+, Cu2+, and Cl- concentrations and decreased with increasing H+ concentrations. Based on the results, the mechanism of chalcopyrite dissolution was discussed.