Electrochemical recovery of minor concentrations of gold from cyanide-free cupric chloride leaching solutions
Research output: Contribution to journal › Article › Scientific › peer-review
- Outotec Research Center
A number of electrochemical experiments was performed in order to identify the process variables affecting the Au recovery. Results indicate that so called cut-off potential and deposition time were the EDRR parameters having the strongest impact on gold recovery at fixed concentration of Cu and Au ions. The Au content in the metal deposit after 250 EDRR cycles exceeded 75% and the Au:Cu ratio has increased by a factor of 1000, from 1:340 in the solution up to 3.3:1 in the final product. X-ray photoelectron spectroscopy analysis of the cathode surface confirmed full replacement of sacrificial copper with gold. Obtained results prove that the EDRR method can be efficiently used for the recovery of trace amounts of gold from cupric chloride solutions used for cyanide-free gold leaching.
|Journal||Journal of Cleaner Production|
|Publication status||Published - 20 Feb 2018|
|MoE publication type||A1 Journal article-refereed|