METHOD FOR ARSENIC REMOVAL AND GOLD LEACHING BY MICROBIAL OXIDATION
TIAN Xiao-juan1, WANG Yan1, DU De-ping1, PENG Li-e2
1. Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China;
2. College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
Three Thiobacillus ferrooxidans strains with strong arsenic resistance and capacity of sulfide ore decomposition, namely M1s, 1# and Malan, were used for a microbial oxidation and leaching experiment on DBF ore from Shimian County, Sichuan Province. The arsenic content and pH change in the microbial oxidation process and the optimum leaching conditions of gold were studied intensively. The change of the microbial oxidation process with time and the optimum leaching conditions of gold are given in the paper.