Comparative bioleaching of chalcopyrite concentrate with mesophiles and moderate thermophiles in the stirred tank reactor and their ecology analysis

摘要：

Bioleaching of chalcopyrite concentrate by mesophiles at 30℃, and moderate thermophiles at 481 in the stirred tank reactor was carried out respectively. The results showed that moderate thermophiles obtained good performance for chalcopyrite bioleaching and the copper concentration could achieve to 13.4 g/L after 40 days, while during bioleaching with mesophiles, the copper concentration was only 8. 1 g/L. Furthermore, the concentration of total iron extracted by moderate thermophiles was also higher than that by mesophiles. The analysis of ore residue after bioleached indicates that more sulphur was formed during mesophilic bioleaching than that in moderately thermophilic bioleaching, and this is one of the major reasons why copper extraction by mesophiles was lower than that by moderate thermophiles. The ecology analysis results showed that community composition of moderate thermophiles was Acidithiobacillus caldus, Leptospirillum ferriphilum, Sulfobacillus thermosulfidooxidans and Sulfobacillus acidophilus, and the composition of mesophiles was A. ferrooxidans, A. thiooxidans, L. ferrooxidans and Acidiphilium spp.

关键词： comparative bioleaching mesophiles moderate thermophiles chalcopyrite ecology analysis

作者: Weimin Zeng Guanzhou Qiu Miao Chen Hongbo Zhou Xueduan Liu

作者单位: School of Minerals Processing and Bioengineering, Central South University, 410083, Changsha, China School of Minerals Processing and Bioengineering, Central South University, 410083, Changsha, China CSIRO Process Science and Engineering, Clayton, Victoria, Australia

会议类型: 国际会议

会议名称: The 19th International Biohydrometallurgy Symposium(第19届国际生物湿法冶金大会 IBS2011)

会议地点: 长沙

会议语种:英文

页码: 742-748

在线出版日期: 2011-09-18（万方平台首次上网日期，不代表论文的发表时间）