标题：Respirometry studies of bioleaching of low-grade chalcopyrite ore using six acidophilic strains
作者：Jian Song;Peter D. Franzmann;Jianqiang Lin
作者机构：[Song, J] CSIRO Land and Water, Underwood Avenue, Floreat, WA 6014, Australia, State Key Lab of Microbial Technology, Shandong University, Jinan 25010 更多
会议名称：Bio and Hydrometallurgy
摘要：Respirometry was used to study the growth and activity of six pure cultures of acidophilic bioleaching strains grown on a concentration series of low-grade chalcopyrite ores under various pH conditions. Sulf-olobus metallicus, Acidithiobacillus ferrooxidans, Acidianus brierleyi and Leptospirillum ferriphilum were able to grow on a very low-grade ore (equivalent to 0.1% Cu content). However, the two sulphur-oxidising bacteria Acidithiobacillus caldus and Acidithiobacillus thiooxidans grew poorly on the low-grade ore. Growth rates of all strains, except for perhaps S. metallicus at highest ore grades, displayed growth that was limited by substrate availability on this low-grade ore (0.5% Cu content in the ore). The decrease in solution pH from 3.0 to 1.0 enhanced both the cell growth and Cu dissolution.