Microbes from Waste Mining Water and Bioleaching of Complez Copper-Bearing Sulfide
By using culture-independent 16S rDNA based on cloning approach- restriction fragment length polymorphism (RFLP) analysis method, the composition of microbial communities in three bacterial culture samples, which were waste mining water obtained from Dexing Copper Mine, Jiangxi Province, China, enriched in different culture mediums, was determined. These bacterial samples were used to leach a complex copper-bearing sulfide. The 9K-Ⅰbacterial culture, was mainly composed of At. ferrooxidans and Leptospirillum species (group Ⅰ, group Ⅱand group Ⅲ), for 40 days’ bioleaching, it had the maximum extraction efficiency of iron and copper, in the liquid, the concentration of Fe reached to 1450 mg/L, for Cu, it reached to 310 mg/L; The A-Y-Ⅰbacterial culture, was mainly composed of Acidiphilium sp. XTS-1 and Leptospirillum species (group Ⅱand group Ⅲ), had the minimum extraction efficiency of iron (630 mg/L in liquid) and copper (81 mg/L in liquid). At. ferrooxidans and Leptospirillum ferrooxidans (group Ⅰ) seemed to be bacteria playing important roles in extraction of copper and iron, in this study. Scanning electrode microscopy (SEM) results showed different species of bacteria had different abilities adsorbing on ore powder surface. The amount of bacteria adsorbed on ore powder surface may relate to the extraction efficiency of copper and iron from the complex copper-bearing sulfide.
bioleaching complez copper-bearing sulfide bacterial culture at ferroozidans Leptospirillum species
XIE Xuehui XIAO Shengmu LIU Jianshe
School of Environmental Science & Engineering,Donghua University,Shanghai 201620,China School of Environmental Science & Engineering,Donghua University,Shanghai 201620,China School of Re
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
1699-1705
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）