A study of alkalophilic bacteria enhencing leaching of copper tailings
The main objective of this work was to evaluate a bioleaching process from the copper tailings using alkaline bacteria isolated from tailings pulp. Based on 16S rRNA gene sequences determination, it was determined that the bacterium comprised a novel unclassified strain, homology with EF551897. 1 was 80％ , belongs to Thiobacillus species. The life characters of the bacteria were studied at 26t. The optimum condition was researched. The results showed that the pH of bacteria environment was 8-10, the culture time was 8 - 9 d. Bioleaching experiments were carried out in 250 mL Erlenmeyer flasks and a shaking table 150 r/min at 261 which showed that the alkaline bacteria can leach copper from copper tailings. It was established that pH =8. 9, t =26°C and 20％ inoculation amount caused the highest recovery of copper in the bioleaching process, the extraction of copper reached up to 25％ after 50 d.
copper tailings bioleaching alkaline bacteria bacteria characters
Aixiang Wu Shaoyong Wang Hongjiang Wang
Civil and Environment Engineering School, University of Science and Technology Beijing, 100083, Beijing, China
国际会议
The 19th International Biohydrometallurgy Symposium(第19届国际生物湿法冶金大会 IBS2011)
长沙
英文
638-642
2011-09-18（万方平台首次上网日期，不代表论文的发表时间）