Bioleaching of low-grade tellurium ore by mixed bacteria and A. ferrooxidans

摘要：

The bioleaching of low grade tellurium ore in shake flasks was investigated by using mixed bacteria enriched from the acid mine drainage in Shimian Tellurium Mine in China and Acidithiobacillus ferrooxidans isolated from the mixed bacteria, named as W - 18 and PD - 1, respectively. The results showed that, with inoculation amount of 10％ (volume fraction) , temperature of 30T), initial pH of 1.5, shaking speed of 150 r/min with over 85％ of pulp granular size of < 0. 165 mm and pulp density of 2％ (mass fraction) , the tellurium extraction efficiency can reach up to 76. 3％ by using W — 18 after 30 days of leaching, while using PD - 1 as an inoculum, the extraction efficiency can only reach 67. 8％ after 30 days of leaching with the same leaching parameters except the initial pH of 2. 0. It indicates there may be a bigger potential for bioleaching of the lowgrade ore by using the mixed bacteria W - 18 than the pure Acidithiobacillus ferrooxidans strain PD - 1.

关键词： tellurium ore bioleaching mixed bacteria Acidithiobacillus ferrooxidans

作者: Hongguan Xie Lingfei Lei

作者单位: Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, 610059, Chengdu, China

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: 684-687

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）