A Primilinary Study on Bio-Oxidation of Sphalerite by Using Acidithiobacillus ferrooxidans from the Acid Mine Drainage of
详细信息
- 责任者：Wan Moli (Department of Earth Sciences ; Sun Yat-Sen University ; Guangzhou 510275 ; China) ; Chen Binghui
- 刊名：Acta Mineralogica Sinica
- 出版年：2010
- 卷期：30(4)
- 关键词：闪锌矿 ; sphalerite ; 氧化作用 ; oxidation ; 微生物 ; microorganisms ; 广东 ; Guangdong Province
- 页码：p.482-489
- 图表：illus., 3 tables, 13 refs.
- 分类号：0600
- issnNo：ISSN1000-4734
- isbnNo：CN52-1045/P
摘要
///A strain of Acidithiobacillus ferrooxidans (A.f.) isolated from the acid mine drainage (AMD) of Dabaoshan mine and a mineral sphalerite were used to study the bio-oxidation of sphalerite. Experiments were designed to compare the differences between abiotic oxidation and bio-oxidation of sphalerite in pH 2 and 3 and with or without Fe2+ conditions, respectively. The concentrations of cations and pH values during the experiments were measured. The solid experimental results were analyzed with XRD. The changes of sphalerite surfaces were investigated by using a scanning electron microscope (SEM). The results showed that sphalerite was easier to be oxidized under the condition of pH 2 than pH 3 without the existence of iron ion. The bacterium A.f. promoted the oxidation of the sphalerite. The bio-oxidation rate of sphalerite is about 10-30 times of the abiotic oxidation rate. Iron ion promoted the bio-oxidation rate up to 300 times faster.
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