A Study of the Bio-Oxidation of Pyrite by Acidithiobacillus ferrooxidans from the Acid Mine Drainage in the Dabaoshan Polymetallic Ore Deposit, Northern Guangdong Province

• 责任者：Chen Binghui (Department of Earth Sciences ; Sun Yat-Sen University ; Guangzhou 510275 ; China) ; Wan Moli
• 刊名：Acta Petrologica et Mineralogica
• 出版年：2010
• 卷期：29(5)
• 关键词：氧化作用 ; oxidation ; 细菌 ; bacteria ; 黄铁矿 ; pyrite
• 页码：p.562-568
• 图表：2 illus., 3 tables, 22 refs.
• 分类号：0600
• issnNo：ISSN1000-6524
• isbnNo：CN11-1966/P

The microbial oxidation of sulfide minerals in wet metallurgy has been widely studied. In recent years, the reaction between the bacterium Acidithiobacillus ferrooxidans (A. f.) and pyrite in mining environments has also aroused attention and become a focus in the study of reactions between microorganisms and minerals. In this paper, a strain of A. f. isolated from the acid mine drainage (AMD) and the mineral pyrite from the tailings of the Dabaoshan Mine were used to probe into the bio-oxidation of pyrite. The experimental results showed that Fe²⁺, Cd²⁺, As⁵⁺ ions were produced by the oxidation of pyrite and that the pyrite is easier to be oxidized at pH 2 than at pH 3.