The Effect of As(Ⅴ) on the Oxidizing Capacity of the Mixed Culture of Acidithiobacillus Ferrooxidans
详细信息
- 责任者：Wang Hongmei (Key Laboratory of Biogeology and Environmental Geology of Ministry of Education ; China University of Geosciences ; Wuhan 430074 ; China) ; Yang Xiaofen
- 刊名：Acta Petrologica et Mineralogica
- 出版年：2009
- 卷期：28(6)
- 关键词：黄钾铁矾 ; jarosite
- 页码：p.507-512
- 图表：5 illus., 19 refs.
- 分类号：0700
- issnNo：ISSN1000-6524
- isbnNo：CN11-1966/P
摘要
///Comparable studies were conducted between chemical oxidation and microbial oxidation of ferrous sulfate by a mixed culture of Acidithiobacillus ferrooxidans in the presence of different concentrations of As(Ⅴ). Eh, pH and Fe2+ concentration were monitored periodically and the final precipitation was analyzed by X-ray diffraction (XRD) and SEM. The data obtained showed and chemical oxidation of Fe2+ was very slow with a final oxidizing ratio of <8% and As(Ⅴ) had no effect on Fe2+ oxidation chemically. Slight enhancement of Fe2+ oxidation was observed by 100 mg/ L As(Ⅴ) in the microbial system. Complete oxidation of Fe2+ could be reached in about 60 hours in the presence of A. ferrooxidans with 500 mg～