|
|
|
篇目详细内容 |
|
【篇名】 |
Fe(II) oxidation by Acidithiobacillus ferrooxidans in pure and mixed cultures in the presence of arsenate |
|
【刊名】 |
Frontiers of Earth Science in China |
|
【刊名缩写】 |
Front. Earth Sci. China |
|
【ISSN】 |
1673-7385 |
|
【EISSN】 |
1673-7490 |
|
【DOI】 |
10.1007/s11707-009-0027-3 |
|
【出版社】 |
Higher Education Press and Springer-Verlag |
|
【出版年】 |
2009 |
|
【卷期】 |
3
卷2期 |
|
【页码】 |
221-225
页,共
5
页 |
|
【作者】 |
Xiaofen YANG;
Hongmei WANG;
Linfeng GONG;
Hima HASSANE;
Zhengbo JIANG;
|
|
【关键词】 |
Acidithiobacillus ferrooxidans; arsenate; jarosite; bio-oxidation; geomicrobiology |
【摘要】 |
|
Fe2+ oxidation by Acidithiobacillus ferrooxidans in pure and mixed cultures was investigated in batch cultures in the presence of arsenate. The pH value was periodically monitored and Fe2+ content was analyzed by the 1,10-phenanthroline method. ICP-AES was employed for the analysis of As(V) concentration in the solution phase. Precipitates were collected and analyzed by X-ray diffraction. Slight enhancement of iron bio-oxidation was observed in mixed cultures with the two greatest As(V) concentrations (1.0 and 5.0 mg/L As), which were enriched from sediment samples in an abandoned copper mine site. As(V) concentrations decreased with time, indicating either the co-precipitation with or the adsorption by jarosite, the major sink of solid phase. Our data suggest that biogenically synthesized jarosite may play an important role in the attenuation of soluble arsenate in natural aquatic environments. |
|
