期刊
BIORESOURCE TECHNOLOGY
卷 200, 期 -, 页码 186-193出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2015.09.054
关键词
Free cells; Community structure; Attached cells; Chalcopyrite bioleaching
资金
- National Natural Science Foundation of China [31301540, 21306064]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- 111 Project [111-2-06]
- Natural Science Foundation of Jiangsu Province [BK20150133]
- Scientific Program of Jiangnan University [JUSRP11538]
The effects of free cells on community structure of attached cells and chalcopyrite bioleaching by Acidithiobacillus sp. during different stages were investigated. The attached cells of Acidithiobacillus thiooxidans owned the community advantage from 14th d to the end of bioprocess in the normal system. The community structure of attached cells was greatly influenced in the free cells-deficient systems. Compared to A. thiooxidans, the attached cells community of Acidithiobacillus ferrooxidans had a higher dependence on its free cells. Meanwhile, the analysis of key biochemical parameters revealed that the effects of free cells on chalcopyrite bioleaching in different stages were diverse, ranging from 32.8% to 64.3%. The bioleaching contribution of free cells of A. ferrooxidans in the stationary stage (8-14th d) was higher than those of A. thiooxidans, while the situation was gradually reversed in the jarosite passivation inhibited stage (26-40th d). These results may be useful in guiding chalcopyrite bioleaching. (C) 2015 Elsevier Ltd. All rights reserved.
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