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Community dynamics of attached and free cells and the effects of attached cells on chalcopyrite bioleaching by Acidithiobacillus sp.

Abstract：

:The community dynamics of attached and free cells of Acidithiobacillus sp. were investigated and compared during chalcopyrite bioleaching process. In the mixed strains system, Acidithiobacillus ferrooxidans was the dominant species at the early stage while Acidithiobacillus thiooxidans owned competitive advantage from the middle stage to the end of bioprocess. Meanwhile, compared to A. ferrooxidans, more significant effects of attached cells on free biomass with A. thiooxidans were shown in either the pure or mixed strains systems. Moreover, the effects of attached cells on key chemical parameters were also studied in different adsorption-deficient systems. Consistently, the greatest reduction of key chemical ion was shown with A. thiooxidans and the loss of bioleaching efficiency was high to 50.5%. These results all demonstrated the bioleaching function of attached cells was more efficient than the free cells, especially with A. thiooxidans. These notable results would help us to further understand the chalcopyrite bioleaching.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Yang H,Feng S,Xin Y,Wang W

doi

10.1016/j.biortech.2013.12.036

subject

Has Abstract

pub_date

2014-02-01 00:00:00

pages

185-91

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(13)01854-3

journal_volume

154

pub_type

杂志文章

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