title: Microbial community succession mechanism coupling with adaptive evolution of adsorption performance in chalcopyrite bioleaching.
abstract: The community succession mechanism of Acidithiobacillus sp. coupling with adaptive evolution of adsorption performance were systematically investigated. Specifically, the μmax of attached and free cells was increased and peak time was moved ahead, indicating both cell growth of Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans was promoted. In the mixed strains system, the domination courses of A. thiooxidans was dramatically shortened from 22th day to 15th day, although community structure finally approached to the normal system. Compared to A. ferrooxidans, more positive effects of adaptive evolution on cell growth of A. thiooxidans were shown in either single or mixed strains system. Moreover, higher concentrations of sulfate and ferric ions indicated that both sulfur and iron metabolism was enhanced, especially of A. thiooxidans. Consistently, copper ion production was improved from 65.5 to 88.5 mg/L. This new adaptive evolution and community succession mechanism may be useful for guiding similar bioleaching processes.
authors.affiliation: The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, People's Republic of China.
authors.forename: Shoushuai
authors.initials: S
authors.lastname: Feng
authors.affiliation: The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, People's Republic of China.
authors.forename: Hailin
authors.initials: H
authors.lastname: Yang
authors.affiliation: The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, People's Republic of China. Electronic address: bioprocessor@aliyun.com.
authors.forename: Wu
authors.initials: W
authors.lastname: Wang
mesh_terms: D013856:Acidithiobacillus thiooxidans / Q000378:metabolism*; D000327:Adsorption / Q000502:physiology*; D001673:Biodegradation, Environmental; D003300:Copper / Q000378:metabolism*; D007501:Iron / Q000378:metabolism; D013431:Sulfates / Q000378:metabolism; D013455:Sulfur / Q000378:metabolism
chemical_list: D013431:Sulfates; C012819:chalcopyrite; D013455:Sulfur; D003300:Copper; D007501:Iron
keywords: Acidithiobacillus; Adaptive adsorption; Chalcopyrite bioleaching; Community succession