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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 18    No. 6    December 2008

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Screening and characterization of Acidiphilium sp. PJH and its role in bioleaching
PENG Juan-hua(彭娟花), ZHANG Rui-yong(张瑞永), ZHANG Qian(张 倩),
ZHANG Li-min(张立民), ZHOU Hong-bo(周洪波)

Key Laboratory of Biometallurgy of Ministry of Education, School of Minerals Processing and Bioengineering,
Central South University, Changsha 410083, China

Abstract:A Gram-negative, facultative autotrophic bacterium strain PJH was isolated from the acidic mine drainages sampled in Dexing Mine, Jiangxi Province, China. The isolate grew in a pH range of 1.0−6.0, with pH and temperature optima of 3.5 and 40 ℃, respectively. Spectroscopic experiments show that strain PJH can synthesize polyhydroxybutyrate (PHB). A phylogenetic analysis based on 16S rRNA sequences shows that the isolate belongs to the genus Acidiphilium. Strain PJH has the capability of leaching chalcopyrite. Bioleaching experiments show that it can improve the leaching rate of chalcopyrite by 10.3% when mixed with L. ferriphilium YTW315 after 35 d. Strain PJH has the potential in application to bioleach chalcopyrite with other mesophilic leaching microbes.

 

Key words: isolation; Acidiphilium sp.; phylogenetic analysis; bioleaching; chalcopyrite

ISSN 1672-7029
CN 43-1423/U

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