Comparison of Indigenous and Exogenous Mesophilic Bacteria for the Bioleaching of Low Grade Copper Ores

Jia Lin Sun; Ba Ba Ngom; Yi Liu; Hua Qun Yin; Yi Li Liang; Xue Duan Liu; Jing He Zhu

doi:10.4028/www.scientific.net/AMR.825.58

Paper Titles

Microbial Community Composition on Lignite before and after the Addition of Phosphate Mining Wastes
p.42

Underground Degradation of Lignite Coal Spoil Material by a Mixed Microbial Community under Acid Mine Drainage Conditions
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Insights into Bacterial Community Structure of a Commercial Copper Bioheapleaching Plant: Growth of Heterotrophic Bacteria in the System
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Enrichment of "Ferrovum" spp. and Gallionella Relatives Using Artificial Mine Water
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Comparison of Indigenous and Exogenous Mesophilic Bacteria for the Bioleaching of Low Grade Copper Ores
p.58

Enrichment and Isolation of Phosphorus Solubilizing Bacteria
p.62

A Novel Acidianus Strain Isolated from Copahue, Argentina Involved in the Sulphur Cycle of a Volcanic Environment
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Visualization of Attachment and Colonization of Pyrite Surfaces by a Novel Species of Acidianus
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Identification and Characterization of a Psychrotolerant Acidithiobacillus Strain from Chilean Altiplano
p.74

HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 825Comparison of Indigenous and Exogenous Mesophilic...

Comparison of Indigenous and Exogenous Mesophilic Bacteria for the Bioleaching of Low Grade Copper Ores

Abstract:

Using indigenous microorganisms in biomining processes assures few ecological distortions and less time consumption for adaptation. However, there is a debate as to whether an indigenous microbial community is more efficient than one composed of microbial strains selected for specific physiological traits. In order to provide thoughtful opinions in such a debate, a cross-comparison of six strains isolated from two different regions: Chambishi Copper Mine (Zambia) and Dexing Copper Mine (China), was conducted. Physiological properties and leaching performances of Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans, and Leptospirillum ferriphilum in pure and mixed culture were studied. The results showed that strains within species presented similar traits while copper resistance was not species-specific. In terms of leaching efficiency, native strains always achieved higher cell density and greater iron and copper extraction rates than the exogenous. In addition, microbial community analysis revealed the different mixed culture shared almost the same profile, and At. ferrooxidans strains always outcompeted the other strains.

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Periodical:

Advanced Materials Research (Volume 825)

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58-61

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.825.58

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Online since:

October 2013

Authors:

Jia Lin Sun, Ba Ba Ngom, Yi Liu, Hua Qun Yin, Yi Li Liang, Xue Duan Liu, Jing He Zhu

Keywords:

Bioleaching, Exogenous, Indigenous

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