Column bioleaching of low-grade copper ore by Acidithiobacillus ferrooxidans in pure and mixed cultures with a heterotrophic acidophile Acidiphilium sp.

Yang, Yu, Diao, Mengxue, Liu, Kai, Qian, Lin, Nguyen, Anh V. and Qiu, Guanzhou (2013) Column bioleaching of low-grade copper ore by Acidithiobacillus ferrooxidans in pure and mixed cultures with a heterotrophic acidophile Acidiphilium sp.. Hydrometallurgy, 131 93-98. doi:10.1016/j.hydromet.2012.09.003


Author Yang, Yu
Diao, Mengxue
Liu, Kai
Qian, Lin
Nguyen, Anh V.
Qiu, Guanzhou
Title Column bioleaching of low-grade copper ore by Acidithiobacillus ferrooxidans in pure and mixed cultures with a heterotrophic acidophile Acidiphilium sp.
Journal name Hydrometallurgy   Check publisher's open access policy
ISSN 0304-386X
1879-1158
Publication date 2013-01-01
Year available 2012
Sub-type Article (original research)
DOI 10.1016/j.hydromet.2012.09.003
Open Access Status Not yet assessed
Volume 131
Start page 93
End page 98
Total pages 6
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Subject 2209 Industrial and Manufacturing Engineering
2506 Metals and Alloys
2505 Materials Chemistry
Abstract The aim of this investigation was to compare a pure culture of Acidithiobacillus ferrooxidans GF with a mixed culture with Acidiphilium sp. DX1-1 in the bioleaching of low-grade copper ore. The leaching experiments were carried out at ambient temperature. The influence of temperature, pH, redox potential and concentration of total iron and ferric ion in solution on the performance of column bioleaching was also investigated. Total DNA was extracted from the mineral samples taken at different depths from the column top surface, and the corresponding microbial community structures were examined using amplified ribosomal DNA restriction analysis (ARDRA). Copper extractions by the pure and mixed cultures achieved 14.87% and 20.11% respectively over a period of 117 days, including 15 days of acid pre-leaching and 102 days of bioleaching. The ratios between autotrophic and heterotrophic bacteria at the top and bottom portions of the columns were 1.20:1 and 2.14:1, respectively. (C) 2012 Elsevier B.V. All rights reserved.
Formatted abstract
The aim of this investigation was to compare a pure culture of Acidithiobacillus ferrooxidans GF with a mixed culture with Acidiphilium sp. DX1-1 in the bioleaching of low-grade copper ore. The leaching experiments were carried out at ambient temperature. The influence of temperature, pH, redox potential and concentration of total iron and ferric ion in solution on the performance of column bioleaching was also investigated. Total DNA was extracted from the mineral samples taken at different depths from the column top surface, and the corresponding microbial community structures were examined using amplified ribosomal DNA restriction analysis (ARDRA). Copper extractions by the pure and mixed cultures achieved 14.87% and 20.11% respectively over a period of 117. days, including 15. days of acid pre-leaching and 102. days of bioleaching. The ratios between autotrophic and heterotrophic bacteria at the top and bottom portions of the columns were 1.20:1 and 2.14:1, respectively.
Keyword Column bioleaching
Low-grade copper ore
Acidithiobacillus ferrooxidans
Acidiphilium sp.
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID 2010CB630901
Institutional Status UQ
Additional Notes Available online: 16 September 2012.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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