Comparsion of bioleaching of copper sulphides by Acidithiobacillus ferrooxidans

  • Kaibin Fu
  • Hai Lin
  • Deqiang Luo
  • Wufei Jiang
  • Ping Zeng

Abstract

Bioleaching of copper sulphides were investigated. The results show that the copper extraction from djurleite, bornite, covellite and chalcopyrite under the optimal conditions were 95.12, 84.5, 54.1, and 18.33%, respectively. A ranking for the bioleaching of copper sulfides was obtained: djurleite > bornite > covellite > chalcopyrite. A determination of the extent of adsorption of A. ferrooxidans on the surface of the minerals showed that the cell density of Acidithiobacillus ferrooxidans on djurleite was the highest. The order of adsorption on the copper sulphides was: djurleite > bornite > covellite > chalcopyrite. The results suggest a difference in affinity of bacteria for different copper sulphides. The higher the leaching rate of copper sulphides, the greater the density of bacteria absorbed on the surface of minerals.

Keywords: Bioleaching, copper sulphides, Acidithiobacillus ferrooxidans, cell density, copper extraction

African Journal of Biotechnology, Vol. 13(5), pp. 664-672, 29 January, 2014

Author Biographies

Kaibin Fu
Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China
Hai Lin
School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
Deqiang Luo
Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China
Wufei Jiang
Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China
Ping Zeng
Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China
Published
2015-05-11
Section
Articles

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eISSN: 1684-5315