Investigations on Bioleaching of Copper and Zinc Oxide Ores

  • M. A. Shabani
  • M. IrannajadEmail author
  • M. Meshkini
  • A. R. Azadmehr
Technical Paper


Although bioleaching is a well-known process for extraction of metals from sulfide ores investigated by many researchers, bioleaching of oxide ores has not been thoroughly studied. In this study, bioleaching of copper oxide ore and zinc oxide ore has been carried out by a heterotrophic bacterium, Pseudomonas aeruginosa. Organic reagents that are produced during bioleaching serve as a leaching agent and dissolve copper and zinc from these ores. In these experiments, the effect of parameters like bioleaching time, glucose percentage in the culture medium and solid/liquid ratio was optimized. Optimum conditions were found as glucose percentage of 6 (both copper and zinc), bioleaching time of 8 days for copper and 5 days for zinc, and the solid/liquid ratio of 1:100 for both zinc and copper. Under these conditions, 47% of copper and 41% of zinc were extracted. According to the obtained results, tolerance of this bacterium to copper is more than zinc tolerance.


Bioleaching Pseudomonas aeruginosa Copper oxide ore Zinc oxide ore 


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Copyright information

© The Indian Institute of Metals - IIM 2019

Authors and Affiliations

  • M. A. Shabani
    • 1
  • M. Irannajad
    • 1
    Email author
  • M. Meshkini
    • 1
    • 2
  • A. R. Azadmehr
    • 1
  1. 1.Department of Mining and Metallurgical EngineeringAmirkabir University of TechnologyTehranIran
  2. 2.Iranian Academic Center for Education, Culture and Research (ACECR), Branch of AmirkabirTehranIran

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