Journal of Soil and Groundwater Environment (한국지하수토양환경학회지:지하수토양환경)

Korean Society of Soil and Groundwater Environment (한국지하수토양환경학회)
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The Efficiency of Bioleaching Rates for Valuable Metal Ions from the Mine Waste Ore using the Adapted Indigenous Acidophilic Bacteria with Cu Ion

Cu 이온에 적응된 토착호산성박테리아를 이용한 폐광석으로부터 미생물용출 효율 향상

  • Kim, Bong-Ju (Dept. of Energy and Resource Engineering, Chosun University) ;
  • Wi, Dae-Woong (Dept. of Energy and Resource Engineering, Chosun University) ;
  • Choi, Nag-Choul (Dept. of Energy and Resource Engineering, Chosun University) ;
  • Park, Cheon-Young (Dept. of Energy and Resource Engineering, Chosun University)
  • 김봉주 (조선대학교 에너지자원공학과) ;
  • 위대웅 (조선대학교 에너지자원공학과) ;
  • 최낙철 (조선대학교 에너지자원공학과) ;
  • 박천영 (조선대학교 에너지자원공학과)
  • Received : 2011.11.29
  • Accepted : 2012.08.22
  • Published : 2012.08.31
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Abstract

This study was carried out to leach valuable metal ions from the mine waste ore using the adapted indigenous bacteria. In order to tolerance the heavy metals, the indigenous bacteria were repeatedly subcultured in the adaptation-medium containing $CuSO_4{\cdot}5H_2O$ for 3 weeks and 6 weeks, respectively. As the adaptation experiment processed, the pH was rapidly decrease in the adaptation-medium of 6 weeks more than the 3 weeks. The result of bioleaching with the adapted bacteria for 42 days, the pH value of leaching-medium in the 3 weeks tend to increased, whereas the pH of the 6 weeks decreased. In decreasing the pH value in the adaptation-medium and in the leaching-medium, it was identified that the indigenous bacteria were adapted $Cu^{2+}$ the ion and the mine waste ores. The contents of Cu, Fe and Zn in the leaching solution were usually higher leached in 6 weeks than 3 weeks due to the adaptation. Considering the bioleaching rates of Cu, Fe and Zn from these leaching solutions, the highest increasing the efficiency metal ion were found to be Fe. Accordingly, it is expected that the more valuable element ions can be leached out from the any mine waste, if the adapted bacteria with heavy metals will apply in future bioleaching experiments.

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References

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