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Issue
Korean Journal of Chemical Engineering,
Vol.25, No.3, 524-530, 2008
Percolation bacterial leaching of low-grade chalcopyrite using acidophilic microorganisms
Rao KS, Mishra A, Pradhan D, Chaudhury GR, Mohapatra BK, Das T, Sukla LB, Mishra BK
Bioleaching studies were carried out in percolation columns using low-grade copper containing rock (granite). The lixiviant consisted of acidified ferric sulfate containing acidophilic microorganisms. The iron oxidizing strain was isolated from Malanjkhand mine water and after adaptation the iron oxidation observed to be 500 mg/L/h. Leaching parameters studied were lixiviant flow rate, particle size and bed height. It was observed that leaching efficiency increased with decrease of particle size and lixiviant flow rate. The precipitation of iron during leaching observed to be low as pH was maintained at 2. Based on the leaching kinetics, a unified rate equation was developed and shown as r'α(dp)-0.61 (F)-0.76 (Hb)0.97.
Keywords: Bacterial Leaching; Columns; Lixiviant; Thiobacillus ferrooxidans; Particle Size
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[Cited By]
  1. Pradhan D, Ahn JG, Kim DJ, Lee SW, Korean Journal of Chemical Engineering, 26(3), 736, 2009
  2. Panda S, Rout PC, Sarangi CK, Mishra S, Pradhan N, Mohapatra U, Subbaiah T, Sukla LB, Mishra BK, Korean Journal of Chemical Engineering, 31(3), 452, 2014
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