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Issue
Korean Journal of Chemical Engineering,
Vol.26, No.1, 108-114, 2009
Biological leaching of nickel and cobalt from lateritic nickel ore of Sukinda mines
Mohapatra S, Sengupta C, Nayak BD, Sukla LB, Mishra BK
Abstract.In the present study lateritic nickel ore was used for bacterial leaching using a mixed consortium of mesophilic acidophiles. The microorganisms were adapted to 1 gram nickel/L prior to leaching. For the experiments, lateritic ore in different forms such as raw, roasted, roasted ore presoaked in dilute sulphuric acid and palletized pretreated roasted (400 ℃ and 600 ℃) ore were taken. The leaching experiments were conducted in 9 K+ with 40 L capacity bioreactor using 10% (v/v) inoculum concentration at 10% (w/v) pulp density. The aeration was maintained at 2-3 L/min and the speed of agitator and temperature at 400-500 rpm and 35 ℃. The maximum extraction of nickel and cobalt was observed with pretreated ore (600 ℃) at 10% pulp density (77.23% and 73.22%) respectively within 31 days at pH 1.5 and least extraction in case of raw ore i.e., 9.47% nickel and 41.12% cobalt respectively.
Keywords: Lateritic Nickel Ore; Roasted Ore; Pretreated Ore; Nickel; Cobalt; Mesophilic; Acidophilic; 40 L; Bioreactor
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[Cited By]
  1. Panda S, Sarangi CK, Pradhan N, Subbaiah T, Sukla LB, Mishra BK, Bhatoa GL, Prasad M, Ray SK, Korean Journal of Chemical Engineering, 29(6), 781, 2012
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