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Received November 26, 2007
Accepted February 27, 2008
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Effect of thermal pretreatment on recovery of nickel and cobalt from Sukinda lateritic nickel ore using microorganisms
Institute of Minerals and Materials Technology (CSIR), Bhubaneswar-751013, India 1Department of Botany, Kalyani University, West Bengal-741235, India
Korean Journal of Chemical Engineering, September 2008, 25(5), 1070-1075(6), 10.1007/s11814-008-0175-2
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Abstract
Experimental investigation made previously on microbiological leaching of nickel and cobalt from the laterite nickel ore of Sukinda Valley reveals that the recovery was not very much promising under any favorable conditions. Therefore, in order to improve the efficiency for bioleaching, the homogenized lateritic ore in palletized form is thermally pretreated by roasting at different temperatures. The parameters studied for the bioleaching experiments were the four types of pretreated ore which were roasted at different temperatures, i.e., 300 ℃, 400 ℃, 600 ℃ and 800 ℃, in shake flask by using a mixed mesophilic acidophilic bacterial consortium consisting predominantly of the Acidithiobacillus ferrooxidans strain. It was observed that the pretreated ore at 600 ℃ with 10% (w/v) pulp density showed maximum recovery of nickel and cobalt, i.e., 59.18% (4.556 ppm) and 65.09% (0.546 ppm), using 10% (v/v) (2.5×108 cells/ml) consortium concentration at 1.5 pH, 30 ℃, and 150 rpm after an incubation period of 31 days.
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References
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Mishra M, Singh S, Das T, Kar RN, Rao KS, Sukla LB, Mishra BK, Korean J. Chem. Eng., 25(3), 531 (2008)
Rao KS, Mishra A, Pradhan D, Chaudhary GR, Mohapatra BK, das T, Sukla LB, Mishra BK, Korean J. Chem. Eng., (in press)
Brierley JA, Brierley CL, Hydrometallurgy, 59, 233 (2001)
Olanipekun EO, Int. J. Miner. Process., 60, 9 (2000)
Sukla LB, Das RP, Transaction Indian Institute of Metals, 40, 351 (1987)
Valix M, Usai F, Malik R, Miner. Eng., 14(2), 197 (2001)
Bosecker K, In R.W. Lawrence, R. M. R. Branion and H.G. Ebner (Editors), Fundamental and applied biohydrometallurgy, Proceedings of the 6th International Symposium on Biohydrometallurgy, Vancouver, B.C., Canada, Elsevier, Amsterdam, August 21-24, pp. 367-382 (1985)
Sukla LB, Kar RN, Panchanadikar VV, In: Ayyana, C., (Ed.), Recent trends in biotechnology, Tata McGraw Hill Publishing Co., New Delhi, pp. 128-131 (1993)
Sukla LB, Panchanadikar VV, Hydrometallurgy, 32, 373 (1983)
Tzeferis PG, Agatzini-Leonardou S, Hydrometallurgy, 36, 345 (1994)
Drobner E, Huber H, Stetter KO, Appl. Environ. Microbiol., 56, 2922 (1990)
Mohapatra S, Bohidar S, Pradhan N, Kar RN, Sukla LB, Hydrometallurgy, 85, 1 (2007)
Acharya C, Kar RN, Sukla LB, World Journal of Microbiology and Biotechnology, 14, 769 (1998)
Silverman MP, Lundgren DG, J. Bacteriol., 77, 642 (1959)
