Patel, Bhargav C and Sinha, Manish K and Tipre, D R and Abhilash, and Dave, S R (2014) A novel biphasic leaching approach for the recovery of Cu and Zn from polymetallic bulk concentrate. Bioresource Technology, 157 (IF-5.039). pp. 310-315.
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In scale-up biphasic leaching process of polymetallic concentrate, the ferric bioregeneration cycles were performed in 15.0 L down flow packed bed reactor; whereas the chemical leaching cycles were done using the biogenerated ferric in an indigenously designed 10.0 L stirred tank reactor. The consortium took 25 cycles for proper biofilm formation. It showed highest iron oxidation rate (IOR) of 3908.21 mg/L/h at 25th cycle under no polymetallic stress. Even under stressed conditions, it was 2650 to 558 mg/L/h. Cu extractions were 86.63 to 46.51 and Zn extractions were 67.89 to 14.74% in 1st to 4th cycle respectively. The developed consortium exhibited 17 to 51 times higher IOR compared to original wild type consortium. Extraction isotherm for zinc with 30% Cyanex® 301 indicated that a total of two stages are required for its complete extraction using the phase ratio of 2:1 at equilibrium pH 1.5, leaving behind Fe(II) in the raffinate.
|Uncontrolled Keywords:||Leptospirillum ferriphilum; Bioleaching; Two stage leaching; Solvent extraction|
|Divisions:||Metal Extraction and Forming|
|Deposited By:||Dr. Abhilash .|
|Deposited On:||10 Feb 2014 18:34|
|Last Modified:||04 May 2016 14:37|
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