A novel biphasic leaching approach for the recovery of Cu and Zn from polymetallic bulk concentrate

被引：12

作者：

Patel, Bhargav C. ^{[1
,2
]}

Sinha, Manish Kumar ^{[3
]}

Tipre, Devayani R. ^{[2
]}

Pillai, Abhilash ^{[3
]}

Dave, Shailesh R. ^{[2
]}

机构：

[1] Gujarat Forens Sci Univ, Inst Forens Sci, Gandhinagar 382007, Gujarat, India

[2] Gujarat Univ, Sch Sci, Dept Microbiol & Biotechnol, Ahmadabad 380009, Gujarat, India

[3] CSIR, Natl Met Lab, Jamshedpur 831007, Bihar, India

来源：

BIORESOURCE TECHNOLOGY | 2014年 / 157卷

关键词：

Leptospirillum ferriphilum; Bioleaching; Two stage leaching; Solvent extraction; CATALYZED IBES PROCESS; THIOBACILLUS-FERROOXIDANS; OXIDATION-KINETICS; COPPER; CHALCOPYRITE; BACTERIA; SULFIDES;

D O I：

10.1016/j.biortech.2014.01.101

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

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 2650-558 mg/L/h. Cu extractions were 86.63-46.51 and Zn extractions were 67.89-14.74% in 1st-4th cycle, respectively. The developed consortium exhibited 17-51 times higher IOR compared to original wild type consortium. Extraction isotherm for zinc with 30% Cyanex(R) 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. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：310 / 315

页数：6

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