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http://dx.doi.org/10.7844/kirr.2014.23.1.64

Bioleaching Behavior of Cu and Co by Aspergillus Niger Strains from Molasses Culture  

Ahn, Hyo-Jin (Department of Material Sci. & Eng., Daejin University)
Ahn, Jae-Woo (Department of Material Sci. & Eng., Daejin University)
Ryu, Seong-Hyung (Department of Material Sci. & Eng., Daejin University)
Publication Information
Resources Recycling / v.23, no.1, 2014 , pp. 64-69 More about this Journal
Abstract
For the recovery of Co and Cu, bioleaching behavior of Co, Cu, Fe, Mg, Al by Aspergillus niger culture from the molasses growth medium was investigated. Series of leaching tests have been conducted by varying Aspergillus niger's type, molasses concentration in the growth medium, pulp density and reaction time. The results showed that increase of the molasses concentration in the growth medium from 1% to 4% increased the leaching percentage of Co and Cu and the optimal molesses concentration was found to be 4% in the growth medium. Maxinum 90% of Co and 70% of Cu were dissolved from the leaching test at the 10 g/L pulp density, 4 % of molasses concentration in the growth medium after 21 days by Aspergillus niger KCTC 6985. But in case of using Aspergillus niger KCTC 6144, the maxium leaching percentage of Co and Cu was reached 90% respectively at a pulp density 5 g/L and 4% of molasses concentration.
Keywords
Aspergillus niger; bioleaching; cobalt; copper;
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Times Cited By KSCI : 3  (Citation Analysis)
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