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Bioleaching of valuable metals from electronic scrap using fungi(Aspergillus niger) as a microorganism  

Ahn, Jae-Woo (Dept. of Advanced Materials Sci. & Eng., Daejin University)
Jeong, Jin-Ki (Minerals and Materials Processing Division, Korea Institute of Geoscience and Mineral Resources)
Lee, Jae-Chun (Minerals and Materials Processing Division, Korea Institute of Geoscience and Mineral Resources)
Kim, Dong-Gin (Minerals and Materials Processing Division, Korea Institute of Geoscience and Mineral Resources)
Publication Information
Resources Recycling / v.14, no.5, 2005 , pp. 24-31 More about this Journal
Abstract
In order to recover valuable metals from fine-grained electronic waste, bioleaching of Cu, Zn, Al, Co, Ni, Fe, Sn and Pb were carried out using Aspergillus niger as a leaching microorganism in a shaking flask. Aspergillus niger was able to grow in the presence of electronic scrap. The formation of organic acids(citric and oxalic acid) from Aspergillus niger caused the mobilization of metals from waste electronic scrap. In a preliminary study, in order to obtain the data on the leaching of Cu, Zn, Al, Fe, Co and Ni from electronic scrap, chemical leaching using organic acid(Citric acid and Oxalic acid) was accomplished. At the electronic scrap concentration of 50 g/L, Aspergillus niger were able to leach more than 95% of the available Cu, Co. But Al, Zn, Pb and Sn were leached about 15-35%. Ni and Fe were detected in the leachate less than 10%.
Keywords
Aspergillus niger; electronic scrap; fungi; bioleaching; citric acid; oxalic acid; metal recovery;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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