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Leaching of Mn, Co, and Ni from manganese nodules using an anaerobic bioleaching method

Title
Leaching of Mn, Co, and Ni from manganese nodules using an anaerobic bioleaching method
Authors
Lee E.Y.Noh S.-R.Cho K.-S.Ryu H.W.
Ewha Authors
조경숙
SCOPUS Author ID
조경숙scopus
Issue Date
2001
Journal Title
Journal of Bioscience and Bioengineering
ISSN
1389-1723JCR Link
Citation
vol. 92, no. 4, pp. 354 - 359
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
An anaerobic bioleaching of a manganese nodule by anaerobic Mn-reducing bacteria was evaluated for the leaching of metals, Mn, Co, and Ni. Insoluble Mn 4+ in the nodule could be reduced to soluble Mn 2+ by dissimilatory Mn-reducing bacteria that use a carbon source and Mn 4+ as an electron donor and acceptor, respectively. As a result of the Mn reduction, Co and Ni could be leached from the loosed Mn matrix. Leaching experiments were carried out to optimize various process parameters, such as inoculation, pH, temperature, mineral salts, and particle size of the nodule used. The leaching efficiencies of Mn, Co, and Ni increased from 18, 7, and 10% to 77, 70, and 75%, respectively by the inoculation of the Mn-reducing enrichment culture broth. Metals could be efficiently recovered from the nodule in the ranges of pH from 5.0 to 6.5 and temperature from 30 to 45°C by anaerobic bioleaching. External addition of mineral salts was not necessary for Mn, Co, and Ni leaching from the nodule. The optimum ratio of nodule to glucose was 0.1 (w/w). To obtain a leaching efficiency above 70%, the particle size of the nodules must be less than 0.6 mm.
DOI
10.1016/S1389-1723(01)80239-5
Appears in Collections:
엘텍공과대학 > 환경공학전공 > Journal papers
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