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Development of a clean bioelectrochemical process for leaching of ocean manganese nodules

By Abha Kumari and KA Natarajan

Abstract

Through the application of negative reduction potential significant reduction of manganic and iron oxides in the ocean manganese nodules can be achieved, liberating the occluded copper, nickel and cobalt for easy dissolution in an acid medium. Electroleaching and electrobioleaching of ocean manganese nodules in the presence of Thiobacillus ferrooxidans and Thiobacillus thiooxidans at the above negative applied dc potentials resulted in significant dissolution of copper, nickel and cobalt in 1 M H2SO4. The role of galvanic interactions in the bioleaching of ocean manganese nodules in the presence of T thiooxidans is also discussed, (C) 2002 Published by Elsevier Science Ltd

Topics: Materials Engineering (formerly Metallurgy)
Publisher: Elsevier Science
Year: 2002
DOI identifier: 10.1016/S0892-6875(01)00209-6
OAI identifier: oai:eprints.iisc.ac.in:39141
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