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Biomineralization of manganese by Bacillus spp isolated from a marine biofilm

Sarvamangala, H and Gopal, J and Muraleedharan, P and George, RP and Dayal, RK and Natarajan, KA (2008) Biomineralization of manganese by Bacillus spp isolated from a marine biofilm. In: Minerals and Metallurgical Processing, 25 (3). pp. 149-155.

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Biomineralization of manganese on titanium condenser material exposed to seawater has been illustrated. Biomineralization occurs when the fouling components, namely, the microbes, are able to oxidize minerals present in water and deposit them as insoluble oxides on biofilm surfaces. Extensive biofilm characterization studies Showed that an alarmingly large number of bacteria in these biofilms are capable of oxidizing manganese and are, thereby, capable of causing biomineralization on the condenser material exposed to seawater. This paper addresses studies on understanding the exact role of the microbes in bringing about oxidation of manganese. The kinetics of manganese oxidation by marine Gram-positive manganese oxidizing bacterium Bacillus spp. that was isolated front the titanium surface was studied in detail. Manganese oxidation in the presence of Bacillus cells, by cell free extract (CFE) and heat-treated cell free extract was also studied. The study confirmed that bacteria mediate manganese oxidation and lead to the formation of biogenic oxides of MnO2 eventually leading to biomineralization on titanium surface exposed to seawater.

Item Type: Journal Article
Publication: Minerals and Metallurgical Processing
Publisher: Society for Mining, Metallurgy & Exploration
Additional Information: Copyright of this article belongs to Society for Mining, Metallurgy & Exploration.
Keywords: Bio mineralization;Manganese oxidizing bacteria;Biofilm.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 10 Jul 2009 10:26
Last Modified: 10 Jul 2009 10:26
URI: http://eprints.iisc.ac.in/id/eprint/20988

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