Microbially-induced pyrite removal from galena using Bacillus subtilis

Sarvamangala, H and Natarajan, KA and Girisha, ST (2013) Microbially-induced pyrite removal from galena using Bacillus subtilis. In: International Journal of Mineral Processing, 120 . pp. 15-21.

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Abstract

Cells and metabolic products of Bacillus subtilis were used in microbially-induced flocculation and flotation to separate pyrite from galena. Enhanced selective affinity of bacterial cells towards pyrite was observed when compared to galena through adsorption studies. Both extracellular (EP) and intracellular (IP) bacterial proteins were isolated from B. subtilis before and after interaction with the minerals and their profiles established through SDS-PAGE. Protein fractions exhibited significant surface affinity towards galena when compared to pyrite. Presence of galena during bacterial growth promoted increased generation of extracellular proteins, while that of pyrite resulted in enhanced production of exopolysaccharides. Galena surfaces were rendered hydrophobic after bacterial interaction.

Item Type:	Journal Article
Publication:	International Journal of Mineral Processing
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Bacillus Subtilis; Biobeneficiation; Pyrite; Galena; Extracellular and Intracellular Proteins
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	10 Jun 2013 08:09
Last Modified:	10 Jun 2013 08:09
URI:	http://eprints.iisc.ac.in/id/eprint/46650

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