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Leptosririllum ferrooxidans-sulfide mineral interactions with reference to bioflotation nad bioflocculation
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
2008 (English)In: Transactions of Nonferrous Metals Society of China, ISSN 1003-6326, E-ISSN 2210-3384, Vol. 18, no 6, p. 1403-1409Article in journal (Refereed) Published
Abstract [en]

The adhesion of ferrous ions grown Leptospirillum ferrooxidans cells on pyrite and chalcopyrite minerals was investigated through adsorption, Zeta-potential and diffuse reflectance FT-IR measurements. The influence of bacterial species on minerals floatability was determined by Hallimond flotation tests while the flocculation behaviour was examined by Turbiscan measurements. The minerals iso-electric point (pH 6.5-7.5) after interaction with bacterial cells shifted towards cells iso-electric point (pH 3.3), indicating the chemical nature of cells adsorption on mineral surfaces. The FT-IR spectra of minerals treated with bacterial cells showed the presence of all the cell functional groups signifying cells adsorption. The bacterial cells adsorption on chalcopyrite was higher compared with pyrite, which agreed with cells greater depression effect on chalcopyrite flotation and pronounced flocculation behaviour in comparison with pyrite.

Place, publisher, year, edition, pages
2008. Vol. 18, no 6, p. 1403-1409
National Category
Metallurgy and Metallic Materials
Research subject
Mineral Processing
Identifiers
URN: urn:nbn:se:ltu:diva-9931DOI: 10.1016/S1003-6326(09)60016-9Scopus ID: 2-s2.0-58649083260Local ID: 8a393f00-f488-11dd-a323-000ea68e967bOAI: oai:DiVA.org:ltu-9931DiVA, id: diva2:982870
Note
Validerad; 2008; 20090206 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Vilinska, AnnamariaRao, K. Hanumantha

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