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Selective coagulation in chalcopyrite/pyrite mineral system using Acidothiobacillus group bacteria
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
2007 (English)In: Advanced Materials Research, ISSN 1022-6680, E-ISSN 1662-8985, Vol. 20-21, 366-370 p.Article in journal (Refereed) Published
Abstract [en]

Acidithiobacillus ferrooxidans cells grown in ferrous ions were used to study the surface modification of pyrite and chalcopyrite, with focus on coagulation of very fine particles (-5 μm). The zeta-potential studies of the minerals, before and after bacterial treatment, showed that the cells have a distinct influence on the surface charge of pyrite and chalcopyrite. The maximum coagulation of particles determined by Turbiscan as a function of pH correlated well with the zeta- potential results. Using diffuse reflectance FT-IR spectroscopic studies, the adhesion of cells showed a varied influence on these minerals. The results demonstrate that Acidithiobacillus ferrooxidans interact with pyrite and chalcopyrite differently, allowing selective coagulation of one mineral from the other under different pH conditions.

Place, publisher, year, edition, pages
2007. Vol. 20-21, 366-370 p.
National Category
Metallurgy and Metallic Materials
Research subject
Mineral Processing
Identifiers
URN: urn:nbn:se:ltu:diva-40313DOI: 10.4028/www.scientific.net/AMR.20-21.366Local ID: f6446300-9c3c-11dc-97ff-000ea68e967bOAI: oai:DiVA.org:ltu-40313DiVA: diva2:1013835
Conference
Biohydrometallurgy : From the single cell to the environemnt 02/09/2007 - 05/09/2007
Note
Validerad; 2007; Bibliografisk uppgift: Conference: Biohydrometallurgy: from the single cell to the environment, 2-5 Sept. 2007 , Frankfurt, Germany; 20071126 (palle); Konferensartikel i tidskriftAvailable from: 2016-10-03 Created: 2016-10-03 Last updated: 2017-10-19Bibliographically approved

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