Selective Coagulation in Chalcopyrite/Pyrite Mineral System Using Acidithiobacillus Group Bacteria

Annamaria Vilinska; K. Hanumantha Rao; K.S.Eric Forssberg

doi:10.4028/www.scientific.net/AMR.20-21.366

Paper Titles

Pyrite Surface Alteration of Synthetic Single Crystals as Effect of Microbial Activity and Crystallographic Orientation
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The Catalytic Influence of Sulfolobus metallicus in the Bioleaching of Chalcopyrite: Role of Attached and Planktonic Population
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Bioflotation of a Black Shale Copper Ore
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Surface Hydrophobicity of an Acidophilic Heterotrophic Bacterium of Mine Origin under Metal Stress
p.362

Selective Coagulation in Chalcopyrite/Pyrite Mineral System Using Acidithiobacillus Group Bacteria
p.366

Combined Atomic Force and Fluorescence Microscopy of Biofilms formed by Leaching Bacteria on Opaque Substrata
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Novel Steel Corrosion Protection by Microbial Extracellular Polymeric Substances (EPS) – Biofilm-Induced Corrosion Inhibition
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Inhibition of Microbiologically Influenced Corrosion of Mild Steel and Stainless Steel 316 by an Organic Inhibitor
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Influence of Growth Substrate and Attachment Substratum on EPS and Biofilm Formation by Acidithiobacillus ferrooxidans
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 20-21Selective Coagulation in Chalcopyrite/Pyrite...

Selective Coagulation in Chalcopyrite/Pyrite Mineral System Using Acidithiobacillus Group Bacteria

Abstract:

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 m). 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 zetapotential 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.

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Advanced Materials Research (Volumes 20-21)

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366-370

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.20-21.366

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Online since:

July 2007

Authors:

Annamaria Vilinska, K. Hanumantha Rao, K.S.Eric Forssberg

Keywords:

Acidithiobacillus ferrooxidans, Coagulation, FT-IR, Sulphide Minerals, Zeta-Potential

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