Biogenic catalysis in sulphide minerals' weathering processes and acid mine drainage genesis

• Authors: Mária Kušnierová , Mária Praščáková , Anna Nowak , Katarzyna Gorazda , Zbigniew Wzorek
• Languages of publication: EN

Abstracts

EN

Bioleaching and biogenesis are the main outputs from a large group of environmental processes participating in the natural material cycle, used in raw materials processing. Bio-oxidation reactions are the main basis for bioleaching procedures, often participating in parallel leaching processes. During the leaching processes of polycomponent sulphide substrates, the factor of process selection also plays an important role, being in direct relation to the electric properties and galvanic effect occurring between the individual components of the leaching substrate. This work gives a summary of the results of a research focused on the possibilities of using biotechnological procedures for treatment of Slovak sulphide ores. The object of the research is extraction of valuable metals, undesirable admixtures and degradation of crystal lattice of sulphides for subsequent chemical leaching processing of precious metals. The results of experiments on the existence of biogenic processes in situ on waste dumps from exploitation containing residual sulphides are also presented. The processes result in acid mine drainage water generation. These waters are strongly mineralised (over 48 g/L) and of low pH; that is why they are very caustic. The arsenic content (2.558 mg/L) in outflowing waters from old mines is high and over the limits set by the law.

Keywords

EN

sulphide minerals; weathering; acid mine drainage; biotransformation; Acidithiobacillus ferrooxidans

• Publisher: Polish Biochemical Society
• Journal: Acta Biochimica Polonica
• Year: 2014
• Volume: 61
• Issue: 1
• Pages: 33-39

Dates

published

2014

received

2013-10-15

revised

2013-12-06

accepted

2013-12-11

(unknown)

2014-01-22

Contributors

author

Mária Kušnierová

• Institute of Geotechnics, Slovak Academy of Sciences, Kosice, Slovak Republic

author

Mária Praščáková

• Institute of Geotechnics, Slovak Academy of Sciences, Kosice, Slovak Republic

author

Anna Nowak

• Institute of Chemistry and Inorganic Technology, Cracow University of Technology, Kraków, Poland

author

Katarzyna Gorazda

• Institute of Chemistry and Inorganic Technology, Cracow University of Technology, Kraków, Poland

author

Zbigniew Wzorek

• Institute of Chemistry and Inorganic Technology, Cracow University of Technology, Kraków, Poland

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