The Microbial Oxidation of Iron and Sulphur in an Acid Solution from an Auriferous Sulphides Mine from the South-West of Romania

Gherman, Vasile-Daniel; Bréheret, Jean-Gabriel; Motoc, Andrei; Samuilă, Corina; Filimon, Marioara Nicoleta; Borozan, Aurica-Breica

Vasile-Daniel Gherman, Jean-Gabriel Bréheret, Andrei Motoc, Corina Samuilă, Marioara Nicoleta Filimon, Aurica-Breica Borozan

The Microbial Oxidation of Iron and Sulphur in an Acid Solution from an Auriferous Sulphides Mine from the South-West of Romania

Abstract:

The rock layers from above the cavity are slowly crossed, through micro cracks, by the rain water. The rain water arrives on the cavity wall as a concentrated solution with a high acidity level (pH 1-1.5). The percolating acid solution is crowded by acidophilic microorganisms with a dominating population of chemo-autotrophic bacteria Acidithiobacillus ferrooxidans provides the primary organic substance by oxidation of pyrite from the cavity walls and with six strains of Penicillium representing the heterotrophic organisms that use the organic substance from the primary producer. Between the A. ferrooxidans population and the Penicillium strain populations a close trophic relationship is established and the microorganisms number depends on the acid solution concentration. The ferric hydroxide formed through the oxidation of pyrite by A. ferrooxidans is deposed at the Penicillium hyphae exterior and forms minerals structures.

Keywords:
acid solution; acidithiobacillus ferrooxidans; autrotrophe; ferric hydroxide; heterotrophs; penicillium; pyrite

Issue: 2008, Volume 59, Issue 11

Pages:

Publication date: 2008/10/9

https://doi.org/10.37358/RC.08.11.2019

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This article is published under the Creative Commons Attribution 4.0 International License

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