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Updated: May 25, 2026

Experimental Column Setup for Studying Anaerobic Biogeochemical Interactions Between Iron (Oxy)Hydroxides, Trace Elements, and Bacteria
Published on: December 19, 2017
Stoichiometry of bacterial anaerobic oxidation of elemental sulfur by ferric iron
Jiri Kucera1, Josef Zeman, Martin Mandl
1Department of Biochemistry, Faculty of Science, Masaryk University, Brno, Czech Republic.
Abstract:
The conventional stoichiometry of the oxidation of elemental sulfur by ferric iron in Acidithiobacillus ferrooxidans was not in agreement with our experimental data in terms of ferrous iron and proton formation. Reaction modelling under the actual conditions of bacterial activity resulted in a different stoichiometry, where additional iron species participate in the process to affect the number of released protons. The suggested reaction equation may more accurately predict the intensity of environmental acidification during the anaerobic bioprocess.
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