Key role of the kinetics of γ-FeOOH bioreduction on the formation of Fe(II–III) minerals
During bacterial reduction of γ-FeOOH lepidocrocite in the presence of formate as electron donor at initial pH 7.5 in bicarbonate buffer, the obtained Fe(II–III) minerals were characterised by transmission Mössbauer spectroscopy (TMS) and X-ray diffraction (XRD). Two types of kinetics, high and slow, of γ-FeOOH bioreduction were obtained. The high rate of ferric oxyhydroxide reduction produced magnetite whereas the slow rate yielded hydroxycarbonate green rust.
KeywordsIron Reduction Bacterial Reduction Green Rust Shewanella Putrefaciens Ferric Oxyhydroxide
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