Key role of the kinetics of γ-FeOOH bioreduction on the formation of Fe(II–III) minerals

Abstract : 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.
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Submitted on : Tuesday, December 18, 2018 - 6:07:08 PM
Last modification on : Thursday, April 11, 2019 - 3:30:06 PM

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G. Ona-Nguema, F. Jorand, O. Benali, Mustapha Abdelmoula, J-M. R Genin, et al.. Key role of the kinetics of γ-FeOOH bioreduction on the formation of Fe(II–III) minerals. Hyperfine Interactions, Springer Verlag, 2002, pp.415-418. ⟨10.1007/978-94-010-0281-3_102⟩. ⟨hal-01959561⟩

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