Cited by 37Microbial Fuel Cells and BioremediationGeomagnetism and Paleomagnetism StudiesGeochemistry and Elemental Analysis

Magnetite as a precursor for green rust through the hydrogenotrophic activity of the iron‐reducing bacteria Shewanella putrefaciens

Etique, M., Jorand, F. P. A., Ruby, C.·2016·Geobiology

Abstract

Magnetite (Fe(II) Fe(III) 2 O4 ) is often considered as a stable end product of the bioreduction of Fe(III) minerals (e.g., ferrihydrite, lepidocrocite, hematite) or of the biological oxidation of Fe(II) compounds (e.g., siderite), with green rust (GR) as a mixed Fe(II) -Fe(III) hydroxide intermediate. Until now, the biotic transformation of magnetite to GR has not been evidenced. In this study, we investigated the capability of an iron-reducing bacterium, Shewanella putrefaciens, to reduce magnetite at circumneutral pH in the presence of dihydrogen as sole inorganic electron donor. During incubation, GR and/or siderite (Fe(II) CO3 ) formation occurred as secondary iron minerals, resulting from the precipitation of Fe(II) species produced via the bacterial reduction of Fe(III) species present in magnetite. Taking into account the exact nature of the secondary iron minerals and the electron donor source is necessary to understand the exergonic character of the biotic transformation of magnetite to GR, which had been considered to date as thermodynamically unfavorable at circumneutral pH. This finding reinforces the hypothesis that GR would be the cornerstone of the microbial transformations of iron-bearing minerals in the anoxic biogeochemical cycle of iron and opens up new possibilities for the interpretation of the evolution of Earth's history and for the understanding of biocorrosion processes in the field of applied science.

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Crossref · 10.1111/gbi.12170

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Authors
Etique, M., Jorand, F. P. A., & Ruby, C.
Affiliations
Centre National de la Recherche Scientifique (FR)
Corresponding author
Etique, M.
Venue
Geobiology
Publisher
Wiley
Published
2015-12-30
Volume
14
Issue
3
Pages
237-254
ISSN
  • 1472-4669 (ISSN-L)
  • 1472-4677
OpenAlex
W2326926306
Cited by
37
References
90
Citations by year
2026: 1 · 2024: 3 · 2023: 2 · 2022: 8 · 2021: 4 · 2020: 6 · 2019: 2 · 2018: 5 · 2017: 3 · 2016: 2 · 2015: 1
FWCI
2.64
Type
journal article
Language
en
Open access
closed
Locations
  • Geobiology (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Funders
  • Agence Nationale pour la Gestion des Déchets Radioactifs
  • Centre National de la Recherche Scientifique
Topics
  • Physical Sciences › Environmental Science › Environmental Engineering › Microbial Fuel Cells and Bioremediation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Geomagnetism and Paleomagnetism Studies
  • Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Geochemistry and Elemental Analysis
Keywords
magnetite, green rust, Shewanella putrefaciens, iron-reducing bacteria, siderite, secondary iron minerals, biomineralization, iron biogeochemical cycle, microbiologically influenced corrosion, circumneutral pH
MeSH terms
Ferric Compounds, Iron, Oxidation-Reduction, Shewanella putrefaciens, Ferrosoferric Oxide

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