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Abiotic process for Fe(II) oxidation and green rust mineralization driven by a heterotrophic nitrate reducing bacteria (Klebsiella mobilis).
- M. Etique, F. Jorand, A. Zegeye, B. Grégoire, C. Despas, C. Ruby
- Environmental ScienceEnvironmental science & technology
- 1 April 2014
It is demonstrated how the activity of nitrate-reducing bacteria in ferrous environments may provide a direct link between the biogeochemical cycles of nitrogen and iron.
Nitrate reduction by mixed iron(II-III) hydroxycarbonate green rust in the presence of phosphate anions: the key parameters influencing the ammonium selectivity.
Pseudo-first-order reaction of chemically and biologically formed green rusts with HgII and C₁₅H₁₅N₃O₂: effects of pH and stabilizing agents (phosphate, silicate, polyacrylic acid, and bacterial…
Formation and Transformation of Iron‐Bearing Minerals by Iron(II)‐Oxidizing and Iron(III)‐Reducing Bacteria
Magnetite as a precursor for green rust through the hydrogenotrophic activity of the iron‐reducing bacteria Shewanella putrefaciens
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 reinforces the hypothesis that GR would be the cornerstone of the microbial transformations of iron-bearing minerals in the anoxic biogeochemical cycle of iron.
Origin of the Differential Nanoscale Reactivity of Biologically and Chemically Formed Green Rust Crystals Investigated by Chemical Force Spectroscopy
Using atomic and chemical force microscopy to probe the reactivity at the nanoscale of both types of nanoparticles, it is shown that the primary reason for the low reactivity of b-GR is not the low surface/volume ratio but the passivation of the surface due to the presence of biological exopolymers (EPS).
Abiotically or microbially mediated transformations of magnetite by sulphide species: The unforeseen role of nitrate-reducing bacteria
Mercury Reduction by Nanoparticulate Vivianite
- M. Etique, S. Bouchet, J. Byrne, Laurel K. ThomasArrigo, R. Kaegi, R. Kretzschmar
- GeologyEnvironmental science & technology
- 8 February 2021
The results suggest that vivianite may be involved in abiotic HgII reduction in Fe and organic/P-rich soils and sediments, potentially contributing to Hg evasion while also limiting MeHg formation in these ecosystems.
Fuzzy Limit Between Green Rust and Goethite Biomineralization from a Nitrate-Reducing Bacterium (Klebsiella mobilis): The Influence of Organic Electron Donors