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Oxidation of green rust by anoxygenic phototrophic Fe(II)-oxidising bacteria

X. Han1,2,3,4,5,

1Biogeomagnetism Group, Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
2Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, 72074 Tuebingen, Germany
3France-China International Laboratory of Evolution and Development of Magnetotactic Multicellular Organisms, Chinese Academy of Sciences, Beijing 100029, China
4Institutions of Earth Science, Chinese Academy of Sciences, China
5University of Chinese Academy of Sciences, Beijing 100049, China

E.J. Tomaszewski2,

2Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, 72074 Tuebingen, Germany

J. Sorwat2,

2Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, 72074 Tuebingen, Germany

Y. Pan1,3,4,5,

1Biogeomagnetism Group, Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
3France-China International Laboratory of Evolution and Development of Magnetotactic Multicellular Organisms, Chinese Academy of Sciences, Beijing 100029, China
4Institutions of Earth Science, Chinese Academy of Sciences, China
5University of Chinese Academy of Sciences, Beijing 100049, China

A. Kappler2,

2Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, 72074 Tuebingen, Germany

J.M. Byrne2,

2Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, 72074 Tuebingen, Germany

Affiliations  |  Corresponding Author  |  Cite as  |  Funding information

Cite this letter as: Han, X., Tomaszewski, E.J., Sorwat, J., Pan, Y., Kappler, A., Byrne, J.M. (2020) Oxidation of green rust by anoxygenic phototrophic Fe(II)-oxidising bacteria. Geochem. Persp. Let. 12, 52–57 .

German Research Foundation (DFG) grant no. KA 1736/39-1.
Grant of the National Natural Science Foundation of China (41621004).
China Scholarship Council.

Geochemical Perspectives Letters v12  |  doi: 10.7185/geochemlet.2004
Received 29 May 2019  |  Accepted 13 December 2019  |  Published 31 January 2020
Copyright © The Authors

Published by the European Association of Geochemistry
under Creative Commons License CC BY-NC-ND 4.0




Table 1 Fe concentration and pH of four GR materials: Initial GR, GR_water, GR_SW2 and GR_TIE-1.
GR materialsAqueous phaseSolid phaseTotal Fe(II) (mM)Total Fe (mM)pH
Fe(II) (mM)Fe(II) (mM)Fe(III) (mM)Fe(III)/Fe(II)
Initial GR0.08140.7241.710.30140.80182.519.72
GR_water0.03130.1539.040.30130.18169.229.69
GR_SW20.11108.3131.880.29108.42140.308.69
GR_TIE-10.16107.8532.630.30108.01140.648.55
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Figure 1 Scanning electron microscopy (SEM) images of (a) GR_SW2 starting material, (b) SW2 culture suspension with GR, and (c,d) TIE-1 culture suspension with GR after 13 days cultivation. All scale bars in figures are 1 μm. The green hexagons are GR. The red arrows point to the cells.
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Figure 2 (a,b) Dissolved Fe(II), (c,d) Fe(II) in solid phase, (e,f) Fe(III) in solid phase at different time points during GR oxidation by SW2 and TIE-1. Error bars indicate standard deviation of three biological replicates.
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Figure 3 Mössbauer spectroscopy data of the minerals produced by oxidation of GR by the phototrophic Fe(II)-oxidising strains SW2 (10 % inoculum (a) and 20 % inoculum (b)) and TIE-1 (10 % inoculum (c) and 20 % inoculum (d)), respectively. Magn. Fe(III) corresponds to a magnetically ordered Fe mineral.
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