Journal article
Electron Donor Utilization and Secondary Mineral Formation during the Bioreduction of Lepidocrocite by Shewanella putrefaciens CN32
Minerals (Basel), Vol.9(7), 434
07/14/2019
DOI: 10.3390/min9070434
Abstract
The bioreduction of Fe(III) oxides by dissimilatory iron reducing bacteria (DIRB) may result in the production of a suite of Fe(II)-bearing secondary minerals, including magnetite, siderite, vivianite, green rusts, and chukanovite; the formation of specific phases controlled by the interaction of various physiological and geochemical factors. In an effort to better understand the effects of individual electron donors on the formation of specific Fe(II)-bearing secondary minerals, we examined the effects of a series of potential electron donors on the bioreduction of lepidocrocite (γ-FeOOH) by Shewanella putrefaciens CN32. Biomineralization products were identified by X-ray diffraction, Mössbauer spectroscopy, and scanning electron microscopy. Acetate, citrate, ethanol, glucose, glutamate, glycerol, malate, and succinate were not effectively utilized for the bioreduction of lepidocrocite by S. putrefaciens CN32; however, substantial Fe(II) production was observed when formate, lactate, H2, pyruvate, serine, or N acetylglucosamine (NAG) was provided as an electron donor. Carbonate or sulfate green rust was the dominant Fe(II)-bearing secondary mineral when formate, H2, lactate, or NAG was provided, however, siderite formed with pyruvate or serine. Geochemical modeling indicated that pH and carbonate concentration are the key factors determining the prevalence of carbonate green rust verses siderite.
Details
- Title: Subtitle
- Electron Donor Utilization and Secondary Mineral Formation during the Bioreduction of Lepidocrocite by Shewanella putrefaciens CN32
- Creators
- Edward J O’LoughlinChristopher A GorskiTheodore M FlynnMichelle M Scherer
- Resource Type
- Journal article
- Publication Details
- Minerals (Basel), Vol.9(7), 434
- DOI
- 10.3390/min9070434
- ISSN
- 2075-163X
- eISSN
- 2075-163X
- Grant note
- name: Subsurface Biogeochemical Research Program, Office of the Biological and Environmental Research, Office of Science, U.S. Department of Energy, award: DE-AC02-06CH11357
- Language
- English
- Date published
- 07/14/2019
- Academic Unit
- Civil and Environmental Engineering
- Record Identifier
- 9984197297602771
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