Bacterial iron reduction and biogenic mineral formation for the stabilisation of corroded iron objects.
- Kooli WM Laboratory of Microbiology, Institute of Biology, University of Neuchâtel, 2000, Neuchâtel, Switzerland.
- Comensoli L Laboratory of Microbiology, Institute of Biology, University of Neuchâtel, 2000, Neuchâtel, Switzerland.
- Maillard J Laboratory for Environmental Biotechnology, ENAC-IIE-LBE, Ecole Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland.
- Albini M Laboratory of Microbiology, Institute of Biology, University of Neuchâtel, 2000, Neuchâtel, Switzerland.
- Gelb A Laboratory for Environmental Biotechnology, ENAC-IIE-LBE, Ecole Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland.
- Junier P Laboratory of Microbiology, Institute of Biology, University of Neuchâtel, 2000, Neuchâtel, Switzerland. pilar.junier@unine.ch.
- Joseph E Laboratory of Technologies for Heritage Materials, Institute of Chemistry, University of Neuchâtel, 2000, Neuchâtel, Switzerland. edith.joseph@unine.ch.
- 2018-01-17
Published in:
- Scientific reports. - 2018
English
Exploiting bacterial metabolism for the stabilisation of corroded iron artefacts is a promising alternative to conventional conservation-restoration methods. Bacterial iron reduction coupled to biogenic mineral formation has been shown to promote the conversion of reactive into stable corrosion products that are integrated into the natural corrosion layer of the object. However, in order to stabilise iron corrosion, the formation of specific biogenic minerals is essential. In this study, we used the facultative anaerobe Shewanella loihica for the production of stable biogenic iron minerals under controlled chemical conditions. The biogenic formation of crystalline iron phosphates was observed after iron reduction in a solution containing Fe(III) citrate. When the same biological treatment was applied on corroded iron plates, a layer composed of iron phosphates and iron carbonates was formed. Surface and cross-section analyses demonstrated that these two stable corrosion products replaced 81% of the reactive corrosion layer after two weeks of treatment. Such results demonstrate the potential of a biological treatment in the development of a stabilisation method to preserve corroded iron objects.
- Language
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- English
- Open access status
- gold
- Identifiers
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- DOI 10.1038/s41598-017-19020-3
- PMID 29335593
- Persistent URL
- https://sonar.ch/global/documents/186455
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