Serpentine Dissolution in the Presence of Bacteria Bacillus mucilaginosus
Abstract
Dissolution of serpentine in the presence of soil bacteria Bacillus mucilaginosus is examined through solution chemistry analysis, X-ray diffraction and 3D X-ray microscopy. Microbe-mineral interactions were carried out by incubating serpentine powder and the bacteria for 30 days. Measured Mg concentrations in the culture media were significantly higher than that in any of the control experiments at any time during the experiments. However, the behavior of the Mg/Si ratio was similar to what was known for inorganic dissolution of silicate minerals. XRD analysis revealed increased quantity of amorphous components in the reacted mineral samples, and tomography images showed a very porous and powdered appearance of the dissolved serpentine grains. These data suggest the dissolution probably proceeds through an incongruent route. Further, these observations imply that there is little genetic control by the microbes during the bacteria-mineral interaction; rather, the accelerated dissolution results primarily from a biologically induced process. Finally, the observed pH decrease, the presence of carboxylic acid, ketone, aldehyde, phenol, and alcohol in the metabolites suggests that organic acids and ligands secreted by the bacteria are largely responsible for the accelerated mineral dissolution.
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Several studies have demonstrated enhanced dissolution of serpentine and olivine by microbes mainly through the production of organic acids.
“Several studies have demonstrated enhanced dissolution of serpentine and olivine by microbes mainly through the production of organic acids (e.g., [56][57][58]).”
From Strategizing carbon-neutral mines: A case for pilot projects (2014) · cites this paper as [56]
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Strategizing carbon-neutral mines: A case for pilot projects
Power, I., McCutcheon, J., Harrison, A., Wilson, S., Dipple, G., Kelly, S., Southam, C., & Southam, G. (2014) · Minerals · doi:10.3390/min4020399 · Cited by 87 · see citing works
- Authors
- Yao, M., Lian, B., Teng, H. H., Tian, Y., & Yang, X.
- Affiliations
- Chinese Academy of Sciences (CN)
- George Washington University (US)
- University of Science and Technology of China (CN)
- ORCID
- Venue
- Geomicrobiology Journal
- Publisher
- Informa UK Limited
- Published
- 2013-01
- Volume
- 30
- Issue
- 1
- Pages
- 72-80
- ISSN
- 0149-0451 (ISSN-L)
- 1521-0529
- OpenAlex
- W2073927336
- Cited by
- 37
- References
- 59
- Citations by year
- 2026: 1 · 2025: 1 · 2024: 3 · 2023: 3 · 2022: 4 · 2021: 1 · 2020: 4 · 2019: 5 · 2018: 3 · 2017: 4 · 2016: 1 · 2015: 2 · 2014: 4 · 2013: 1
- FWCI
- 1.86
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Geomicrobiology Journal (publishedVersion)
- Topics
- Physical Sciences › Environmental Science › Environmental Engineering › CO2 Sequestration and Geologic Interactions
- Physical Sciences › Earth and Planetary Sciences › Earth-Surface Processes › Building materials and conservation
- Physical Sciences › Engineering › Biomedical Engineering › Metal Extraction and Bioleaching
- Keywords
- Bacillus mucilaginosus, incongruent dissolution, magnesium ion release, organic acids, bacterial metabolites, amorphous silica, soil bacteria
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