Impact of Lipids on Pyrite Oxidation by Bacteria
Author Information
Author(s): Hao Jun, Cleveland Curtis, Lim Eelin, Strongin Daniel R, Schoonen Martin AA
Primary Institution: Temple University
Hypothesis
How does adsorbed lipid affect the oxidation of pyrite by Acidithiobacillus ferrooxidans?
Conclusion
Adsorbed lipid significantly inhibits the oxidation of pyrite by bacteria, even over extended periods.
Supporting Evidence
- The presence of A. ferrooxidans greatly increases pyrite oxidation compared to bacteria-free systems.
- Lipid coatings reduce the oxidation rate of pyrite significantly.
- Bacterial colonization on pyrite is inhibited by the presence of lipid layers.
Takeaway
When bacteria that help break down minerals meet a special fat layer on the mineral, they can't do their job as well, which helps keep the mineral intact.
Methodology
The study involved growing Acidithiobacillus ferrooxidans on pyrite with and without lipid coatings and measuring the oxidation rates over 25 days.
Limitations
The study's findings may not apply to all environmental conditions or other types of lipids.
Digital Object Identifier (DOI)
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