Visualisation of the interaction between Acidithiobacillus ferrooxidans and oil shale by atomic force microscopy
Abstract
This study visually documents the mechanical contact and interaction between the bacterial cells of two biogeocenotically different strains of Acidithiobacillus ferrooxidans (At. ferrooxidans) and oil shale containing pyrite. Atomic force microscopy (AFM) imaging was used to visualise initial interaction between the microorganisms and the surface minerals of an oil shale and to evaluate bacterial effects in the first hours of the bioleaching process. Acidithiobacillus ferrooxidans was attached to the shale surface already after 2 h, and after 48 h, numerous cells covered the surface with a biofilm. After 5 day incubation with At. ferrooxidans, AFM imaging revealed ellipsoid etched pits that represent footprints left by detached cells. Combining AFM surface imaging and leaching analysis following bacterial colonisation of oil shale layers demonstrates that an initial attachment to the surface is necessary for the leaching and that later on, once a sufficient concentration of Fe2+ ions i...n the solution is achieved, cells detach to become free cells, and leaching occurs primarily by the Fe3+. This experiment confirmed that microorganisms isolated from sites in which a particular substrate is found will demonstrate stronger binding to that substrate.
Keywords:
atomic force microscopy / Acidithiobacillus ferrooxidans / bioleaching / oil shaleSource:
Journal of Mining and Metallurgy B: Metallurgy, 2012, 48, 2, 207-217Publisher:
- Technical Faculty, Bor-Serbia, Bor
Funding / projects:
DOI: 10.2298/JMMB110923016M
ISSN: 1450-5339
WoS: 000310129700005
Scopus: 2-s2.0-84866762460
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IHTMTY - JOUR AU - Milić, Jelena AU - Beškoski, Vladimir AU - Randjelović, Danijela AU - Stojanović, J. AU - Vrvić, Miroslav PY - 2012 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/989 AB - This study visually documents the mechanical contact and interaction between the bacterial cells of two biogeocenotically different strains of Acidithiobacillus ferrooxidans (At. ferrooxidans) and oil shale containing pyrite. Atomic force microscopy (AFM) imaging was used to visualise initial interaction between the microorganisms and the surface minerals of an oil shale and to evaluate bacterial effects in the first hours of the bioleaching process. Acidithiobacillus ferrooxidans was attached to the shale surface already after 2 h, and after 48 h, numerous cells covered the surface with a biofilm. After 5 day incubation with At. ferrooxidans, AFM imaging revealed ellipsoid etched pits that represent footprints left by detached cells. Combining AFM surface imaging and leaching analysis following bacterial colonisation of oil shale layers demonstrates that an initial attachment to the surface is necessary for the leaching and that later on, once a sufficient concentration of Fe2+ ions in the solution is achieved, cells detach to become free cells, and leaching occurs primarily by the Fe3+. This experiment confirmed that microorganisms isolated from sites in which a particular substrate is found will demonstrate stronger binding to that substrate. PB - Technical Faculty, Bor-Serbia, Bor T2 - Journal of Mining and Metallurgy B: Metallurgy T1 - Visualisation of the interaction between Acidithiobacillus ferrooxidans and oil shale by atomic force microscopy VL - 48 IS - 2 SP - 207 EP - 217 DO - 10.2298/JMMB110923016M ER -
@article{ author = "Milić, Jelena and Beškoski, Vladimir and Randjelović, Danijela and Stojanović, J. and Vrvić, Miroslav", year = "2012", abstract = "This study visually documents the mechanical contact and interaction between the bacterial cells of two biogeocenotically different strains of Acidithiobacillus ferrooxidans (At. ferrooxidans) and oil shale containing pyrite. Atomic force microscopy (AFM) imaging was used to visualise initial interaction between the microorganisms and the surface minerals of an oil shale and to evaluate bacterial effects in the first hours of the bioleaching process. Acidithiobacillus ferrooxidans was attached to the shale surface already after 2 h, and after 48 h, numerous cells covered the surface with a biofilm. After 5 day incubation with At. ferrooxidans, AFM imaging revealed ellipsoid etched pits that represent footprints left by detached cells. Combining AFM surface imaging and leaching analysis following bacterial colonisation of oil shale layers demonstrates that an initial attachment to the surface is necessary for the leaching and that later on, once a sufficient concentration of Fe2+ ions in the solution is achieved, cells detach to become free cells, and leaching occurs primarily by the Fe3+. This experiment confirmed that microorganisms isolated from sites in which a particular substrate is found will demonstrate stronger binding to that substrate.", publisher = "Technical Faculty, Bor-Serbia, Bor", journal = "Journal of Mining and Metallurgy B: Metallurgy", title = "Visualisation of the interaction between Acidithiobacillus ferrooxidans and oil shale by atomic force microscopy", volume = "48", number = "2", pages = "207-217", doi = "10.2298/JMMB110923016M" }
Milić, J., Beškoski, V., Randjelović, D., Stojanović, J.,& Vrvić, M.. (2012). Visualisation of the interaction between Acidithiobacillus ferrooxidans and oil shale by atomic force microscopy. in Journal of Mining and Metallurgy B: Metallurgy Technical Faculty, Bor-Serbia, Bor., 48(2), 207-217. https://doi.org/10.2298/JMMB110923016M
Milić J, Beškoski V, Randjelović D, Stojanović J, Vrvić M. Visualisation of the interaction between Acidithiobacillus ferrooxidans and oil shale by atomic force microscopy. in Journal of Mining and Metallurgy B: Metallurgy. 2012;48(2):207-217. doi:10.2298/JMMB110923016M .
Milić, Jelena, Beškoski, Vladimir, Randjelović, Danijela, Stojanović, J., Vrvić, Miroslav, "Visualisation of the interaction between Acidithiobacillus ferrooxidans and oil shale by atomic force microscopy" in Journal of Mining and Metallurgy B: Metallurgy, 48, no. 2 (2012):207-217, https://doi.org/10.2298/JMMB110923016M . .