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Institutional Repository [SANDBOX]
Technical University of Crete
Technical University of Crete
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| URI: | http://purl.tuc.gr/dl/dias/5E2A07C8-2CED-46B0-A29D-41F6FBEC12C8 | ||
| Year | 2022 | ||
| Type of Item | Peer-Reviewed Journal Publication | ||
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| Bibliographic Citation | E. Antoniou, E. Fragkou, G. Charalampous, D. Marinakis, N. Kalogerakis, and E. Gontikaki, “Emulating deep-sea bioremediation: oil plume degradation by undisturbed deep-sea microbial communities using a high-pressure sampling and experimentation system,” Energies, vol. 15, no. 13, Jun. 2022, doi: 10.3390/en15134525. https://doi.org/10.3390/en15134525 | ||
| Appears in Collections |
Hydrocarbon biodegradation rates in the deep-sea have been largely determined under atmospheric pressure, which may lead to non-representative results. In this work, we aim to study the response of deep-sea microbial communities of the Eastern Mediterranean Sea (EMS) to oil contamination at in situ environmental conditions and provide representative biodegradation rates. Seawater from a 600 to 1000 m depth was collected using a high-pressure (HP) sampling device equipped with a unidirectional check-valve, without depressurization upon retrieval. The sample was then passed into a HP-reactor via a piston pump without pressure disruption and used for a time-series oil biodegradation experiment at plume concentrations, with and without dispersant application, at 10 MPa and 14 °C. The experimental results demonstrated a high capacity of indigenous microbial communities in the deep EMS for alkane degradation regardless of dispersant application (>70%), while PAHs were highly degraded when oil was dispersed (>90%) and presented very low half-lives (19.4 to 2.2 days), compared to published data. To our knowledge, this is the first emulation study of deep-sea bioremediation using undisturbed deep-sea microbial communities.
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