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Influence of pressure and dispersant on oil biodegradation by a newly isolated Rhodococcus strain from deep-sea sediments of the gulf of Mexico
Publikationstyp
Journal Article
Date Issued
2020-01
Sprache
English
Institut
TORE-URI
Journal
Volume
150
Article Number
110683
Citation
Marine Pollution Bulletin (150): 110683 (2020-01)
Publisher DOI
Scopus ID
A new Rhodococcus strain, capable of degrading crude oil, was isolated from the Gulf of Mexico deep-sea sediment and was investigated for its biodegradation characteristics under atmospheric as well as under deep-sea pressure (1500 m = 15 MPa). Additionally, the effect of dispersant (Corexit EC9500A) addition was studied. Rhodococcus sp. PC20 was shown to degrade 60.5 ± 10.7% of the saturated and aromatic fraction of crude oil at atmospheric pressure and 74.2 ± 9.1% at deep-sea level pressure within 96 h. Degradation rates, especially for monoaromatic hydrocarbons, were significantly higher at elevated pressure compared to atmospheric pressure. This study found a growth inhibiting effect at a dispersant to oil ratio of 1:100 and higher. This effect of the dispersant was enhanced when elevated pressure was applied.
Subjects
Biodegradation
Crude oil
Deep-sea
Gulf of Mexico
Rhodococcus
DDC Class
000: Allgemeines, Wissenschaft