Influence of pressure and dispersant on oil biodegradation by a newly isolated Rhodococcus strain from deep-sea sediments of the gulf of Mexico.
Mar Pollut Bull
; 150: 110683, 2020 Jan.
Article
in En
| MEDLINE
| ID: mdl-31753565
ABSTRACT
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 (1500â¯mâ¯=â¯15â¯MPa). Additionally, the effect of dispersant (Corexit EC9500A) addition was studied. Rhodococcus sp. PC20 was shown to degrade 60.5⯱â¯10.7% of the saturated and aromatic fraction of crude oil at atmospheric pressure and 74.2⯱â¯9.1% at deep-sea level pressure within 96â¯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 1100 and higher. This effect of the dispersant was enhanced when elevated pressure was applied.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Biodegradation, Environmental
/
Rhodococcus
/
Petroleum
/
Petroleum Pollution
Country/Region as subject:
Mexico
Language:
En
Journal:
Mar Pollut Bull
Year:
2020
Document type:
Article