Biodegradation of weathered crude oil by microbial communities in solid and melted sea ice

MARINE POLLUTION BULLETIN

卷:172

Article

Lofthus, Synnove^1,3  Bakke, Ingrid¹  Greer, Charles W.²  Brakstad, Odd Gunnar³ 

[1] Norwegian Univ Sci & Technol, Dept Biotechnol & Food Sci, Trondheim, Norway

[2] Natl Res Council Canada, Energy Min & Environm Ctr, Montreal, PQ, Canada

[3] SINTEF Ocean AS, Climate & Environm, Trondheim, Norway

关键词: Dispersed oil;    Biotransformation;    Bacterial dynamics;    Brine;    Dispersant;    Hydrocarbon biodegradation;    Oil pollution;    Oil-degrading bacteria;   

DOI  :  10.1016/j.marpolbul.2021.112823

来源: Elsevier

【 摘 要 】

Oil spilled in the Arctic may drift into ice-covered areas and become trapped until the ice melts. To determine if exposure to oil during freezing may have a priming effect on degradation of the oil, weathered dispersed oil (2-3 mg/L) was frozen into solid ice for 200 days at-10 degrees C, then melted and incubated for 64 days at 4 degrees C. No degradation was measured in oil frozen into ice prior to melting. Both total amount of oil and target compounds were biotransformed by the microbial community from the melted ice. However, oil released from melted ice was degraded at a slower rate than oil incubated in fresh seawater at the same temperature (4 degrees C), and by a different microbial community. These data suggest negligible biodegradation of oil frozen in sea ice, while oil-degrading bacteria surviving in the ice may contribute to biodegradation when the ice melts.

【 授权许可】

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