Biodegradation of dispersed Macondo oil in seawater at low temperature and different oil droplet sizes

被引：136

作者：

Brakstad, Odd G. ^{[1
]}

Nordtug, Trond ^{[1
]}

Throne-Hoist, Mimmi ^{[1
]}

机构：

[1] SINTEF Mat & Chem Environm Technol, Dept Appl Environm Biol & Chem, N-7465 Trondheim, Norway

来源：

MARINE POLLUTION BULLETIN | 2015年 / 93卷 / 1-2期

关键词：

Oil; Biodegradation; Dispersions; Seawater; Low temperature; Droplet size; UNRESOLVED COMPLEX-MIXTURES; PETROLEUM-HYDROCARBONS; CRUDE-OIL; DEEP; SPILL; GULF; BACTERIA; GAS; PERSISTENCE; TOXICITY;

D O I：

10.1016/j.marpolbul.2015.02.006

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

During the Deepwater Horizon (DWH) accident in 2010 a dispersant (Corexit 9500) was applied at the wellhead to disperse the Macondo oil and reduce the formation of surface slicks. A subsurface plume of small oil droplets was generated near the leaking well at 900-1300 m depth. A novel laboratory system was established to investigate biodegradation of small droplet oil dispersions (10 mu m or 30 mu m droplet sizes) of the Macondo oil premixed with Corexit 9500, using coastal Norwegian seawater at a temperature similar to the DWH plume (4-5 degrees C). Biotransformation of volatile and semivolatile hydrocarbons and oil compound groups was generally faster in the 10 mu m than in the 30 mu m dispersions, showing the importance of oil droplet size for biodegradation. These data therefore indicated that dispersant treatment to reduce the oil droplet size may increase the biodegradation rates of oil compounds in the deepwater oil droplets. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：144 / 152

页数：9

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