Distribution and recovery trajectory of Macondo (Mississippi Canyon 252) oil in Louisiana coastal wetlands

MARINE POLLUTION BULLETIN

卷:87

Article

Turner, R. Eugene¹  Overton, Edward B.²  Meyer, Buffy M.²  Miles, M. Scott²  McClenachan, Giovanna¹  Hooper-Bui, Linda²  Engel, Annette Summers³  Swenson, Erick M.¹  Lee, James M.¹  Milan, Charles S.¹  Gao, Heng² 

[1] Louisiana State Univ, Dept Oceanog & Coastal Sci, Baton Rouge, LA 70803 USA

[2] Louisiana State Univ, Dept Environm Sci, Baton Rouge, LA 70803 USA

[3] Univ Tennessee, Dept Earth & Planetary Sci, Knoxville, TN 37996 USA

关键词: Wetland;    Alkane;    PAH;    Macondo oil spill;    Restoration;    Recovery;   

DOI  :  10.1016/j.marpolbul.2014.08.011

来源: Elsevier

【 摘 要 】

We measured the concentration of petroleum hydrocarbons in 405 wetland sediment samples immediately before the April 2010 Deepwater Horizon disaster led to their broad-scale oiling, and on nine trips afterwards. The average concentrations of alkanes and PAHs were 604 and 186 times the pre-spill baseline values, respectively. Oil was distributed with some attenuation up to 100 m inland from the shoreline for alkanes, but increased for aromatics, and was not well-circumscribed by the rapid shoreline assessments (a.k.a. SCAT) of relative oiling. The concentrations of target alkanes and PAHs in June 2013 were about 1% and 5%, respectively, of the February 2011 concentrations, but remained at 3.7 and 33 times higher, respectively, than in May 2010. A recovery to baseline conditions suggests that the concentration of alkanes may be near baseline values by the end of 2015, but that it may take decades for the PAH concentrations to be that low. (C) 2014 The Authors. Published by Elsevier Ltd.

【 授权许可】

Free