Abstract:
:We determined changes of 28 alkanes and 43 different PAHs in 418 wetland soil samples collected on ten sampling trips to three Louisiana estuaries before and after they were oiled from the 2010 Deepwater Horizon disaster. There was a significant decline in 22 of the 28 alkane analytes (0.42% day(-1)), no change in 6, over 2.5 years. The concentration of five aromatic petroleum hydrocarbons (PAHs) increased (range 0.25-0.70% day(-1)), whereas the total PAH pool did not change. Of these five, naphthalene and C-1-naphthalenes are suggested to be of higher toxicity than the other three because of their relatively higher volatility or solubility. The relative proportions of alkane analytes, but not PAHs, does not yet resemble that in the pre-oiled marshes after 3 years, The trajectories of nine indicators for degradation/weathering were either inconclusive or misleading (alkanes) or confirmed the relatively meager degradation of PAHs.
journal_name
Mar Pollut Bulljournal_title
Marine pollution bulletinauthors
Turner RE,Overton EB,Meyer BM,Miles MS,Hooper-Bui Ldoi
10.1016/j.marpolbul.2014.07.003subject
Has Abstractpub_date
2014-09-15 00:00:00pages
291-297issue
1-2eissn
0025-326Xissn
1879-3363pii
S0025-326X(14)00439-1journal_volume
86pub_type
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