Changes in the concentration and relative abundance of alkanes and PAHs from the Deepwater Horizon oiling of coastal marshes

•We measured oil constituents in wetlands before and after the 2010 Macondo oil spill.•Twenty-two of 28 alkane analytes declined (0.40%day−1) and six did not.•Five PAHs increased (@ 0.24–0.70%day−1) over the first 2.5 years.•The application of 9 potential degradation/weathering indicators was unsucc...

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Vydané v:	Marine pollution bulletin Ročník 86; číslo 1-2; s. 291 - 297
Hlavní autori:	Turner, R.E., Overton, E.B., Meyer, B.M., Miles, M.S., Hooper-Bui, L.
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Kidlington Elsevier Ltd 15.09.2014 Elsevier
Predmet:	Alkane alkanes Alkanes - analysis Animal and plant ecology Animal, plant and microbial ecology Applied ecology Biological and medical sciences C-1-naphthalenes coasts Ecotoxicology, biological effects of pollution Environmental Monitoring - statistics & numerical data Environmental Restoration and Remediation - standards estuaries Fundamental and applied biological sciences. Psychology History, 21st Century Louisiana Macondo oil spill Marine Marine and brackish environment marshes Naphthalene PAH petroleum Petroleum Pollution - analysis Petroleum Pollution - history polycyclic aromatic hydrocarbons Polycyclic Aromatic Hydrocarbons - analysis Sea water ecosystems soil sampling solubility Synecology Time Factors toxicity Water Pollutants, Chemical - analysis water pollution weathering Wetland wetland soils Wetlands ASW, USA, Louisiana Louisiana Macondo oil spill C-1-naphthalenes Naphthalene Wetland PAH Alkane Oil spill Hydrocarbon Deep water Polycyclic aromatic compound Persistent organic pollutant Concentration measurement Marine environment Marsh Aromatic compound Organic compounds Ecological abundance
ISSN:	0025-326X, 1879-3363, 1879-3363
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Shrnutí:	•We measured oil constituents in wetlands before and after the 2010 Macondo oil spill.•Twenty-two of 28 alkane analytes declined (0.40%day−1) and six did not.•Five PAHs increased (@ 0.24–0.70%day−1) over the first 2.5 years.•The application of 9 potential degradation/weathering indicators was unsuccessful. 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 2.5years. 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 3years, The trajectories of nine indicators for degradation/weathering were either inconclusive or misleading (alkanes) or confirmed the relatively meager degradation of PAHs.
Bibliografia:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0025-326X 1879-3363 1879-3363
DOI:	10.1016/j.marpolbul.2014.07.003