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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Published in:Marine pollution bulletin Vol. 86; no. 1-2; pp. 291 - 297
Main Authors: Turner, R.E., Overton, E.B., Meyer, B.M., Miles, M.S., Hooper-Bui, L.
Format: Journal Article
Language:English
Published: Kidlington Elsevier Ltd 15.09.2014
Elsevier
Subjects:
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
Online Access:Get full text
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Summary:•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.
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ISSN:0025-326X
1879-3363
1879-3363
DOI:10.1016/j.marpolbul.2014.07.003