Louisiana Coastal Marsh Environments and MC252 Oil Biomarker Chemistry
| Autor: | Buffy M. Meyer, Martin S. Miles, Puspa L. Adhikari, Edward B. Overton, Gregory M. Olson |
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| Rok vydání: | 2018 |
| Předmět: |
geography
Marsh geography.geographical_feature_category 010504 meteorology & atmospheric sciences Sediment Weathering 010501 environmental sciences 01 natural sciences Anoxic waters Sterane chemistry.chemical_compound Oceanography chemistry Deepwater horizon Environmental chemistry Salt marsh Oil spill Environmental science 0105 earth and related environmental sciences |
| Popis: | Gas chromatography/mass spectrometry analysis of over 700 near-surface sediments and sediments cores collected from Louisiana coastal salt marshes has provided an insight into the unique effects that these environments have on the Deepwater Horizon (DWH) oil residues deposited in them after the accidental release in April 2010. The weathering of oil residues was dependent on whether it was deposited on the surface, incorporated just below the sediment surface, or buried in the anoxic soil layer that can be typically found in these environments. One of the primary effects observed was a predictable weathering pattern of the biomarkers found in these oil residues, particularly changes in the diasterane and regular sterane biomarkers. Qualitative and quantitative oil source fingerprinting techniques were employed to determine if any oil residues detected were from the DWH oil spill (i.e., MC252 oil). The redistribution of buried oil residues in some of the impacted marshes by tropical weather events remains a concern 6 years after the DWH spill. |
| Databáze: | OpenAIRE |
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