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The West Falmouth Oil Spill after Thirty Years: The Persistence of Petroleum Hydrocarbons in Marsh Sediments

Reddy, Christopher M., Eglinton, Timothy I., Hounshell, Aubrey, White, Helen K., Xu, Li, Gaines, Richard B., Frysinger, Glenn S.·2002·Environmental Science & Technology

Abstract

The long-term fate of petroleum hydrocarbons in marsh sediments (West Falmouth, MA) contaminated in 1969 by the spill of the barge Florida was investigated. A 36-cm-long sediment core was collected in August 2000, and sediment extracts were analyzed by gas chromatography (GC) and comprehensive two-dimensional gas chromatography (GC x GC). The latter technique is capable of separating 1 order of magnitude more compounds than the former and was used to observe whether any compositional changes in the unresolved complex mixture (UCM) occurred. No evidence of petroleum residues was detected in the top 6 cm (0-6 cm) and the lower 8 cm (28-36 cm) of the core. However, the central sections 16-28 cm) were dominated by a UCM in the boiling range of n-C13-n-C25 alkanes, consistent with a No. 2 fuel oil source. The 12-14- and 14-16-cm sections had the highest concentrations of UCM approximately 8 mg g(-1)). These values are similar to concentrations observed shortly after the spill. Initial GC x GC analysis revealed that only the n-alkanes were completely degraded, and contrary to previous studies, pristane and phytane as well as numerous other branched alkanes are still present in the sediments. These results suggestthatatthis site hydrocarbon contamination will persist indefinitely in the sedimentary record.

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Metadata

Authors
Reddy, C. M., Eglinton, T. I., Hounshell, A., White, H. K., Xu, L., Gaines, R. B., & Frysinger, G. S.
Venue
Environmental Science & Technology
Published
2002-09-27
Volume
36
Issue
22
Pages
4754-4760
ISSN
  • 0013-936X (ISSN-L)
  • 1520-5851
OpenAlex
W2076153175
Cited by
314
References
12
FWCI
8.38
Type
journal article
Language
en
Open access
closed

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