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Presented at the 13th Biennial International Conference, Estuarine Research Federation, Corpus Christi, TX, USA, November 12-16, 1995.
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Environmental Chemistry
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A principal-component and least-squares method for allocating polycyclic aromatic hydrocarbons in sediment to multiple sources†
Article first published online: 26 OCT 2009
DOI: 10.1002/etc.5620160605
Copyright © 1997 SETAC
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How to Cite
Burns, W. A., Mankiewicz, P. J., Bence, A. E., Page, D. S. and Parker, K. R. (1997), A principal-component and least-squares method for allocating polycyclic aromatic hydrocarbons in sediment to multiple sources. Environmental Toxicology and Chemistry, 16: 1119–1131. doi: 10.1002/etc.5620160605
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Publication History
- Issue published online: 26 OCT 2009
- Article first published online: 26 OCT 2009
- Manuscript Accepted: 23 OCT 1996
- Manuscript Received: 13 MAY 1996
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Keywords:
- Polycyclic aromatic hydrocarbons;
- Oil spill;
- Exxon Valdez;
- Principal-component analysis;
- Fingerprinting
Abstract
A method was developed to allocate polycyclic aromatic hydrocarbons (PAHs) in sediment samples to the PAH sources from which they came. The method uses principal-component analysis to identify possible sources and a least-squares model to find the source mix that gives the best fit of 36 PAH analytes in each sample. The method identified 18 possible PAH sources in a large set of field data collected in Prince William Sound, Alaska, USA, after the 1989 Exxon Valdez oil spill, including diesel oil, diesel soot, spilled crude oil in various weathering states, natural background, creosote, and combustion products from human activities and forest fires. Spill oil was generally found to be a small increment of the natural background in subtidal sediments, whereas combustion products were often the predominant sources for subtidal PAHs near sites of past or present human activity. The method appears to be applicable to other situations, including other spills.