Seasonal variation of polychlorinated biphenyl congeners in surficial sediment, trapped settling material, and suspended particulate material in Lake Michigan, USA
| Autor: | Sander D. Robinson, Patricia L. van Hoof, Brian J. Eadie, Peter F. Landrum |
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| Rok vydání: | 2007 |
| Předmět: |
chemistry.chemical_classification
Geologic Sediments Health Toxicology and Mutagenesis Sediment Polychlorinated biphenyl Fresh Water Seasonality medicine.disease Polychlorinated Biphenyls Diagenesis chemistry.chemical_compound Congener chemistry Settling Environmental chemistry medicine Environmental Chemistry Environmental science Organic matter Particulate Matter Particle size Seasons Great Lakes Region Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Environmental toxicology and chemistry. 27(2) |
| ISSN: | 0730-7268 |
| Popis: | A unique time series of surface sediment, trapped settling material, and suspended particulate material polychlorinated biphenyl (PCB) samples were collected at a 45-m deep site off Grand Haven (MI, USA) over a 14-month period. Both concentrations and congener distributions remained constant for the sediments, although there were seasonal and interannual variability in the other matrices. Trapped settling material and suspended particulate material PCB concentrations were substantially lower (~50%) in 1997 than in the samples from December 1997 through July 1998. The cause could not be determined from the data collected, but there were some very large storms during the winter-spring period of 1998, resulting in major sediment resuspension throughout the southern basin. Observed seasonal variation in PCB concentration and congener distribution on particles likely was due to the changes in particle composition. These include particle size and the source of particles (such as the amount of resuspended sediment in trapped settling material), and the role of diagenesis of the organic matter on particles. |
| Databáze: | OpenAIRE |
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