| Registro completo |
| Provedor de dados: |
Nature Precedings
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| País: |
United Kingdom
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| Título: |
Chlorinated Diphenyl Ethers in Sediments, Biota, and the Water Column from Coastal British Columbia, Canada
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| Autores: |
Sierra Rayne
Ikonomou G. Michael
Chris Garrett
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| Data: |
2007-08-12
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| Ano: |
2007
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| Palavras-chave: |
Chemistry
Earth & Environment
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| Resumo: |
Polychlorinated diphenyl ethers (PCDEs) are impurities in technical chlorophenol mixtures, are used as dielectric fluids in capacitors and as herbicides, antiseptics, food preservatives, and papers and textiles, and can be formed through the chlorination of organics in water and wastewater streams. Samples from semipermeable membrane devices (SPMDs), sediments, English sole, mussels, and Dungeness crab were collected from urban/industrial and remote sites along the marine coast of British Columbia and analyzed by congener-specific GC-MS analysis for mono- through deca-substituted PCDEs. Higher concentrations in biota and sediments were observed near urban/industrial areas, with evidence for food-chain biomagnification within major harbours. Correlations between size distributions and PCDE levels indicate these hydrophobic contaminants tend to preferentially partition into sediments with higher clay/silt fractions. Multivariate analysis of congener patterns shows distinct PCDE profiles among different species and environmental matrices, and evidence for favoured dechlorination pathways among the most commonly observed congeners in aquatic systems.
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| Tipo: |
Presentation
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| Identificador: |
http://precedings.nature.com/documents/690/version/1
oai:nature.com:10.1038/npre.2007.690.1
http://dx.doi.org/10.1038/npre.2007.690.1
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| Fonte: |
Nature Precedings
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| Direitos: |
Creative Commons Attribution 3.0 License
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