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Predicting bioavailability of PAHs and PCBs with porewater concentrations measured by solid-phase microextraction fibers.

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Predicting bioavailability of PAHs and PCBs with porewater concentrations measured by solid-phase microextraction fibers.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Lu, Xiaoxia Skwarski, Alison Drake, Brian Reible, Danny D.
Description	Country affiliation: United States Author Affiliation: Lu X ( Department of Civil, Architectural and Environmental Engineering, University of Texas at Austin, Austin, Texas, USA.)
Abstract	Bioaccumulation of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) was measured in the deposit-feeding oligochaete Ilyodrilus templetoni exposed for 28 d to Anacostia River sediment (Washington, DC, USA) and to an initially uncontaminated sediment from Brown Lake (Vicksburg, MS, USA) sequentially diluted with 3 to 25% contaminated New Bedford Harbor sediment (New Bedford, MA, USA). The Anacostia River sediment studies represented exposure to a historically contaminated sediment with limited availability, whereas exposure to the other sediment included both the historically contaminated New Bedford Harbor sediment and fresh redistribution of contaminants into the Brown Lake sediments. Organism tissue concentrations did not correlate with bulk sediment concentrations in the Anacostia River sediment but did correlate with the sequentially diluted sediment. Porewater concentrations measured via disposable solid-phase microextraction fiber (SPME) with polydimethylsiloxane (PDMS), however, correlated well with organism uptake in all sediments. Bioaccumulation was predicted well by a linear relationship with the product of porewater concentration and compound octanol-water partition coefficient (Anacostia, slope = 1.08, r² = 0.76; sequentially diluted sediments, slope = 1.24, r² = 0.76). The data demonstrate that the octanol-water partition coefficient is a good indicator of the lipid-water partition coefficient and that porewater concentrations provide a more reliable indicator of bioaccumulation in the organism than sediment concentrations, even when the route of uptake is expected to be via sediment ingestion.
File Format	HTM / HTML
ISSN	07307268
Issue Number	5
Volume Number	30
e-ISSN	15528618
Journal	Environmental Toxicology and Chemistry
Language	English
Publisher	Wiley
Publisher Date	2011-05-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Water Pollutants, Chemical Research Support, U.s. Gov't, Non-p.h.s. Solid Phase Microextraction Discipline Environmental Health Discipline Toxicology Polychlorinated Biphenyls Polycyclic Hydrocarbons, Aromatic Metabolism Oligochaeta Journal Article Geologic Sediments Chemistry Animals Analysis Discipline Chemistry Fresh Water
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis

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