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Associations between dioxins/furans and dioxin-like PCBs in estuarine sediment and blue crab

Water, Air, & Soil Pollution
By: , , , , and 
https://doi.org/10.1007/s11270-011-0837-2

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Abstract

The objective of the present study was to evaluate the relationships between the quantity, toxicity, and compositional profile of dioxin/furan compounds (PCDD/Fs) and dioxin-like polychlorinated biphenyls (DL-PCBs) in estuarine sediment and in the blue crab (Callinectes sapidus). Sediment and blue crab samples were collected in three small urban estuaries that are in relatively close proximity to each other. Results show that differences between PCDD/F and DL-PCB mass concentrations and total toxic equivalents (TEQ) toxicity in sediments of the three estuaries are reflected in those of the blue crab. TEQs are higher in the hepatopancreas of the crabs than in the sediment, but the concentration factor is inversely proportional to the TEQ in the sediments. Congener profiles in the crabs are systematically different from those in the sediments, and the difference is more pronounced for PCDD/Fs than for DL-PCBs, possibly due to differences in metabolization rates. Compared with sediment profiles, more lesser-chlorinated PCDD/Fs that have higher TEFs accumulate in crab hepatopancreas. This selective bioaccumulation of PCDD/Fs results in a TEQ augmentation in crab hepatopancreas compared with sediments. The bioaccumulation in the blue crab is also selective for PCDD/Fs over DL-PCBs.

Publication type Article
Publication Subtype Journal Article
Title Associations between dioxins/furans and dioxin-like PCBs in estuarine sediment and blue crab
Series title Water, Air, & Soil Pollution
DOI 10.1007/s11270-011-0837-2
Volume 222
Issue 1-4
Year Published 2011
Language English
Publisher Springer
Contributing office(s) Patuxent Wildlife Research Center, Contaminant Biology Program
Description 17 p.
First page 403
Last page 419
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