Polychlorinated dibenzo-p-dioxins and dibenzofurans detected in bivalve samples from the NOAA National Status and Trends Program

Wade, Terry L.; Sweet, Stephen T.; Sericano, José L.; DeFreitas, Debra A.; Lauenstein, Gunnar G.

Polychlorinated dibenzo-p-dioxins and dibenzofurans detected in bivalve samples from the NOAA National Status and Trends Program

2014

Wade, Terry L. | Sweet, Stephen T. | Sericano, José L. | DeFreitas, Debra A. | Lauenstein, Gunnar G.

Bivalve samples from 142 sites were analyzed to determine the concentration and toxicity equivalents (TEQ) of dioxins and furans (D/F) as part of the NOAA National Status and Trends Program. The total concentration of 17 D/F ranged from not detected to 203pg/g wet weight of tissue. Octachlorinated dibenzo-p-dioxin, OCDD, had a concentration range from not detected to 189pg/g and a mean concentration of 8.65pg/g. OCDD was the dominant D/F compound detected and accounted for, on average, over 70% of the total D/F concentration. The TEQ (compared to 2,3,7,8-TCDD) ranged from 0.12 to 7.32pg TEQ/g. The TEQ for 39% of the bivalves analyzed were below 0.238pg TEQ/g. TEQ above human consumption advisory concentration of 1.2pg TEQ/g were found in 9.3% of the samples analyzed. TEQ for D/F indicate very limited human health concerns from consumption of bivalves at most of the locations sampled.

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