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Uptake and Depuration of PCB-153 in Edible Shrimp Palaemonetes Varians and Human Health Risk Assessment

Uptake and Depuration of PCB-153 in Edible Shrimp Palaemonetes Varians and Human Health Risk Assessment

T F Grilo, P G Cardoso, P Pato, A C Duarte, M A Pardal

Ecotoxicol Environ Saf. 2014 Mar;101:97-102.

PMID: 24507133

Abstract:

A medium-term mesocosm exposure study was conducted to elucidate bioaccumulation and depuration of polychlorinated biphenyl congener 153 (PCB-153) in edible shrimp Palaemonetes varians. Over the 15-day exposure period, shrimp under different exposure concentrations exhibited a significant increase in PCB-153 concentration compared with control organisms. Distinct bioaccumulation patterns and uptake rates were observed depending on the exposure concentrations. For low PCB-153 exposure levels (0.25μgL(-1)), accumulation followed a saturation model, reaching an apparent steady state after fifteen days exposure. For intermediate (2.5μgL(-1)) and high PCB-153 levels (25μgL(-1)), accumulation was faster and linear. In addition, the bioaccumulation rate was not proportional to PCB-153 concentration, and the bioaccumulation was higher at intermediate exposure concentrations. Regarding the depuration phase, P. varians lost up to 30% of PCB-153 after 72h and levels continued slowly to decrease until the end of the 30-d experimental period. However, PCB-153 levels in shrimp did not reach background values, and those exposed to moderate and high PCB-153 concentrations presented contamination levels much higher than the regulatory limit for human food consumption (75ngg(-1) ww for Σ6 PCB).

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AS2121255	PCB Congeners in Shrimp			Price
AS26239	PCB Congeners in Shrimp - PT			Price

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