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Polychlorinated biphenyls (PCBs) in commonly consumed seafood from the coastal area of Bangladesh

Publication Date - 2018-11-13 00:00:00

Publication Title : Polychlorinated biphenyls (PCBs) in commonly consumed seafood from the coastal area of Bangladesh

Publicationed By : Dr. Md Saiful Islam

Publication Publication Date : 2018-11-13 00:00:00

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Publication Description :

Dietary intake is the most important route of polychlorinated biphenyls (PCBs) exposure and seafood is the major dietary  component for the coastal populations. It is, therefore, an urgent need to assess the levels of PCBs in seafood. A comprehensive  congener-specific evaluation of PCBs was carried out for the first time in Bangladesh. All 209 congeners of PCBs in 48 seafood  samples (5 finfish and 2 shellfish species) collected in winter and summer of 2015 were measured by GC-MS/MS. Regardless of  season and site, the ΣPCBs (ng/g wet weight) in finfish and shellfish were in the range of 6.4–86.2 and 3.8–37.7, respectively.  The results were comparable to or higher than those observed in other studies worldwide, particularly from Spain, China, Korea,  Thailand, and Hong Kong. No significant seasonal variation was observed in the levels of ΣPCBs in the examined seafood  (p > 0.05); however, interspecies differences were significant (p < 0.05). Nonetheless, spatial distribution revealed seafood collected  from the areas with recent urbanization and industrialization (Chittagong, Cox’s Bazar, and Sundarbans) were more  contaminated with PCBs than the area unaffected by industries (Meghna Estuary). Moderately chlorinated (4–6 Cl) homologs  dominated the PCB profiles. The congener profile and homolog composition revealed that the source origin of PCBs in the  Bangladeshi seafood was related to mixtures of technical PCBs formulations. The dietary exposure assessment revealed that the  coastal residents are sufficiently exposed to the dietary PCBs through seafood consumption which may cause severe health risk  including dioxin-like toxic effects.

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