Polybrominated dibenzo-p-dioxins and furans (PBDD/Fs) have a similar structure to polychlorinated dibenzo-p-dioxins and furans (PCDD/Fs), thus exhibiting similar toxic effects and bioaccumulation characteristics in organisms.They can pose risks to humans through dietary intake via aquatic products and other sources.To investigate the dietary exposure risks of PCDD/Fs and PBDD/Fs in aquatic products from the East China Sea to the human body, this study used HRGC-HRMS to detect 14 PBDD/Fs congeners and 17 PCDD/Fs congeners in 24 species of aquatic products from the East China Sea, and calculated their toxic equivalent quantity (TEQ).The aim was to understand their potential sources, exposure levels, and to conduct risk assessment.The results showed that the detection rate of PCDD/Fs and PBDD/Fs in all aquatic products was 100%.The TEQ of fish, mollusks, crustaceans, and algae samples was 0.02-0.48, 0.05-1.55, 0.05-0.41, and 0.02-0.08 pg WHO-TEQ/g on a wet weight basis, respectively.The concentration of PBDD/Fs in aquatic products was higher than that of PCDD/Fs.In the risk assessment, the intake, daily safe exposure dose, and carcinogenic risk for each age group were all within the safe range specified by the World Health Organization, and the hazard quotient for all population groups was much less than 1.Except for mollusks and algae, the TEQ of other aquatic species shows ΣPCDD/Fs＞ΣPBDD/Fs.The daily exposure amounts in descending order were children, adolescents, and adults, and the main contributing source for these three population groups was mollusks.In conclusion, the TEQ of PCDD/Fs and PBDD/Fs in east China sea aquatic products was relatively low, and the exposure risk to eastern coastal residents was low, remaining at a safe level.
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