Dietary intake and potential health risk of DDTs and PBDEs via seafood consumption in South China.
A total of 602 seafood samples, including fish, shrimps, crabs and molluscs, were analyzed for a suite of persistent halogenated compounds. The residual levels of DDTs (sum of o,p'- and p,p'-DDT, DDD, and DDE) and polybrominated diphenyl ethers (PBDEs) varied significantly among different species, and ranged from non-detectable (nd) to 699 ng/g and nd to 5.93 ng/g, respectively. Comparison of the levels of DDTs and PBDEs in mussel samples worldwide suggested that South China is probably one of the most DDT-polluted areas, but is moderate at most in terms of PBDE contamination. Combined with a recent dietary survey at the same sampling locations, dietary intakes of DDTs and PBDEs by local residents via seafood consumption for all age groups were estimated to be 147-564 and 4.7-18.5 ng/day, or 8.5-12.9 and 0.27-0.46 g/kg bw/day, respectively. Among the different seafood types, fish contributed the largest portion of the dietary intakes of DDTs (57%), followed by molluscs (38%). Similarly, the dietary intakes of PBDEs were also dominated by fish (45%) and molluscs (45%). Assessment based on several available guidelines suggested that though no significant human health risk associated with the dietary intake of PBDEs, a lifetime cancer risk from dietary exposure to DDTs remains a probability. Because dietary intake of DDTs was dominated by fish and molluscs, added concern should be paid to fish and molluscs.
Guo
Jianyang
J
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
Wu
Fengchang
F
Shen
Rulang
R
Zeng
Eddy Y
EY
D000818:Animals; D002681:China; D003634:DDT / Q000032:analysis / Q000633:toxicity*; D004032:Diet; D004781:Environmental Exposure / Q000706:statistics & numerical data*; D004785:Environmental Pollutants / Q000032:analysis / Q000633:toxicity*; D005506:Food Contamination / Q000706:statistics & numerical data*; D008401:Gas Chromatography-Mass Spectrometry; D055768:Halogenated Diphenyl Ethers / Q000032:analysis / Q000633:toxicity*; D006801:Humans; D011634:Public Health; D018570:Risk Assessment; D017747:Seafood / Q000032:analysis*
D004785:Environmental Pollutants; D055768:Halogenated Diphenyl Ethers; C086401:pentabromodiphenyl ether; D003634:DDT