Exposure And Assessment Of Persistent Organic Pollutants(POPs)in Seafood

In the past several decades, due to extensive use of pesticides in China, the construction of the factories and power plants, and some unreasonable sewage, resulting in a large number of POPs into the environment, and finally pooled into the ocean and caused ocean bioaccumulation. As in recent years, POPs residues detection in food has become more stringent in the European Union and other countries. As in recent years, the European Union and other countries of import and export trade of POPs residues in food detection more stringent, resulting in serious technical barriers in China’s imports and exports. Therefore, this study measured the residual levels of POPs in some Bohai bay seafood, and provided a preliminary assessment of the risk to human health under the level of exposure.In the paper, independently developed instrument and the method of Acidic silica gel have been adopted for cleanup and separation, and GC-ECD has been used for analysis of POPs, the recoveries of PCBs obtained in71%to103%, RSD is between0.8%to27%. Because concentrated sulfuric acid has damaging results on Aldrin, Isodrin, Dieldrin and endrin, quality control can not be done. The recoveries of other methods for OCPs are78%to102%, and RSD is between0.8%to16%.In the paper, residues level of PCBs and OCPs of12species such as small yellow croaker, snakehead and bass in Yingkou, Lvshun, Zhuanghe and Jinzhou were quantified, respectively.100%is checked out forDT andCH in four sampling sites, The maximum ofCH is checked out in Yingkou:224.35μg/kg; The maximum of∑DDT is checked out in Lvshun:94.21μg/kg; The maximum of∑PCB is checked out in Jinzhou:57.29μg/kg. The source analysis of∑HCH and∑DDT showed that HCH is increasing and DDT is mostly from the historic DDT residues in this area. The levels of HCB,∑DDT,∑HCH, endosulfan, heptachlor and∑PCB of fish samples were range from nd-55.16,4.18-211.49, nd-300.66, nd-18.48, nd-8.51,1.34-99.23μg/kg, respectively. Compared with the maximum residual standard of EU,∑HCH and∑DDT slightly exceed a maximum residues value, HCB exceeded more serious, endosulfan and heptachlor were not exceeded. For PCB detectable concentrations relative to GB, The List Certainly Japan, US-EPA, Australian and New Zealand Standards were not exceeded. Human health risk assessment of non-cancer diseases indicates:for∑DDT,∑HCH, heptachlor and HCB, there are potential human health risks to eat small yellow croaker, arrow fish, sea bass and barracuda. RQ-low forCBs were below1, indicating that residues in fish can not cause non-cancerous diseases. Human health risk assessment of cancerous diseases indicates:HQ-high for DDTs and HCHs of all samples was above1; Health risk is unlikely to occur to less fish-eating populations who eat snakehead, bighead and trash fish. For dioxin-like PCB their cancer risk would be acceptable.