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Metal levels in seafood of the Huludao coast and associated health risks.

GAO Mi1, WU Xing1, Paul L. Klerks2, CHEN Hong-xing1, XIE Ling-tian1*   

  1. (1 Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; 2 Department of Biology, University of Louisiana at Lafayette, P.O. Box 42451, Lafayette, LA 70504, USA)
  • Online:2016-01-10 Published:2016-01-10

Abstract: In this paper, levels of 6 heavy metals in 6 species from Huludao coast were determined and compared with those in species from other coasts of China. We used daily food intake (DI), target hazard quotients (THQ) and target carcinogenic risk (TR) to evaluate the health risks of local residents via consumption of seafood. Our results showed that there was a decreasing order of heavy metal levels in these organisms: Zn>Cu>Ni>Cd>Cr>Pb. Littorina brevicula and Rapana venosa were seriously polluted by Cd. Liza carinatus was also polluted by Zn. However, metal levels in Ulvaceae, Mytilus galloprovincialis and Charybdis japonica were relatively low. Our comparison of estimated daily intake values for human consumption of the seafood species with the FAOrecommended daily dietary allowances indicated potential health risks associated with the intake of Cd from M. galloprovincialis, L. brevicula and R. venosa. An analysis of THQ identified a noncarcinogenic health risk from Cd in M. galloprovinciali, L. brevicula and R. venosa. Moreover, an analysis of cancer risk from Pb ingestion detected an increased risk for consumption of L. brevicula and R. venosa. Health risks seemed especially pronounced for consumption of L. brevicula and R. venosa. In addition, adults had higher risks than children due to more food intake and longer exposure time. The seafood advisory may be warranted for these mollusks.

Key words: bryophyte, coarse woody debris, gap, alpine forest., nutrient