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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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        Abstract - Issue Sep 2015, 36 (5)                                                                                                             Back

nstantaneous and historical temperature effects on a-pinene

Distribution of heavy metals in internal organs and tissues of Korean molluscan shellfish and potential risk to human health


Jong Soo Mok1*, Ji Young Kwon2, Kwang Tae Son2, Woo Seok Choi2, Poong Ho Kim1, Tae Seek Lee2 and Ji Hoe Kim2

1Southeast Sea Fisheries Research Institute, National Fisheries Research and Development Institute, 361,

Youngun-ri, Sanyang-up, Tongyoung 650-943, Republic of Korea

2Food Safety Research Division, National Fisheries Research and Development Institute, 408-1, Sirang-ri, Gijang-up,

Gijang-gun, Busan 619-705, Republic of Korea

*Corresponding Author E-mail :




Publication Data

Paper received:

03 July 2014


Revised received:

29 January 2015



20 March 2015



Molluscan shellfish (gastropods and bivalves) were collected from major fish markets on the Korean coast and analyzed for mercury by direct Hg analyzer and for other metals, such as cadmium, lead, chromium, silver, nickel, copper and zinc, using inductively coupled plasma mass spectrometry. Distribution of heavy metals in muscles, internal organs and whole tissues were determined and a potential risk assessment was conducted to evaluate their hazard for human consumption. Heavy metals were accumulated significantly higher (P < 0.05) in internal organs than in muscles for all species. The mean Cd level, which had the highest level of three hazardous metals (Cd, Pb, and Hg) in all internal-organ samples were above the regulatory limit of Korea and the mean level in whole tissue samples of the selected gastropod species, bay scallop and comb pen shell, exceeded the limit (except in a few cases). The sum of the estimated dietary intake of Cd, Pb and Hg for each part of all tested species accounted for 1.59-16.94, 0.02-0.36, and 0.07-0.16% respectively, of the provisional tolerable daily intake adopted by the Joint FAO/WHO Expert Committee on Food Additives. The hazard index for each part of gastropods and bivalves was below 1.0, however, the maximum HI for internal organs of all analysed species was quite high (0.71). These results suggest that consumption of flesh after removing the internal organs of some molluscan shellfish (all gastropod species, bay scallop and comb pen shell) is a suitable way for reducing Cd exposure.    



 Key words

Distribution, Heavy metal, Korea, Molluscan shellfish, Risk assessment



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