Human risk assessment of As,Cd, Cu and Zn in the abandoned metal mine site |
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Authors: | Email author" target="_blank">Jin-Soo?LeeEmail author Hyo-Taek?Chon Kyoung-Woong?Kim |
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Institution: | (1) School of Civil, Urban and Geosystem Engineering, College of Engineering, Seoul National University, Seoul, 151-744, Korea;(2) Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 500-712, Korea |
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Abstract: | The cancer risk and the non-cancer hazard index for inhabitants exposed to As, Cd, Cu and Zn in the soils and stream waters
of the abandoned Songcheon Au–Ag mine area were evaluated. Mean concentrations of As, Cd, Cu, Pb and Zn in agricultural soils
were 230, 2.5, 120, 160, and 164 mg kg−1, respectively. Mean concentrations of As, Cd and Zn of the water in the stream where drinking water was drawn was 246 μg
L−1, 161 μg L−1 and 3899 μg L−1, respectively. These levels are significantly higher than the permissible levels for drinking water quality recommended by
Korea and WHO. The resulting human health risks to farmers who inhabited the surrounding areas due to drinking water were
summarized as follows: (1) the non-cancer health hazard indices showed that the toxic risk due to As and Cd in drinking water
were 10 and 4 times, respectively, greater than those induced by the safe average daily dosages of the respective chemicals.
(2) the cancer risk of As for exposed individuals through the drinking water pathway was 5 in 1000, exceeded the acceptable
risk of 1 in 10,000 set for regulatory purposes. |
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Keywords: | arsenic cadmium cancer risk exposure pathway hazard index risk assessment |
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