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This study analyzed the concentrations of potassium, thorium and uranium of the atmospheric PM 10 aerosols which were collected at Gosan of Jeju Island during the year of 2014. The mean mass concentration of PM 10 was 47.31 μg/m 3 . The mean radioactive concentrations of 40 K, 232 Th and 238 U were 7.89, 0.25 and 0.30 μBq/m 3 , respectively. The 232 Th/ 238 U activity concentration ratio of PM 10 was 0.830. The 232 Th/ 238 U ratio during Asian Dust days is 1.073, which is higher than those in other atmospheric conditions. The concentration ratio of 232 Th/ 238 U was 0.902 in China continent.

journal of radioanalytical and nuclear chemistry

Analysis of the natural radioactivity concentrations of the fine dust samples in Jeju Island, Korea and the annual effective radiation dose by inhalation