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| Radioactivity level and health risk assessment of artificial nuclide 137Cs in food in Guangxi Province |
| ZHAO XinChun, FENG LanYing, MA YiLong, LEI JiaJie, LU XiuFang, CHEN ZhangFan, QIN ZhiYing, XIE Ping |
| Guangxi Zhuang Autonomous Region Center for Disease Control and PreventionGuangxi, Nanning 530028 China |
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Abstract Objective To investigate and master the radioactivity level of artificial radionuclide 137Cs in Guangxi food and estimate the committed effective dose of dietary intake in different populations and assess the health risk.Methods According to the national standards GB/T 16145-1995 "gamma ray spectrum analysis method for radionuclide in biological samples" and GB/T 11713-2015 "general method of gamma spectrometry analysis of high purified Ge", 202 samples of 7 categories (including grain, vegetables, seafood, freshwater fish, poultry meat, tea and milk powder)collected in Guangxi were monitored and determined. The data were compared and evaluated.Results The detection rate of 137Cs was 91.6% (185/202), the specific activity ranged from 0.011 to 0.931 Bq/kg (for fresh weight). The content of 137Cs in tea was the highest in the samples, and the mean value in tea was 0.263±0.067 Bq/kg and ranged from 0.164 to 0.735 Bq/kg. The average annual committed effective dose by 137Cs intake for school-age infants, children, young men/male adult and young women/female adults was 0.141μSv/a, 0.189μSv/a, 0.251μSv/a and 0.152 μSv/a, respectively. The risk of lifetime cancer caused by 137Cs intake was(0.74~1.33)×10-6.Conclusion 137Cs radioactivity level in Guangxi food is far below the national standard limit, the dose burden for the population is slight and it will not affect human health.
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Received: 14 March 2018
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