Abstract

Objective To study the distribution characteristics of radon progeny at different air quality index (AQI) and evaluate health risks for the exposed population. Methods EQF3120 Monitor was used to monitor the concentration of radon and its daughters. The relevant air quality data was provided by the environmental monitoring station at Suzhou Industrial Park. SPSS 16.0 software was used for statistical description, principal component analysis and simple correlation analysis. Environmental radon exposure-caused effective dose to lung region was estimated by using the radon dose formulas. Results Radon progeny in fog haze weather in winter of Suzhou Industrial Park had relationships with NO2, SO2, O3, PM10 and PM2.5. The correlation coefficient of 214Bi were 0.741, 0.681, -0.431, 0.597 and 0.675. The correlation coefficient of radon progeny with PM2.5 was greater than that with PM10. When AQI>200, the effective dose to residents outdoor from radon and its short-lived progeny was 0.63 mSv/a. Conclusions Higher AQI results in higher concentration of attached radon progeny. There is little variation in concentration of unattached radon progeny. Fog and haze can increase exposure of the population to inhalated radon. Key words: Air quality index (AQI); Radon progeny; Aerosol; Haze weather

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