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| Study on Radon and Its Progeny Level and Influencing Factors in Sunlight Greenhouses |
| HOU Chang-song, ZHANG Qing-zhao, CUI Hong-xing, SHANG Bing |
| National Institute for Radiological Protection(NIRP), Chinese Center for Disease Control and Prevention, Beijing 100088 China |
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Abstract Objective Analysis of the concentrations of radon, radon progeny and PM2.5 in the sunlight greenhouse. Methods The concentrations of radon, radon progeny and PM2.5 in three sunlight greenhouses in Beijing area were measured by radon and progeny measurement instrument, electret detector and particle concentration measurement instrument. Results The results showed the average radon concentration CRn was (135±41.9) Bq/m3,(43.1±8.9) Bq/m3 and (45.5±15.9) Bq/m3(n=12,28.1~169 Bq/m3). Indoor PM 2.5 concentration range was from 28~248 μg/m3. Conclusion Radon progeny concentration Cp was significantly correlated with PM 2.5 concentrations indoor and outdoor. The fog and haze weather cause Cp increased in the air, then F value increased. The mean F value in sunlight greenhouse and the control room was 0.62±0.13(n=24,0.42~0.94) and (0.61±0.16) (n=22,0.36~0.94), it is significantly higher than the 0.40 typical values of the world. Soil is an important source to sunlight greenhouses. Radon concentration inside is related to the exposure of soil.
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Received: 02 March 2016
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