The complex influence of filtration operation on indoor 222Rn (radon) and 220Rn (thoron) concentration
Since the proximate source of dose to the cells of the bronchial epithelium is caused by the airborne decay products of radon and thoron, it is in some situations more practical to remove the daughter products from the air in the form of filtration with pump and High Efficiency Particulate Air (HEPA) filters. However, the filtration process induced some complex influence on indoor radon, thoron concentration despite the high performance of removing the decay products of radon and thoron. It is found that in the test range of filtration rates from 0.2–0.8 h–1, the thoron concentration was increased to similar extents; for radon, except the case of 0.2 h–1, the higher filtration rates (0.4–0.8 h–1) slightly decreased the radon concentration, and the higher filtration rates, the lower average concentrations of the radon. Discrimination between the different responses of radon and thoron might be caused by their wide disparity in half-life thus varied mechanism of exhalation and spatial distribution in the case of filtration operation.
filtration radon thoron meteorological parameters
Wang Jin Liu Juan Chen Yongheng Meisenberg Oliver Tschiersch Jochen Li Xiangping Wang Chunlin Qi Jianying
Guangzhou UniversityGuangzhou, 510006, China Institute of Radiation ProtectionHelmholtz Zentrum MünchenNeuherberg, 85764, Germany School of Chemistry & Chemical EngineeringGuangzhou UniversityGuangzhou, 510006, China Guangdong Provincial Academy of EnvironmentalScienceGuangzhou, 510045, China South China Institute of Environmental Science, Ministry of Environmental Protection (MEP) Guangzhou
国际会议
三亚
英文
1148-1151
2012-01-06（万方平台首次上网日期，不代表论文的发表时间）