空气质量指数与室外氡子体浓度的相关性研究

Correlation between air quality index and outdoor radon progeny concentration

目的 研究不同空气质量指数（air quality index,AQI）下氡子体的分布特征,评价雾霾天气暴露人群的健康风险.方法 利用EQF3120测量仪监测放射性核素氡及其子体浓度,空气质量指标数据由苏州工业园区环境监测站提供.运用SPSS 16.0对氡及其子体与空气质量指标等数据进行统计描述、主成分分析及简单相关分析.运用氡剂量计算公式估算环境氡暴露致肺部区域有效剂量.结果 苏州市工业园区冬季雾霾天气结合态氡子体与NO2、SO2、O3、PM10和PM2.5均存在相关关系,214Bi与其相关系数分别为0.741、0.681、-0.431、0.597和0.675;且结合态氡子体与PM2.5的相关系数＞与PM10的相关系数;当AQI＞ 200,居民在室外接收氡及其短寿命子体的有效剂量为0.63 mSv/年.结论 随着AQI的增大,结合态氡子体浓度增大,未结合态氡子体浓度变化不大;雾霾天气增加了暴露人群吸入氡的辐射风险.

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.