患心血管病老年人夏季PM2.5和CO的暴露特征及评价

运用室内外环境监测与问卷调查法相结合的研究方法,对北京市某社区33名患心血管疾病的老年人夏季PM2.5、CO的暴露特征作了研究评价.结果表明,老年人夏季PM2.5、CO的24h个体平均暴露浓度分别为89.6μg/m3,1.9×10-6.PM2.5室内外浓度呈现明显的时间变化特征,并受到气象因素及室内外源排放的共同影响.对老年人群室内外与固定站点CO、PM2.5质量浓度变化的相关性分析显示,室外及固定站点的PM2.5浓度受区域污染源影响较大,CO浓度受局地源影响较大;大气PM2.5可能是影响该社区老年人健康的主要污染物.

Characterization and assessment of exposure to PM2.5 and CO for a cardiovascular elderly panel in summer in Beijing

Exposure levels of PM2.5, CO of a panel including 33 cardiovascular elderly subjects in summer in one community of Beijing was studied. Concurrent fixed site, outdoor and indoor pollution were monitored, and time-activity data were collected from each subject. Twenty-four hour averaged exposure concentrations of PM2.5, CO for the elderly were 89.6μg/m3 and 1.9×10-6, respectively. The outdoor and indoor concentrations of PM2.5 showed temporal variation, and were affected by meteorological conditions, as well as indoor and outdoor emission sources. The correlations of indoor, outdoor and fixed site concentrations showed that outdoor and fixed site CO was more affected by local sources, while PM2.5 was not. PM2.5 might be the main pollutant contributing to the adverse health effects on cardiovascular elderly in Beijing.