摘要
目的在不同浓度大气PM_(2.5)水平下,比较不同出行方式的PM_(2.5)个体暴露水平,并进一步比较地铁站不同位置的PM_(2.5)浓度,以期为城市居民选择适宜的出行方式提供科学依据。方法于2015年12月30日至2016年1月4日,选择北京市城区的某条路线作为研究地点,使用便携式PM_(2.5)监测仪同时测量步行、乘坐公交车和地铁3种出行方式的PM_(2.5)个体暴露水平;对地铁站台、安检处和地铁车厢内的PM_(2.5)浓度进行同步监测并比较。结果在同一研究时期,步行、乘坐公交车和地铁测得的PM_(2.5)个体暴露浓度均值分别为219.34、209.61、167.56μg/m3。当大气PM_(2.5)浓度较低时(≤60μg/m3),乘坐地铁的PM_(2.5)个体暴露水平高于步行和乘坐公交车;当大气PM_(2.5)浓度较高时(>100μg/m3),乘坐地铁的个体PM_(2.5)暴露水平明显低于步行和公交车,差异均有统计学意义(P<0.05)。监测期间地铁站台、安检处和车厢内的PM_(2.5)浓度均值分别为196.90、170.20、136.82μg/m3。结论在不同的大气PM_(2.5)污染水平下,不同出行方式的人群PM_(2.5)个体暴露水平不同。
Objective To compare personal exposure to air particulate matter（PM_（2.5）） by three commuting modes under different levels of ambient PM_（2.5）. Furthermore, PM_（2.5）concentrations at three places in subway station were compared. Methods A route at urban area in Beijing was chosen. Personal PM_（2.5）exposures by three commuting modes including walking, bus and subway were measured at the same time by using portable PM_（2.5）monitors, between December 30, 2015 and January 4, 2016. PM_（2.5）concentrations at three places in subway station, including security checkpoint, platform and subway car were measured and compared. Results During the same study period, means of personal PM_（2.5）exposures were 219.34 μg/m3, 209.61 μg/m3and167.56 μg/m3 for walking, bus and subway respectively. Further comparison showed that subway commuter had higher exposure compared with walker and bus commuter under low ambient PM_（2.5）concentration（≤60 μg/m3）; While subway commuter had the lowest exposure under high ambient PM_（2.5）concentration（〉100 μg/m3）. During the study period, means of PM_（2.5）concentrations were 196.90 μg/m3, 170.20 μg/m3, 136.82 μg/m3 at platform, security checkpoint and subway car respectively. Conclusion Commuters using three transport modes have different personal PM_（2.5）exposure under different ambient PM_（2.5）concentrations.These results will be helpful for citizens to choose commuting mode scientifically.
出处
《环境与健康杂志》
CAS
北大核心
2016年第8期659-662,共4页
Journal of Environment and Health
基金
国家自然科学基金重大研究计划(91543112)
中华医学基金会项目(CMB 15-228)
关键词
PM2.5
个体暴露
出行方式
交通
PM2.5
Personal exposure
Commuting mode
Transportation
