熊秀琴, 李怡雪, 赵昂, 王会, 潘小川. 北京市地铁车厢内PM2.5污染情况及通勤人员的相关认知[J]. 环境与职业医学, 2018, 35(7): 583-588. DOI: 10.13213/j.cnki.jeom.2018.17637
引用本文: 熊秀琴, 李怡雪, 赵昂, 王会, 潘小川. 北京市地铁车厢内PM2.5污染情况及通勤人员的相关认知[J]. 环境与职业医学, 2018, 35(7): 583-588. DOI: 10.13213/j.cnki.jeom.2018.17637
XIONG Xiuqin, LI Yi-xue, ZHAO Ang, WANG Hui, PAN Xiao-chuan. PM2.5 concentrations in subway cars in Beijing and related awareness of subway passengers[J]. Journal of Environmental and Occupational Medicine, 2018, 35(7): 583-588. DOI: 10.13213/j.cnki.jeom.2018.17637
Citation: XIONG Xiuqin, LI Yi-xue, ZHAO Ang, WANG Hui, PAN Xiao-chuan. PM2.5 concentrations in subway cars in Beijing and related awareness of subway passengers[J]. Journal of Environmental and Occupational Medicine, 2018, 35(7): 583-588. DOI: 10.13213/j.cnki.jeom.2018.17637

北京市地铁车厢内PM2.5污染情况及通勤人员的相关认知

PM2.5 concentrations in subway cars in Beijing and related awareness of subway passengers

  • 摘要: 目的 调查北京市地铁车厢内PM2.5污染状况,并与室外环境中PM2.5浓度比较;了解北京市地铁通勤人员对地铁内空气污染的认知及防护情况。

    方法 于2016年10月-2017年4月选取北京市10条地铁线路,每周调查一次,在周五晚高峰时段(16:30-20:30)测量地铁车厢内PM2.5浓度(春节假期除外),并与对应时间段室外环境的PM2.5浓度进行对比。使用问卷调查地铁通勤人员对地铁内和室外空气污染的认知及防护行为。

    结果 10条线路的地铁车厢内PM2.5浓度中位数为133μg/m3,明显高于室外环境PM2.5浓度中位数(61μg/m3),差异具有统计学意义(P < 0.001)。共计调查618人,仅128名(20.7%)调查对象能正确认知地铁内比室外空气污染更严重。449名(72.7%)调查对象会使用口罩进行空气污染防护,其中仅96人(21.4%)会在雾霾天时在地铁内佩戴口罩。对地铁空气污染状况认知不同者,佩戴口罩的频率存在差异(P=0.008)。认为室外空气污染更严重的调查对象在地铁内从不佩戴口罩的比例(136/340,40.0%)明显高于认为地铁内空气污染更严重的调查对象(19/94,20.2%)。

    结论 北京市晚高峰时段地铁车厢内的PM2.5浓度总体高于室外环境,而多数地铁通勤人员对此缺乏正确认知,在地铁内佩戴口罩比例偏低,相关防护意识有待加强。

     

    Abstract: Objective To monitor the PM2.5 levels in subway cars in Beijing and compare with the PM2.5 levels outside subway stations, and investigate related awareness and protection in subway passengers.

    Methods A total of 10 subway lines in Beijing were selected. PM2.5 concentrations in subway cars were monitored once a week during the evening rush hours (16:30-20:30) on Friday from October 2016 to April 2017 (except the Spring Festival), and compared with the ambient PM2.5 concentrations at the same time outside subway stations. A questionnaire survey on the awareness and protective actions related to air pollution both inside and outside subways were conducted among subway passengers.

    Results The median of PM2.5 concentration in subway cars of 10 subway lines was 133 μg/m3, much higher than that outside subway stations (61 μg/m3) (P < 0.001). Of the 618 passengers interviewed, only 128 passengers (20.7%) thought that the air pollution was more severe in subway than outside; 449 passengers (72.7%) reported that they would use masks to protect them from air pollution, among which only 96 passengers (21.4%) would wear masks in subway cars in hazy days. There was difference in the proportion of passengers wearing masks among the passengers with different cognition of the air pollution in subway cars (P=0.008). Compared with those who thought the air pollution was more severe outside subway stations (136/340, 40.0%), the passengers who believed that the air pollution was more severe in subway cars had a much lower proportion of "never using masks in subway cars"(19/94, 20.2%).

    Conclusion The concentration of PM2.5 is generally higher in subway cars than in ambient environment during the evening rush hours in Beijing. However, most subway passengers show poor awareness of the fact and do not wear masks in subway cars. Therefore, their awareness of self-protection from air pollution in subway cars needs to be enhanced.

     

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