【摘要】 目的了解北京市公共交通工具微环境空气质量。方法于2004年7月—2006年8月选取北京市城铁(15个车次)、地铁(8个车次)、出租车(36个车次)、公共汽车(46个车次)中具有代表性的车辆进行了车厢空气中一氧化碳、二氧化碳、颗粒物、苯系物浓度的监测并采用空气质量指数法对交通工具微环境内的空气质量进行评价。结果公共交通工具车厢内二氧化碳的污染较为严重,超标率达到37%以上,其中在出租车中的污染最为严重,超标率达到92%。除城铁外,其他交通内PM10污染也相当严重,超标率达到30%以上。其中在公共汽车中污染异常严重,超标率达到84%。一氧化碳在道路交通系统(公共汽车和出租车)中污染较严重,超标率在10%以上。城铁内空气质量最好,评为Ⅱ级,CO2是其首要污染物;非空调公共汽车在开窗情况下的车内空气质量最差,评为Ⅴ级,PM10为其首要污染物。结论在北京市公共交通系统中,城铁的车内空气质量最好,其次为地铁、出租车,公共汽车内的空气质量最差。更多还原

【Abstract】 Objective To get knowledge of the air quality in public transportation vehicles in Beijing. Methods The concentration of carbon monoxide,carbon dioxide,particle matter and benzene were measured in the carriages of buses,taxis,subways and railways in Beijing from July 2004 to August 2006. The air quality assessment was conducted in different public transportation vehicles. Results The carbon dioxide concentrations were high in transportation vehicles in Beijing and the exceeding rates were above 37%. The PM10 concentrations were high in buses,taxis and subways,and the exceeding rates were above 30%. The carbon monoxide concentrations were high in buses and taxis,and the exceeding rates were above 10%. Conclusion In Beijing,railway carriages have the best air quality,following by subway and taxis carriages. Buses carriages have the worst air quality.更多还原