乌鲁木齐市疫情期间交通流量对空气质量影响的分析

Analysis of the Impact of Traffic Flow on Air Quality During the Epidemic in Urumqi

选取环境空气中PM2.5、PM10、CO、NO_(2)、O_(3)污染物及空气质量指数(AQI)分析乌鲁木齐市疫情期间交通流量对空气质量的影响。结果表明,在乌鲁木齐市两次疫情交通管制期间,交通流量显著降低,环境空气中PM2.5、PM10、CO、NO_(2)、O_(3)污染物浓度及AQI随之降低,尤其是PM10、CO和NO_(2)浓度下降较为显著。自乌鲁木齐市解除交通管制,车辆恢复正常通行后,PM10、CO及NO2浓度逐渐增加甚至反超同期。鉴于PM、CO及NO_(2)是汽车尾气的主要污染物,因此可推测交通流量增加或降低,环境空气质量也会随之发生变化,尤其是空气中PM10、CO及NO_(2)污染物浓度呈正相关变化。

Select PM2.5,PM10,CO,NO_(2),O_(3) pollutants in ambient air and air quality index(AQI)to analyze the impact of traffic flow on air quality during the epidemic in Urumqi.The results showed that during the two epidemic traffic control periods in Urumqi,the traffic flow was significantly reduced,and the concentration of PM2.5,PM10,CO,NO_(2),O_(3) pollutants and AQI in the ambient air decreased accordingly,especially the concentration of PM10,CO,and NO2 decreased.More significant.Since Urumqi City lifted traffic control and vehicles resumed normal traffic,the concentrations of PM10,CO and NO_(2) have gradually increased and even exceeded the same period.Since PM,CO,and NO_(2) are the main pollutants of automobile exhaust,it can be inferred that the increase or decrease of traffic flow will also change the ambient air quality,especially the concentration of PM10,CO and NO_(2) pollutants in the air are positively correlated.