老旧小区大气污染特征分析OACHSSCD

According to the Environmental Air Quality Standard(GB 3095-2012),there are six basic items of environmental air pollutants,namely fine particulate matter(PM2.5),inhalable particulate matter(PM10),CO,SO2,O3,and NO2.In order to understand the spatiotemporal distribution characteristics of air pollutants in old residential areas,Changfeng Dongyuan residential area in Anning district,Lanzhou city is taken as the research area to monitor six types of air pollutants and analyze the characteristics and influencing factors of air pollution.The results indicate that the pollutant concentration at the intersection of the main road in the community is higher than that on the main road.In the atmosphere of old residential areas,high concentrations of PM2.5,PM10,and CO are concentrated in 08:00-09:00.PM2.5,PM10,CO,SO2,and NO2 are greatly affected by traffic flow;O3 concentration shows a strong correlation with temperature;PM2.5,PM10,CO,SO2,and NO2 concentrations are negatively correlated with wind speed,while O3 concentration is positively correlated with wind speed.