NOx and PM2.5 Emission Characteristics of Diesel Motor Vehicles in Wuhan Dongxihu Logistics Parks
In order to investigate the pollution emission of freight diesel motor vehicles in logistics parks,the article selected three logistics parks A,B and C in Dongxihu District of Wuhan City as the research object,analyzed the activity level of diesel motor vehicles based on the on-site survey and the data obtained from Wuhan Motor Vehicle Supervisory Platform,and carried out the field monitoring of NOx and PM2.5 in the entrance and exit sections of the logistics parks.The results show that the trucks entering and leaving the logistics park are mainly heavy-duty diesel vehicles,accounting for over 78.1％;the proportion of diesel motor vehicles of National Ⅴ+National Ⅵ emission standard types is more than 50％,but there are still a small number of diesel motor vehicles of National Ⅲ standard.The activity level of diesel motor vehicles in each logistics park has no direct correlation with the area of the logistics park,and the changes in traffic flow on weekdays and non-weekdays show different trends from the traffic volume on urban roads.The total emissions of NOx,PM2.5,PM10,CO,and HC from the three logistics parks during August were 36.958 tons,0.529 tons,0.586 tons,16.588 tons,and 1.157 tons,respectively,and the monitored concentrations of NO2 and PM2.5 at the cross-sections into and out of the logistics parks in August and November were 1.24～2.41 times higher than those of the neighboring street air-quality monitoring stations,and 2.70～2.82 times higher than that of the neighboring street air-quality monitoring stations,respectively,which shows that diesel motor vehicle exhaust emissions from the Logistics Park have a considerable impact on the quality of the air environ-ment in the neighboring areas,and the type of diesel motor vehicle structure in the Logistics Park is also associated with the green transformation.
logistics parkdiesel motor vehiclesactivity levelNOxPM2.5
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