武汉东西湖区物流园柴油车NO_(x)和PM_(2.5)排放特征

NO_(x) and PM_(2.5) Emission Characteristics of Diesel Motor Vehicles in Wuhan Dongxihu Logistics Parks

为探究物流园货运柴油机动车的污染排放情况,文章选取武汉市东西湖区A、B和C3家物流园为研究对象,基于现场调查和武汉市机动车监管平台获取的数据进行了柴油机动车活动水平分析,并在物流园出入口断面开展NO_(x)与PM_(2.5)实地监测。结果显示,进出物流园的货车均以重型柴油车为主,占比超78.1%;其中,国Ⅴ+国Ⅵ排放标准类型的柴油机动车占比均超50%,并且仍有少量国Ⅲ标准的柴油机动车。研究表明,相关物流园柴油机动车活动水平与物流园占地面积无直接相关性,工作日与非工作日车流量变化与城市道路交通量呈现不同的变化趋势;3家物流园8月期间NO_(x)、PM_(2.5)、PM_(10)、CO和HC的排放总量分别为36.958、0.529、0.586、16.588和1.157 t;8月和11月进出物流园断面的NO_(2)和PM_(2.5)监测浓度,分别是相邻街道空气质量监测站的1.24~2.41倍和2.70~2.82倍,显示出物流园柴油机动车尾气排放对周边区域大气环境质量有明显影响,物流园柴油机动车结构类型同样关联到物流园的绿色转型。

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 NO_(x) and PM_(2.5) 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 NationalⅤ+NationalⅥemission 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 NO_(x),PM_(2.5),PM_(10),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 NO_(2) and PM_(2.5) 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.