徐州市新城区环境空气质量现状分析

Analysis of Ambient Air Quality in New Urban District of Xuzhou

按照HJ 663—013《环境空气质量评价技术规范(试行)》对徐州市新城区站点进行评价。对新城区站点空气质量达标率利用监测数据进行分析,结果表明,观测期间该站点空气质量优良率低于全市水平。对2019年颗粒物PM2.5源解析,机动车源和二次源贡献率比较高,季节性变化明显,夏季机动车源占比较高;进入采暖期,燃煤源显著加。利用污染物风速污染分布图得出新城区站点受偏南风影响为主,受偏东南、西南方向上的道路交通、工地扬尘、以及城中村污染源影响较大。

According to the"Technical Specifications for Ambient Air Quality Evaluation(Trial)"(HJ 663—2013),the new urban district station in Xuzhou was evaluated.The air quality standard rate of new urban district station is analyzed by using the monitoring data.The results show that the air quality excellent rate of the station is lower than that of the whole city during the observation period.PM2.5 source apportionment in 2019 showed that motor vehicle sources and secondary sources have a high contribution rate,seasonal changes are obvious,and motor vehicle sources account for a high proportion in summer.In the heating period,coal combustion sources have increased significantly.Based on the distribution map of wind pollution,it is concluded that the stations in the Xincheng District are mainly affected by southerly winds,and are greatly affected by road traffic in the southeast and southwest directions,construction site dust,and urban village pollution sources.