宿迁市主城区大气PM_(2.5)来源解析

Source analysis of atmospheric PM_(2.5) in the main city of Suqian city

为探讨宿迁市主城区大气PM2.5的主要来源,于2015年11月-2016年8月在城区3个环境监测点同步采集PM2.5环境受体样品,分析了无机元素、水溶性离子、有机碳和元素碳含量及其分布特征。采集了建筑水泥尘、道路扬尘、煤烟尘、土壤尘和城市扬尘等污染源类,建立了宿迁市本地化污染源成分谱库。利用CMB(化学质量平衡)受体模型进行了初步源解析,并利用基于排放清单的二次源解析技术开展了综合源解析。根据初步源解析结果,宿迁主城区大气PM2.5主要来源于二次粒子和煤烟尘,贡献率分别为35.1%和25.1%。综合源解析结果显示,燃煤源、工业生产、移动源、扬尘和其他源类对主城区大气PM2.5的贡献分别为29%、20%、20%、18%和13%。

In order to explore the main sources of atmospheric PM2.5 in the main urban area of Suqian City, PM2.5 environmental receptor samples were collected simultaneously from three environmental monitoring points in the urban area from November 2015 to August 2016, and the inorganic elements and water-soluble materials were analyzed. Ion, organic carbon and elemental carbon content and their distribution characteristics. The pollution sources such as construction cement dust, road dust, coal dust, soil dust and urban dust were collected, and the localized pollution source component library of Suqian City was established. The preliminary source analysis was carried out using the CMB（Chemical Mass Balance） receptor model, and the integrated source analysis was carried out using the secondary source analysis technique based on the emission inventory. According to the preliminary source analysis results, atmospheric PM2.5 in Suqian main city mainly comes from secondary particles and coal soot, and the contribution rates are 35.1% and 25.1%, respectively. The comprehensive source analysis results show that the contribution of coal source, industrial production, mobile source, dust and other sources to atmospheric PM2.5 in the main urban area is 29%, 20%, 20%, 18% and 13%, respectively.