安阳市2017年大气PM_(2.5)污染成因分析

Analysis on the Causes of Atmospheric PM_(2.5) Pollution in Anyang City in 2017

选取安阳市4个不同功能定位的采样点,采用重量法仪器,采集了安阳市春、夏、秋、冬4个季节的PM_(2.5)的季节变化和空间分布规律,并对其成因及污染物来源进行了初步分析。结果表明:安阳市大气颗粒物主要来自于6个因子:燃煤、工业过程、机动车、扬尘、生物质燃烧以及其他来源。安阳市PM_(2.5)春夏秋季主要以工业过程源为主,冬季以燃煤源为主。扬尘源春季贡献最大为11.4%;机动车源夏季贡献最高为21.2%;生物质燃烧源秋冬季贡献较大。冬季燃煤源成为最主要贡献源,工业过程源贡献占比最小,但是绝对贡献没有减弱。

Four sampling points with different function orientation in Anyang City were selected to collect the seasonal variation and spatial distribution of PM_(2.5) in spring,summer,autumn and winter of Anyang City by using the weight method instrument,and their causes and pollutant sources were preliminarily analyzed.The results show that there are six main sources of atmospheric particulates in Anyang City:coal combustion,industrial process,motor vehicles,dust,biomass combustion and other sources.PM_(2.5) in Anyang City is mainly from industrial process pollution in spring,summer and autumn,and coal in winter.The contribution of dust sources is 11.4% in spring,21.2% in summer,and the contribution of biomass combustion sources is greater in autumn and winter.In winter,coal-fired sources become the most important contribution source,and industrial process sources account for the smallest proportion,but the absolute contribution is not weakened.