2011～2012年期间，选择了春、夏、秋、冬4季，在南京市主城区进行PM2.5采样，分析了大气颗粒物的质量浓度、元素组成、离子、有机碳(OC)和元素碳(EC)的浓度。根据监测结果采用因子分析与受体模型对其来源进行解析，结果显示：南京市大气PM2.5的主要来源为工业排放、机动车尾气、二次污染和扬尘，约占PM2.5颗粒物组分的60%左右，其中用因子分析模型判断工业排放、机动车尾气、土壤扬尘因子贡献率占32.5％，二次粒子尘占11.7％，燃煤与建筑水泥尘占16.1%；受体模型结果与因子分析结果基本一致。根据解析结果与实际污染特征，针对性地提出污染源控制对策。%From 2011 to 2012, during four seasons of spring, summer, autumn, winter, we separately took PM2.5 samples in downtown areas of Nanjing, and analyzed the mass concentration of atmospheric inhalable particles, elemental composition, ions as well as the concentration of OC and EC. On the base of monitoring results, we adopted factor analysis and receptor model to analyze its cause. These results show: the main causes of atmospheric particulate matter PM2.5 in Nanjing include industrial discharge, vehicle exhaust, secondary pollution and soil dust. The measure-result from factor analysis model indicates that the contribution rate of dust factor, vehicle exhaust and industrial discharge is 32.5%, moreover, the contribution rate of dust particles from secondary pollution is 11.7% along with the contribution rate of cement dust from construction site is 4.4% ; the analytical result of receptor model is basically consistent with the analytical result of factor analysis. According to the analytical results and features of actual pollution, we pertinently put forward concrete countermeasures to control all the pollutant sources.
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