将高灵敏度的同步辐射微束x射线荧光光谱分析方法与计算机模式识别技术相结合,用于上海市大气PM2.5,单颗粒物的源识别。分析了污染排放源的PM2.5,单颗粒物,结果表明,来自不同污染排放源的颗粒物具有不同的能谱特征。同时分析了环境空气监测样品PM2.5,单颗粒物,结果表明,在上海市中心区大气PM2.5,的污染源主要以机动车尾气为主,而在吴淞工业区大气PM2.5,的污染源主要以钢铁工业尘和燃煤烟尘为主。
Synchrotron radiation micro-beam X-ray pattern recognition technique was applied to identify fluorescence (micro-SXRF) spectrometry combining with sources of individual PM2.5 airborne particles in ambient air of Shanghai City. The PM2.5 airborne particles of different emission sources in Shanghai City were determined. The results show that each emission source has its characteristic micro-SXRF spectrum. Meanwhile, the PMa.5 airborne particles in environmental monitoring samples were determined. It was found that the major emission sources of the PM2.5 airborne particles were from vehicle tail exhausts in the central city and from metallurgic industrial dust and coal combustion dust in Wu-song industry district.