华北地区PM2.5的污染特征及来源分析

Pollution characteristics & Source Identification of Ambient PM2.5 in North China

PM2.5为大气中的细粒子,是空气中空气动力学直径小于等于2.5μm的悬浮颗粒物。华北地区PM2.5的污染特征主要受SO2,NOX的影响,其主要来源为扬尘、燃煤、机动车排放、建筑尘、生物质燃烧、二次硫酸盐和硝酸盐及有机物。污染源随地域变化不大,扬尘、燃煤、生物质燃烧、二次硫酸盐和硝酸盐随季节变化比较明显。

PM2.5 is also called the fine particles in the atmosphere, air dynamics in the air suspended particulate diameter less than 2.5 lam.PM2.5 in North China are mainly controlled by SO2, the influence of NOX, its main source for dust, coal, motor vehicle emissions, construction dust, biomass burning, two times of sulfate and nitrate and organic matter. Little change in pollution source with regional, dust, coal, biomass burning, two times of sulfate and nitrate changes with the seasons obviously.