【作者】 张帆； 成海容； 王祖武； 吕效谱；

【Author】 ZHANG Fan;CHENG Hai-rong;WANG Zu-wu;LV Xiao-pu;School of Resource and Environmental Science,Wuhan University;

【机构】 武汉大学资源与环境科学学院；

【摘要】 分析了武汉地区武大和东新两个采样点秋季灰霾和非灰霾天气PM2.5中的九种水溶性离子(F、Cl-、NO3-、SO42-、Na+、NH4+、K+、Mg2+、Ca2+)浓度。结果表明,NO3-、SO42-和NH4+是武汉秋季PM2.5中最重要的三种水溶性离子,且PM2.5中各水溶性离子之间组成比例是相对稳定的。灰霾期PM2.5中水溶性离子比重的增加是武汉秋季灰霾污染的重要特征,它们可能来源于生物质燃烧、土壤扬尘、化石燃料燃烧、汽车尾气排放等过程,其中东新站点的大气二次污染比武大站点严重。固定源对武汉两站点秋季灰霾期大气中NO X与SO2相对贡献均比非灰霾期要大,移动源对东新站点秋季大气中NO X与SO2的相对贡献则比武大站点要大。更多还原

【Abstract】 Nine water-soluble ions of PM2.5 including F, Cl-, NO3-, SO42-, Na+, NH4+, K+, Mg2+and Ca2+ were analyzed during haze and non-haze period in autumn in 2012 at Wuda and Dongxin in Wuhan. The results showed that NO3-, SO42- and NH4+ were the most important ions in PM2.5 and the composition of the ions in PM2.5 was relatively stable. The increase of the proportion of water-soluble ions in PM2.5 during the haze period was an important feature of the air pollution in autumn in Wuhan. And they might be derived from the course of biomass burning, soil dust, combustion of fossil fuels, automobile exhaust emissions. The secondary air pollution in Dongxin was more serious than that in Wuda. The relative contribution of stationary sources to NO x and SO2 in Wuhan’s atmosphere during the haze period was greater than that in the non-haze period. And the relative contribution of mobile sources to NO x and SO2 in Dongxin was greater than that in Wuda.更多还原