北京市大气细颗粒物PM_(2.5)的来源研究  

Source Identification of Ambient PM_(2.5) in Beijing

作　　者：朱先磊[1] 张远航[1] 曾立民[1] 王玮[2] 

机构地区：[1]北京大学环境学院,北京100871 [2]中国环境科学研究院,北京100012

出　　处：《环境科学研究》2005年第5期1-5,共5页Research of Environmental Sciences

基　　金：国家高技术研究发展计划项目(2003AA641040)

摘　　要：2000—2001年在北京联合大学化学学院、中国预防科学研究院和中国环境科学研究院3个采样点采集北京市PM2.5样品,并对其中无机元素、阴阳离子、有机碳(OC)、元素碳(EC)和有机物进行测定。以多环芳烃和部分无机组分为示踪物,利用CMB受体模型对PM2.5来源进行解析。结果表明,北京市PM2.5的主要来源为燃煤、扬尘、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。污染源贡献率随地域变化不大,燃煤、扬尘、生物质燃烧、二次硫酸盐和硝酸盐随季节变化比较明显。与1989—1990年解析结果相比,10年间PM2.5来源发生了一定变化。PM2.5 samples were collected at Lianda, Yufangyuan and Huankeyuan in Beijing during 2000-2001, and elements, ions, OC/EC, and organic compounds were determined. A chemical mass balance （CMB） receptor model using PAHs and some inorganic compounds as tracers was applied in this study to apportion source contributions to ambient PM2.5 in Beijing. The results showed that the major sources of PM2.5 in Beijing were coal burning, dust, vehicle exhaust, construction dust, biomass burning, secondary sulfate and nitrate, and organic matter. The variation of source contributions was not significant among the sampling sites, but distinct seasonality was observed for the sources of coal combustion, dust, biomass burning, and secondary sulfate and nitrate. A comparison with the results obtained in 1989-1990 indicated that source contributions to PM2.5 were changing during the decade.

关 键 词：PM2.5 源解析 CMB受体模型 多环芳烃 

分 类 号：X513[环境科学与工程—环境工程]