利用场发射扫描电镜对北京市大气可吸入颗粒物的研究  

Field Emission Scanning Electron Microscope Study of Inhalable Particles in Beijing Ambient Air

作　　者：时宗波[1] 邵友义 贺桃娥[1] 吕森林[1] 

机构地区：[1]中国矿业大学北京校区,北京100083

出　　处：《北京工业职业技术学院学报》2003年第2期31-34,共4页Journal of Beijing Polytechnic College

基　　金：教育部博士点基金及国家自然科学基金(40275040)

摘　　要：本文主要利用高分辨率场发射扫描电镜(FESEM)对北京市大气可吸入颗粒物样品进行微区形貌和成分分析,区分出三种不同形态的烟尘集合体:链状、蓬松丛状和密实块状。链状烟尘和蓬松团块状烟尘既可能来自机动车尾气,也可能来自燃煤,而密实块状烟尘可能来自煤的燃烧。通过X射线能谱(EDX)分析,北京大气PM10中主要矿物类型包括硅铝酸盐、石英、石膏、白云石以及部分由两种矿物组成的沙尘等。Field Emission Scanning Electron Microscope(FESEM)is used to analyze the morphology and chemical composition of individual particles in Beijing ambient air. Soot aggregates are mainly classified as: chain - like, 'fluffy'cluster and dense packed massive. The chain - like and 'fluffy'cluster soot aggregates are possibly from diesel exhaust particles and coal burning, whereas the densely packed massive soot aggregates are possibly from coal burning. X - ray energy dispersive spectrometer (EDX) analysis shows that minerals in Beijing PMioinclude aluminosilicate,quartz, gypsum and dolomite and so on. Some mineral particles are composed of two or more types of minerals.

关 键 词：场发射扫描电镜(FESEM) X射线能谱(EDX) 可吸入颗粒物 北京 

分 类 号：X831[环境科学与工程—环境工程]