二次雾霾气溶胶颗粒的扫描电子显微学分析  

Scanning electron microscopy analysis of secondary aerosol particles

作　　者：白章鹏 皮义群 王丽[1] 张隐奇[1] 吉元[1] 严铮洸[1] 韩晓东[1] BAI Zhang-peng;PI Yi-qun;WANG Li;ZHANG Yin-qi;JI Yuan;YAN Zheng-guang;HAN Xiao-dong(Institute of Microstructure and Properties of Advanced Materials Beijing University of Technology Beijing 100124 ,China;Beijing Key Laboratory, Beijing 100124 ,China)

机构地区：[1]北京工业大学固体微结构与性能研究所北京市重点实验室,北京100124

出　　处：《电子显微学报》2017年第5期466-470,共5页Journal of Chinese Electron Microscopy Society

基　　金：国家自然科学基金资助项目(Nos.21201014;11674015;1L102001201401;11102001201601);北京市自然科学基金资助项目(No.2172005)

摘　　要：北京地区的雾霾是全国,也是世界都在关注的问题。作者利用高分辨环境扫描电镜结合能谱仪,分析了雾霾气溶胶颗粒中的硫酸盐和硝酸盐等典型二次反应颗粒的形貌特征、化学成分、可能的物相及它们的混合态。结果表明:二次颗粒的尺寸为数纳米至数微米。它们呈多种形态,包括梭形、条状、球形、柱状、针状、片层状等。几种二次颗粒之间,以及二次颗粒与天然矿物尘及其它人为来源的飞灰和金属基颗粒等经常形成颗粒间粘附的混合颗粒团聚体。The haze pollution of Beijing has attracted urgent domestic and overseas concerns.The morphology and chemical composition of aerosol particles produced by secondary reactions,such as sulfates and nitrates,as well as their possible phases and mixing state have been analyzed by high resolution environmental scanning electron microscopy combined with X-ray energy dispersive spectroscopy.The results show that the size of the typical secondary particles covers the range from tens of nanometers to several microns.They exhibit variations in morphology,including spindle,strip,sphere,column,needle,lamellar,and so on.The secondary particles are often mixed with natural mineral dusts and other anthropogenic particles,like fly ash and metal-based particles,as well as other secondary particles.

关 键 词：雾霾 扫描电镜 二次颗粒物 硫酸盐 硝酸盐 

分 类 号：X513[环境科学与工程—环境工程] TG115.215.3[金属学及工艺—物理冶金]