重度污染天气下大气颗粒物PM_(1.0)物理化学特征的透射电子显微镜研究  

The study on physicochemical characteristics of aerosol particles PM_(1.0) in the heavily polluted weather by TEM instrumentation

作　　者：于建勇[1] 周蕊[2,3] 于冰[2] 王帅[2,4] 肖昕[4] 

机构地区：[1]中国矿业大学理学院,江苏徐州221116 [2]中国矿业大学现代分析与计算中心,江苏徐州221116 [3]中国矿业大学化工学院,江苏徐州221116 [4]中国矿业大学环测学院,江苏徐州221116

出　　处：《电子显微学报》2014年第5期429-435,共7页Journal of Chinese Electron Microscopy Society

基　　金：国家自然科学基金资助项目(No.51274196)

摘　　要：大气颗粒物样品采自徐州市区2013年12月～ 2014年1月间重度污染天气.采样期间PM1.0主要由烟尘颗粒、复合酸冷凝颗粒、硫酸盐颗粒、矿物颗粒、金属及金属氧化物颗粒等组成.本文通过透射电子显微镜（TEM）及能谱仪（EDS）给出的大气颗粒物PM1.0高分辨结构信息、颗粒相尺寸及化学相尺寸信息、颗粒相中不同化学相嵌布特征信息等,对组成颗粒相的化学相连生关系进行了比较系统的分析研究.分析数据表明,大气颗粒物PM1.0的颗粒模态转变过程与颗粒物形成过程的相关性较强.异相凝结颗粒中化学相物质结构类型的判别是识别颗粒成因及形成过程的重要因素.The aerosol particles were collected in XuZhou city from December of 2013 to January of 2014 under the condition of heavily polluted weather. The main compositions of PM1.0 particles were soot, compound acid condensing particles, sulfates, mineral grains, metals, metal oxide particles and so on. In this paper, the information of the high resolution structure, particle size, chemical phase scale, chemical element dissemination and intergrown property of PM1.0 aerosol particles was studied systematically by the transmission electron microscopy（TEM） coupled with X-ray spectroscopy （EDS）. The TEM data shows that the transformation process of aerosol submicron particles PM1.0 is closely related to the particle formation process. Aggregated particles in heterogeneous phase chemical structure of matter is an important factor influencing the type of particles and identify the causes of the formation process.

关 键 词：PM1.0 透射电子显微镜 物理化学特征 颗粒模态 化学相组构 

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]