| 大气细颗粒物的透射电子显微镜研究 |
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| 引用本文： | 杨书申,邵龙义.大气细颗粒物的透射电子显微镜研究[J].环境科学学报,2007,27(2):185-189. |
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| 作者姓名： | 杨书申 邵龙义 |
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| 作者单位： | 1. 中国矿业大学(北京)煤炭资源与安全开采国家重点实验室及资源与地球科学系,北京,100083;中原工学院,郑州,450007
2. 中国矿业大学(北京)煤炭资源与安全开采国家重点实验室及资源与地球科学系,北京,100083 |
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| 基金项目： | 国家自然科学基金
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教育部跨世纪优秀人才培养计划 |
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| 摘 要： | 利用透射电子显微镜(TEM)对北京市区和背景点的细颗粒物(PM2.5)的形貌特征和集聚状态进行分析,结合颗粒物能谱(EDX)和选区电子衍射(SAED)特征,将北京市大气细颗粒物分为烟尘集合体、飞灰、矿物颗粒、硫酸盐和有机颗粒等5种单颗粒类型,并讨论了它们的来源.TEM分析表明,北京市区和背景点大气细颗粒物中不同类型的单颗粒所占比例不同,表明市区和背景点细颗粒物的污染物源有所不同.研究还表明,不同类型的细颗粒之间常常发生聚集.
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| 关 键 词： | 细颗粒物(PM2.5) 透射电子显微镜(TEM) 形貌类型 单颗粒分析 大气细颗粒物 透射 电子显微镜 研究 electron microscopy transmission fine particles atmospheric 聚集 发生 物源 污染 比例 单颗粒 颗粒类型 分析表 来源 有机颗粒 硫酸盐 矿物颗粒 |
| 文章编号： | 0253-2468(2007)02-0185-05 |
| 收稿时间： | 2006/2/20 0:00:00 |
| 修稿时间： | 02 20 2006 12:00AM |
The study of atmospheric fine particles by transmission electron microscopy |
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| YANG Shushen and SHAO Longyi.The study of atmospheric fine particles by transmission electron microscopy[J].Acta Scientiae Circumstantiae,2007,27(2):185-189. |
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| Authors: | YANG Shushen and SHAO Longyi |
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| Institution: | 1. State Key Laboratory of Coal Resources and the Safe Mining/Department of Resources and Earth Sciences, China University of Mining and Technology, Beijing 100083 ;2. Zhongyuan Institute of Technology, Zhengzhou 450007 |
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| Abstract: | This paper analyzed the morphological characteristics and aggregate state of the fine particles collected at the urban and background sites of Beijing by means of Transmission Electron Microscopy (TEM). Coupled with the characteristics from the energy dispersive X-ray spectrometry (EDX) and Selected Area Electron Diffraction (SAED) analyses, the typical fine particles in Beijing were classified into five categories of single particle types, including soot aggregates, fly ashes, mineral particles, sulfates and organic particles. The possible sources origins of these particles were discussed in more detail. The TEM analyses revealed that the relative proportions of these different types of particles at the urban site were different from those at the background site, indicating that the pollution sources of fine particles were different between the urban and background sites. The TEM images showed that these different types of particles tended to aggregate each other. |
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| Keywords: | fine particle (PM_(2 5)) transmission electron microscopy(TEM) morphological types individual particle analysis |
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