Characterization of Dust and Non-dust Aerosols with SEM/EDX  

作　　者：QI Jianhua LI Xianguo FENG Lijuan ZHANG Manping 

机构地区：[1]College of Environmental Science and Engineering, Ocean University of China, Qingdao 266003, P. R. China [2]College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266003, P.R. China

出　　处：《Journal of Ocean University of China》2006年第1期85-90,共6页中国海洋大学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.49976020).

摘　　要：Total suspended particulate （TSP） samples were collected at three sites along the coast of Qingdao, China, before and during a major dust storm in March, 2002. For comparison, PM10（particulate matter with aerodynamic diameters less than 10μm） samples were collected at one of the three sites. The morphological observation and compositional analysis of bulk and individual particles were performed by using scanning electron microscopy equipped with an energy dispersive X-ray system （SEM/EDX） for the TSP and PM10 samples. The results showed that the particles of different kinds of morphology had different elemental compositions, but the particles of similar morphology did not always have the same elemental composition for non-dust samples. The morphology and composition of non-dust particles were different at different sites. The fractal and spherical particles existed mainly in the coarse fraction for non-dust samples, while in the fine mode （〈 10μm） there were floccules formed by fine particles flocking together and containing crustal elements. Compared with the non-dust particles, the dust particles were more homogeneous in terms of morphology, particle size and composition. Particles with irregular shapes and well-distributed sizes dominated in the dust samples, containing crustal elements such as Mg, A1, Si, Ca, Fe, etc. The high sulfur content indicated that homogeneous and heterogeneous reactions took place on the surfaces of the dust particles in the specific environment of Qingdao.全部的推迟的微粒(TSP ) 样品沿着 Qingdao 的海岸在三个地点被收集，中国，在前并且在在 2002 年 3 月的主要尘暴期间。为比较， PM_(10 )( 有空气动力学的直径的微粒物质不到 10 μ m ) 样品被收集三个地点赎回。词法观察和体积和单个粒子的组合分析被使用扫描与为 TSP 和 PM_(10 ) 的散 X 光检查系统(SEM/EDX ) 取样的一个精力装备的电子显微镜学执行。结果证明形态学的不同类型的粒子有类似的形态学的不同元素的作文，而是粒子总是没为非灰尘样品有一样的元素的作文。非灰尘粒子的 Themorphology 和作文在不同地点是不同的。分数维、球形的粒子为非灰尘样品主要在粗粒级存在，当时在好模式(< 10 μ m ) 有絮状物，一起结队并且包含外壳的元素的好粒子形成。与非灰尘粒子相比，尘粒以形态学，颗粒大小和作文是更同类的。有 andwell 分布式的尺寸在灰尘样品统治了的不规则的形状的粒子，包含象 Mg 那样的外壳的元素，艾尔， Si， Ca， Fe，等等。高硫内容显示了那同类并且多相反应在 Qingdao 的特定的环境发生在尘粒的表面上。

关 键 词：AEROSOL individual particle scanning electron microscopy 

分 类 号：X513[环境科学与工程—环境工程]