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Tests for Individual Sulfate-Containing Particles in Urban Atmosphere in Beijin


doi: 10.1007/BF02656983

  • Thin film methods and X ray energy dispersive technique were applied to analyze sulfate-containing particles in Beijing in order to examine their features and sources. Atmospheric aerosol particles were collected on electron mi-croscope meshes according to two size ranges: coarse particles (r>0.5μm) and fine particles (0.5μm≥r≥0.1μm) by using a two-stage impactor. It was found fiat more than seventy percent of the fine particles and about twenty percent of the coarse particles were sulfate-containing particles. These particles were formed mainly through heterogeneous nucleation. The element composition analyses revealed that the atmospheric aerosol particles in Beijing were domi-nated by crustal particles and construction dust.
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Manuscript History

Manuscript received: 10 July 1995
Manuscript revised: 10 July 1995
通讯作者: 陈斌, bchen63@163.com
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Tests for Individual Sulfate-Containing Particles in Urban Atmosphere in Beijin

  • 1. Center for Environmental Sciences of Peking University, Beijing 10087,Center for Environmental Sciences of Peking University, Beijing 10087,Geophysics Department of Peking University, Beijing 100871,Solar Terrestrial Environment Laboratory, Nagoya University, Toyokawa 442, Japan,Electron Microscope Laboratory of Peking University, Beijing 100871

Abstract: Thin film methods and X ray energy dispersive technique were applied to analyze sulfate-containing particles in Beijing in order to examine their features and sources. Atmospheric aerosol particles were collected on electron mi-croscope meshes according to two size ranges: coarse particles (r>0.5μm) and fine particles (0.5μm≥r≥0.1μm) by using a two-stage impactor. It was found fiat more than seventy percent of the fine particles and about twenty percent of the coarse particles were sulfate-containing particles. These particles were formed mainly through heterogeneous nucleation. The element composition analyses revealed that the atmospheric aerosol particles in Beijing were domi-nated by crustal particles and construction dust.

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