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《Environmental Science》 2007-01
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Morphology and Size Distribution of Inhalable Particulates in Shanghai During Winter

YANG Shu-shen~(1,2),SHAO Long-yi~1,LI Wei-jun~1,ZHANG Gui-lin~3,TAN Ming-guang~3(1.State Key Laboratory of Coal Resources and Safe Mining and the Department of Resources and Earth Sciences,China University of Mining and Technology,Beijing 100083,China;2.Department of Civil and Architectural Engineering,Zhongyuan Institute of Technology,Zhengzhou 450007,China;3.Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China)  
High resolution field emission scanning electron microcopy(FESEM) and image analysis(IA) were used to study individual particle morphology,and the number-size and volume-size distributions of the PM_(10) collected in Shanghai during winter(January 2005).The results showed that the mineral particles and soot aggregates were ubiquitous in PM_(10) of Shanghai,and some residual droplets of fuel oil were also seen.The mineral particles included irregular,circular and regular morphological types.The soot aggregates had chain and fluffy types.The mineral particles accounted for 75% and 64% by number and by volume,while the soot aggregates only took 25% and 36%,respectively.The high proportion of mineral particles implied that serious blown dust influenced the Shanghai air in winter.The fine particles were prevailing in the Shanghai PM_(10).There were distinct temporal variations in the number-size distribution and volume-size distribution.The number-size distribution of the mineral particles and soot aggregates of the daytime PM_(10) had peaks at 0.1~0.3 μm and 0.2~0.3 μm,respectively,while,the number-size distributions of two types of particles in the nighttime showed peaks at 0.3~0.5 μm and 0.4~0.6 μm,respectively.This demonstrated that the particles in the nighttime were bigger than those in the daytime.
【Fund】: 国家自然科学基金项目(40575065);; 教育部新世纪优秀人才支持计划项目;; 中国科学院核分析技术联合开放实验室(上海分部)基金;; 中国矿业大学(北京)“211”工程项目
【CateGory Index】: X513
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