Coarse aerosol particle size and shape characteristics near ground level of Shijiazhuang city, China
This research sampled subaerial ambient coarse aerosol particles (＞2μm of equivalent area diameter) in the typical air polluted city of Shijiazhuang to measure the particle size distribution and shape characteristics by the analyzer of CIS-50 and the scan electronic microscope of S-570 in the non-heating period and heating period respectively. The results show that the coarse aerosol particle size distribution mode is 2～4μm in the non-heating period and 3-5μm in the heating period, with the size range of 0.8～120μm, mostly under 10μm; and the square or square like particle shape is dominant, the sphere like lesser, the acute-angle and lathy shape sparse. There exist particle size distribution and shape characteristics differences in the non-heating period and heating period influenced greatly by the ground coal combustion emission and windblown dust In the heating period, particle size average increases by 53.2％, principally in the size range of 5～10μm, and 20～50μm secondly. Meanwhile, the particle number of quasi-round & round shape group and those with convex-concave fractal edge increase obviously. These quasi-round particles are agglomerate derived from combustion in the SEM images. The relationship between particle size and shape is demonstrated by that the percentage of PM5 and the particle number of the quasi-square & square shape group are positively correlative with r of 0.9458; quasi-round & round shape group negatively correlative with r of -0.9726 respectively.
Size distribution Shape characteristics Coarse aerosol particles Shijiazhuang
Zanhong Wang Litao Wei Wenzong Zhang Yuiiang Zhang Zhou zhao Sumin Zhang
College of Resource and Environment Sciences, Hebei Normal University, 113 East Yuhua Road, Shijiazh Hebei Meteorological Science Institute, 178 Tiyu Avenue, Shijiazhuang, 050021, China
国际会议
天津
英文
80-87
2007-07-17（万方平台首次上网日期，不代表论文的发表时间）