Journal of Shanghai University(Natural Science Edition) ›› 2015, Vol. 21 ›› Issue (1): 64-71.doi: 10.3969/j.issn.1007-2861.2014.04.001

• Metallurgical Materials • Previous Articles     Next Articles

Comparation of physicochemical characterization of PM2.5 collected at different heights in the air above campus

ZHANG Rong-chi, LONG Ling, LÜ Sen-lin, LIU Ding-yu, HAO Xiao-jie, ZHANG Wen-chao, LIU Pin-wei   

  1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
  • Received:2014-03-06 Online:2015-02-28 Published:2015-02-28

Abstract: PM2.5 has become a major air pollutant. Air quality in campus has close relationship with the health of young people. This study focuses on mass concentration and physicochemical characterization of PM2.5 collected at different heights above a campus. Ambient PM2.5 particles were sampled synchronously at two heights (5 m and 40 m). Microscopic character and its chemical composition of the fine particles were characterized using scanning electron microscope-energy dispersive spectrometer (SEM-EDS). The following results are obtained. Mineral particles, soot aggregates and fly ash are ubiquitous in the campus PM2.5, and gypsum particles, unknown particles can also be found. Mass and number concentrations at 5 m are higher than that of PM2.5 collected at 40 m. The numbers of mineral particles in PM2.5 collected at 5 m are more than that of fine particles sampled at 40 m. Soot aggregates in the PM2.5 at 40 m are more abundant than that at 5 m. Both the particle types and the number of mineral particles collected during daytime are less than that sampled at night.

Key words: different heights, fine particulate matter, physicochemical characterization, source apportionment

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