Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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Characterization of Aerosols Collected at a Subway Station Platform Using Low-Z Particle Electron Probe X-ray Microanalysis

Low-Z particle EPMA 단일입자 분석법을 이용한 지하철 승강장에서 미세입자 특성 분석

  • Hwang HeeJin (Department of Chemistry, Inha University) ;
  • Oh MiJung (Department of Chemistry, Inha University) ;
  • Kang Sun-ei (Department of Chemistry, Inha University) ;
  • Kim HyeKyeong (Institute for Basic Science, Inha University) ;
  • Ro Chul-Un (Department of Chemistry, Inha University)
  • Published : 2005.12.01
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Abstract

A single particle analytical technique, named low-Z particle electron probe X-ray microanalysis (EPMA), was applied to characterize samples collected at a subway station and ambient samples in Seoul. According to their chemical composition, many distinctive particle types were identified. For samples collected at the subway station platform, the major chemical species are carbon-rich, organic, aluminosilicates (AlSi), AlSi/C, AlSi/$CaCO_{3},\;CaCO_{3},\;SiO_{2},\;and\;Fe_{2}O_{3}$. For outdoor samples, carbon-rich, organic, AlSi, $CaCO_{3},\;SiO_{2},\;NaNO_{3},\;(Na,Mg)NO_{3},\;Na(CO_{3},NO_{3},SO_{4}),\;and\;(NH_{4})_2SO_4$, are abundantly encountered. Samples collected at the subway station show very high contents of $Fe_{2}O_{3}$, both in coarse and fine fractions, which come from brake block, subway train wheel, electric contact materials, etc. It is demonstrated that the single-particle characterization using this low-Z particle EPMA technique provided detailed information on various types of chemical species in indoor and outdoor samples.

Keywords

References

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