Journal of Korean Society for Atmospheric Environment

한국대기환경학회 (Korean Society for Atmospheric Environment)
권호 표지

Chemical Composition of the Size-resolved Particles in Buk-Ak Tunnel

  • Ma, Chang-Jin (Department of Socio-Environmental Energy Science, Graduate School of Energy Science, Kyoto University) ;
  • Hwang, Kyung-Chul (Department of Environmental Science, Dong-Nam Health College) ;
  • Kang, Gong-Unn (Department of Environmental Science, WonKwang Health Science College) ;
  • Tohno, Susumu (Department of Socio-Environmental Energy Science, Graduate School of Energy Science, Kyoto University)
  • 발행 : 2004.06.01
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초록

The roadway tunnels in urban areas give rise to problems such as a localized air pollution. Here, we report the results of a case study of an urban roadway tunnel measurement. The size-resolved particle sampling was carried out with a two 2-stage filter pack samplers and an Andersen impactor sampler at the center of Buk-Ak tunnel in November 2001. Particle Induced X-ray Emission (PIXE) was applied to determine the elemental composition of size-resolved particles divided into soluble and insoluble fractions. The Thermal/Optical Reflectance (TOR$^{(R)}$) method was also employed in analyzing of elemental carbon (EC) and organic carbon (OC). Mass concentrations of fine (< 1.2 ${\mu}{\textrm}{m}$) and coarse (> 1.2 ${\mu}{\textrm}{m}$) particles are 165 and 48 $\mu\textrm{g}$ m$^{-3}$ , respectively. Total elemental mass concentration (the sum of insoluble coarse, soluble coarse, insoluble fine, and soluble fine) is found to be 24$\mu\textrm{g}$ m$^{-3}$ and comprises only 11 % of total particle mass concentration. The concentrations of EC, OC, and mass show the clear dependency on particle size with the maximum between 0.1 and 0.43 ${\mu}{\textrm}{m}$ aerodynamic diameters. Total carbon (sum of EC and OC) accounts for approximately 70% of mass concentration.n.

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