Asian Journal of Atmospheric Environment

Korean Society for Atmospheric Environment (한국대기환경학회)
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Concentration Variations in Primary and Secondary Particulate Matter near a Major Road in Korea

  • Ghim, Young Sung (Department of Environmental Science, Hankuk University of Foreign Studies) ;
  • Won, Soo Ran (Indoor Environment & Noise Research Division, National Institute of Environmental Research) ;
  • Choi, Yongjoo (Department of Environmental Science, Hankuk University of Foreign Studies) ;
  • Chang, Young-Soo (Environmental Science Division, Argonne National Laboratory) ;
  • Jin, Hyoun Cher (Center for Environment, Health and Welfare Research, Korea Institute of Science and Technology) ;
  • Kim, Yong Pyo (Department of Environmental Science and Engineering, Ewha Womans University) ;
  • Kang, Chang-Hee (Department of Chemistry, Jeju National University)
  • Received : 2015.12.17
  • Accepted : 2016.02.26
  • Published : 2016.03.31
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Abstract

Particle-phase concentrations were measured at 10, 80, and 200 m from the roadside of a national highway near Seoul in January and May 2008. The highway has two lanes each way, with an average hourly traffic volume of 1,070 vehicles. In January 2008, $PM_{10}$ concentrations decreased from 10 to 80 m but increased at 200 m. Black carbon (BC) decreased only slightly with distance due to the influence of biomass burning and open burning from the surrounding areas. In May 2008, the effect of secondary formation on both $PM_{10}$ and $PM_{2.5}$ was significant due to high temperatures compared with January. Because on-road emissions had little effect on secondary formation for a short time, variations in $PM_{10}$ concentrations became smaller, and $PM_{2.5}$ concentrations increased with distance. The effects of fugitive dust on PM concentrations were greater in May than in January when the mean temperature was below freezing. In the composition variations, the amounts of primary ions, organic carbon (OC), and BC were larger in January, while those of secondary ions and others were larger in $PM_{10}$, as well as $PM_{2.5}$ in May.

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References

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