Particle and aerosol research (한국입자에어로졸학회지)

Korean Association for Particle and Aerosol Research (한국입자에어로졸학회)
권호 표지

Characteristics of spatial distribution of ultrafine particle number concentration on the roads of Nowon-gu, Seoul

서울시 노원구 도로상 극미세입자 오염도 공간분포 특징

  • Lee, Seung-Bok (Global Environment Center, Korea Institute of Science and Technology) ;
  • Lee, Dong-Hun (Global Environment Center, Korea Institute of Science and Technology) ;
  • Lee, Seung Jae (Global Environment Center, Korea Institute of Science and Technology) ;
  • Jin, Hyoun-Cher (Global Environment Center, Korea Institute of Science and Technology) ;
  • Bae, Gwi-Nam (Global Environment Center, Korea Institute of Science and Technology)
  • 이승복 (한국과학기술연구원 지구환경센터) ;
  • 이동훈 (한국과학기술연구원 지구환경센터) ;
  • 이승재 (한국과학기술연구원 지구환경센터) ;
  • 진현철 (한국과학기술연구원 지구환경센터) ;
  • 배귀남 (한국과학기술연구원 지구환경센터)
  • Received : 2011.03.10
  • Accepted : 2011.03.28
  • Published : 2011.03.31
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Abstract

The spatial distributions of air pollutants, in particular, ultrafine particles near traffic congestion roads at urban areas need to reduce human exposure levels for protecting public health. In this study, the number concentrations of ultrafine particles larger than 5 nm were measured every second during driving on the major roads of Nowon-gu, Seoul for 1.6 h using a mobile emission laboratory on October 5, 2010. The ultrafine particle number concentrations ranged from 7,009 to $265,600particles/cm^3$ with an average of $55,570particles/cm^3$, and these levels were comparable to concentrations of ultrafine particles larger than 3 or 7 nm on the arterial roads at urban areas in Los Angeles, USA and Zurich, Switzerland. It was frequently observed that the ultrafine particle number increased rapidly when vehicle speed was accelerated and it decreased sharply when vehicle speed was decelerated. The high peak events of ultrafine particle concentration larger than $200,000particles/cm^3$ were observed seven times during the measurement period. From the three repeated measurements during the short period of 50 min, it was concluded that the ultrafine particle number concentration on the road was significantly time-dependent. This on-road measurement approach can be utilized to manage vehicle-related air pollution in urban.

Keywords

References

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