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

Title
Characteristics of spatial distribution of ultrafine particle number concentration on the roads of Nowon-gu, Seoul
Authors
이승복이동훈이승재진현철배귀남
Keywords
ultrafine particle; spatial distribution; mobile emission laboratory; on-road measurement
Issue Date
2011-03
Publisher
Particle and aerosol research; 한국입자에어로졸학회지
Citation
VOL 7, NO 1, 21-30
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 265,600 particles/㎤ with an average of 55,570 particles/㎤, 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 Zürich, 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 200,000 particles/㎤ 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.
URI
http://pubs.kist.re.kr/handle/201004/40707
ISSN
1738-8716
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KIST Publication > Article
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