標題: Ultrafine Particles and PM2.5 at Three Urban Air Monitoring Stations in Northern Taiwan from 2011 to 2013
作者: Lin, Guan-Yu
Lee, Guo-Rui
Lin, Sih-Fan
Hung, Yi-Hung
Li, Shih-Wei
Wu, Guo-Jei
Ye, Huajun
Huang, Wei
Tsai, Chuen-Jinn
環境工程研究所
Institute of Environmental Engineering
關鍵字: PM2.5;Nanoparticle measurement;Ultrafine particles;Effective density
公開日期: 1-Nov-2015
摘要: In this study, long term measurements of PM2.5 and ultrafine particles (UFPs) for daily average mass concentration at Zhongshan (ZS), Sinjhuang (SJ), and Jhudong (JD) urban air monitoring stations were conducted from 2011 spring to 2013 autumn. The results showed that daily average UFPs mass concentrations in spring (average at 3 stations: 1.58 +/- 0.74 mu g m(-3)) and summer (average at 3 stations: 1.59 +/- 0.53 mu g m(-3)) were higher than those in autumn (average at 3 stations: 1.02 +/- 0.28 mu g m(-3)) and winter (average at 3 stations: 1.04 +/- 0.48 mu g m(-3)) due to the impacts by heavy traffic emission and new particle formation event. The effective density (rho(eff)) and dynamic shape factor (chi) for ultrafine particles (UFPs) were found to be 0.68 +/- 0.16 g cm(-3) and 2.06 +/- 0.19, respectively, suggesting that the particle morphology was irregular shape. Based on the calculated rho(eff) and chi, the average number and surface area concentration ratio of UFPs to those of PM2.5 at these monitoring stations was determined to be 89.0 +/- 5.5% and 42.1 +/- 12.8%, respectively, suggesting that UFPs contribute significantly to the health-relevant PM2.5 aerosol fraction in these stations.
URI: http://dx.doi.org/10.4209/aaqr.2015.04.0271
http://hdl.handle.net/11536/128392
ISSN: 1680-8584
DOI: 10.4209/aaqr.2015.04.0271
期刊: AEROSOL AND AIR QUALITY RESEARCH
Volume: 15
起始頁: 2305
結束頁: 2319
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