標題: Ultrafine particles at three different sampling locations in Taiwan
作者: Chen, Sheng-Chieh
Tsai, Chuen-Jinn
Chou, Charles C. -K.
Roam, Gwo-Dong
Cheng, Sen-Sung
Wang, Ya-Nan
環境工程研究所
Institute of Environmental Engineering
關鍵字: Atmospheric aerosol;Ultrafine particle;Artifact of organic carbon;Chemical mass closure;Particle effective density
公開日期: 1-二月-2010
摘要: Atmospheric ultrafine particles (UPs or PM(0.1)) were investigated at the roadside of Syuefu road in Hsinchu city, in the Syueshan highway tunnel in Taipei and in the NTU Experimental Forest in Nantou, Taiwan. A SMPS (TSI 3936) and three MOUDIs (MSP 110) were collocated to determine the number and mass concentrations of the PM(0.1) simultaneously. The filter samples were further analyzed for organic carbon (CC), element carbon (EC), water-soluble ions and trace elements. Taking into account the OC artifact of PM(0.1), good chemical mass closure (ratio of the reconstructed chemical mass to the gravimetrical mass of PMs) was obtained with an unknown percentage of 10.6, 26.2 and 37.2% at the roadside, tunnel and forest, respectively. The unexplained mass was attributed to aerosol water in this study. The artifact at the roadside, tunnel and the forest PM(0.1) mass was found to be as high as 51.6 +/- 10.7%, 20.0 +/- 5.4% and 85.6 +/- 18.4%, respectively. Finally, the effective density of the roadside, tunnel and forest PM(0.1) was calculated based on the results of chemical speciation and found to be 1.45, 1.29 and 1.22 g cm(-3), respectively, which was in good agreement with that obtained by using the method of Spencer et al. (2007). Based on these results, it is foreseeable that the number concentration of the SMPS can be converted using the effective density determined by Spencer et al. (2007) for the real time measurement of the PM(0.1) concentration. (C) 2009 Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.atmosenv.2009.10.044
http://hdl.handle.net/11536/5887
ISSN: 1352-2310
DOI: 10.1016/j.atmosenv.2009.10.044
期刊: ATMOSPHERIC ENVIRONMENT
Volume: 44
Issue: 4
起始頁: 533
結束頁: 540
顯示於類別:期刊論文


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