標題: Removal Efficiency of Bimodal PM2.5 and PM10 by Electret Respirators and Mechanical Engine Intake Filters
作者: Chen, Sheng-Chieh
Chang, De-Qiang
Pei, Chenxing
Tsai, Chuen-Jinn
Pui, David Y. H.
環境工程研究所
Institute of Environmental Engineering
關鍵字: PM2.5 in China;PM2.5 health effect;PM10;Bimodal ambient PM;Electret respirator;Mechanical engine intake filter;Long range transport
公開日期: 七月-2016
摘要: As China is receiving an economic boom, PM (particulate matter) pollutions not only have become a serious regional problem but also frequently impacted its neighboring counties, e.g., Korea and Japan. In addition to its adverse effects on human health, the on-and off-road engines operated in ambient can also be affected. In this study, a simple system for generating simulated ambient bimodal PMs comprising fine (PM2.5), coarse (PM2.5-10) particles was developed for evaluating the initial efficiency of seven respirator and four engine intake filters. In addition to the size fractional efficiency curves for each filter media determined from the SMPS (scanning mobility particle sizer) and APS (aerodynamic particle sizer), both number and mass based efficiency of these filters for PM2.5, PM2.5-10 and PM10 were also obtained to evaluate their performances against ambient PM pollutions. Data showed that the engine intake filters had a low efficiency for both mass and number based PM2.5, which was only about 25-30%. However, there was a large difference between their number and mass based PM10 efficiency. The former was much lower than the latter because these filters are with high efficiency only for coarse particles. Besides, the most of particles in number was resided in the fine size range while the mass was in coarse size range. For the respirator filtration tests, results showed that most of them can effectively remove both PM2.5 and PM10, in which the mass efficiency was always higher than that of number. The PM2.5 number efficiency results showed there are three out of seven respirator filters are with N-95 rated level, in which the efficiency of their most penetrating particle size is higher than 95%. The current simple experimental system could be applied to examine different purpose filters which protect human health and outdoor engines against ambient PM2.5 and PM10.
URI: http://dx.doi.org/10.4209/aaqr.2015.08.0494
http://hdl.handle.net/11536/133887
ISSN: 1680-8584
DOI: 10.4209/aaqr.2015.08.0494
期刊: AEROSOL AND AIR QUALITY RESEARCH
Volume: 16
Issue: 7
起始頁: 1722
結束頁: 1729
顯示於類別:期刊論文