A Study of PM2.5 at Zhudong Air Monitoring Station

• Main Authors: Cheng, Ye-Chuan, 程葉川
• Other Authors: Tsai, Chuen-Jinn
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/69209312923475147057

碩士 === 國立交通大學 === 環境工程系所 === 103 === In this study, two real-time measurement monitors, APM-2(Air Pollution Monitor 2, Comde-Derenda GmbH, Germany) and TEOM-FDMS(tapered element oscillating microbalance with filter dynamic measurement system) were deployed at Zhudong air monitoring station in order to measure the PM2.5 mass concentrations. At the same time, a Semi-Continuous OC-EC Field Analyzer(Model-4, Sunset laboratory, USA), and a PILS(Particle into Liquid Sampler) were used to analyze the organic carbon, element carbon, and water soluble ions. This study consisted of two study periods: 2014/9/9-2014/11/14(fall) and 2015/2/2-2015/4/13(spring). The accuracy of APM-2 was validated by comparing its daily average PM2.5 concentrations with TEOM-FDMS data. Results showed good correlations between these two monitors. The liner regression slope and R2 were 0.89 and 0.97, respectively. Comparing the daily average PM2.5 concentrations of APM-2 with those of the BAM(Beta attenuation mass monitor), which is the PM2.5 monitor in Taiwan air monitoring stations, showed that the liner regression slope was 0.90 and R2 was 0.95. Concluding from the real-time monitoring data, the major contribution of PM2.5 was found to be vehicle emissions and secondary aerosols. The main component of ion was SO42-, NH4+and NO3- in which SO42- was the major component of PM2.5 with the percentage of 32.6±11.2% in fall and 26.8±6.6% in spring. Organic carbon and NH4+ each accounted for about one tenth of PM2.5 in both seasons. All of the measured ions, EC and OM accounted for 72.1 ± 17.8 % (fall) and 75.2 ± 21.0 % (spring) of PM2.5.