Ambient and indoor PM1/PM2.5/PM10 characteristics in urban atmosphere

• Main Author: 林家和
• Other Authors: 李芝珊
• Format: Others
• Language: zh-TW
• Published: 2000
• Online Access: http://ndltd.ncl.edu.tw/handle/44315995947800865528

碩士 === 國立臺灣大學 === 環境衛生研究所 === 88 === ABSTRACT The study was to evaluate mass concentration and carbonaceous materials of PM1/PM2.5/PM10 in ambient and indoor envrronment. Ambient PM1/PM2.5/PM10 characteristics were determined by a high volume Trichotomous sampler in two monitoring stations in Taipei urban area . In addition , indoor PM1 and PM2.5 concentration were evaluated in ten residences in summer and winter by a PM1 cyclone and PM2.5-PEM(Personal Environment Monitor) , respectively . The results demonstrated that PM1/PM2.5/PM10 mass concentration were 14.0、24.4、48.1 mg/m3 and 29.5、34.4、46.0 mg/m3 in the general and traffic monitoring stations , respectively . Moreover , the mean PM1/ PM10 , PM2.5/PM10 , and PM1/PM2.5 ratios were 0.43 , 0.56 , and 0.77 in the general monitoring stations . For the traffic monitoring stations , the mean PM1/ PM10 , PM2.5/PM10 , and PM1/PM2.5 ratios were 0.52 , 0.58 , and 0.90 in the traffic monitoring stations .The mean TC/mass ratio of PM1/PM2.5/PM10 were 0.63 , 0.54 , and 0.38 in general monitoring stations , respectively . For the traffic monitoring stations , the mean TC/mass ratio of PM1/PM2.5/PM10 were 0.80 , 0.71 , and 0.60 .The OC/EC ratio of PM1/PM2.5/PM10 were 1.79 , 1.28 , and 1.40 in the general monitoring stations ; therefore,OC/EC ratio of PM1/PM2.5/PM10 were 1.01 , 1.07 , and 1.46 in the general monitoring stations . According to these data above , indicated that PM1 was mostly from traffic sources . Regarding indoor PM1 and PM2.5 , the summer PM1 mass concentration were 25.4 and 24.8 mg/m3 in indoor and outdoor ; For the summer PM2.5 mass concentration were 36.6 and 36.3 mg/m3 in indoor and outdoor . Furthermore , the winter PM1 mass concentration were 26.4 and 27.0 mg/m3 in indoor and outdoor ; For the summer PM2.5 mass concentration were 38.7 and 38.3 mg/m3 in indoor and outdoor . Moreover , the mean summer PM1/PM2.5 ratios were 0.69 , 0.68 in the indoor and outdoor ; and the mean winter PM1/PM2.5 ratios were 0.67 , 0.71 . There was no statistically significant . The mean TC/mass ratio of PM1/PM2.5 were 0.50 , 0.47 , respectively . The summer OC/EC ratio of PM1 and PM2.5 were 2.17 , 2.99 ; therefore , the winter OC/EC ratio of PM1 and PM2.5 were 1.98 , 2.62 . We can said that photochemical reaction is stronger in summer .