SEASONAL AND DIURNAL VARIATIONS OF PM_(1.0),PM_(2.5) AND PM_(10) IN THE ROADSIDE ENVIRONMENT OF HONG KONG

作     者：K.F. Ho S.C. Lee S.W. Law 

作者机构：Research Center of Urban Environmental Technology and Management Department of Civil and Structural Engineering Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong China 

出 版 物：《China Particuology》 (中国颗粒学报)

年 卷 期：2006年第4卷第6期

页      面：312-315页

核心收录：

学科分类：12[管理学] 1204[管理学-公共管理] 083305[工学-城乡生态环境与基础设施规划] 08[工学] 0833[工学-城乡规划学] 

基　　金：Research Grants Council of Hong Kong(PolyU5145/03E) 

主　　题：PM1.0 PM2.5 PM10 seasonal variations roadside environment Hong Kong 

摘      要：PM1.0 （fine particles, with diameter 〈 1 pm）, PM2.5 （fine particles, with diameter 〈 2.5μm） and PM10 （coarse particles, with diameter 〈 10 μm） were measured at 24-hour intervals near a high-traffic road in Hong Kong, from October 2004 to September 2005. Mass concentrations were determined for the three particle fractions, averaging for PM1.0, PM2.5 and PM10, respectively, 44.5±18.4, 55.4±25.5 and 81.3±37.7μg·m^-3, PM2.5 was 3.7 times the U.S. EPA＇s annual NAAQS of 15 μg·m^-3,. Overall, PM1.0 accounted for 44 to 69% （average 57%） of PM10, while PM2.5 accounted for 58 to 82% （average 71%） in this study. The particulate masses showed obvious seasonal patterns with high concentrations in cold seasons and low in warm seasons, especially high concentrations of PM2.5-10 during the cold seasons. Diurnal variations of mass concentrations of PM2.5 were determined during July, showing two major peaks in the morning and afternoon rush hours.