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

查看全文 作　　者：K.F. [1]Ho;S.C. [1]Lee;S.W. [1]Law

机构地区：[1]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　　处：《China Particuology》索引2006年第4卷第6期,共4页

摘　　要：PM1.0 (fine particles, with diameter < 1 μm), PM2.5 (fine particles, with diameter < 2.5 μm) 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±37.7 μg?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. 关键词：香港城区颗粒污染路边环境季变化日变化 PM1.0 PM2.5 PM10

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

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