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石家庄秋季可吸入颗粒物的垂直分布特征 预览 被引量:11

The vertical distribution characteristics of respirable particles in autumn of Shijiazhuang
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摘要 研究了石家庄市秋季可吸入颗粒物质量浓度垂直分布和粒度分布特征.结果表明,环境空气中可吸入颗粒物的众径为0.2~1.0μm,比表面积为3536.2~4396.06m^2/kg,PM2.5/PM10高达71.28%~81.14%;细小颗粒物累积百分含量随高度增加而增加,PM2.5和PM10累积分布随高度增加呈现出对数增加的规律;采样高度1.5m时,中位径D50〉1μm,高度大于1.5m时,D50〈1μm.不同高度降尘的比表面积为336.55~790.06m^2/kg,PM2.5/PM10为19.46%~22.47%,D50为9.66~13.78μm,D98在34.93~53.48μm之间. This paper studies the vertical distribution of the mass concentration and particle size distribution of the respirable particles in autumn of Shijiazhuang. The results show that the diameter with the largest content is 0.2 1.0μm and the BET area of respirable particles in the atmosphere is 3536.2- 4396.06m^2/kg. The PM2.5 to PMlo ratio ranged from 71.28% to 81.14%. The accumulative content of the very small respirable particles is increasing with the sampling height. Moreover, PM2.5 and PMlo is logarithmic increasing with the sampling height. The Dso is 〉 1μm when the sampling height≤ 1.5m and D50 is 〈 1μm when the sampling height 〉 1.5m. For the dry depositions at different sampling heights, exhibit that D50 is 9.66 - 13.78μm and the BET area is 336.55 -790.06m^2/kg and PM2.5/PM10 is 19.46% - 22.47% and D98 is 34.93 - 53.48μm.
作者 郭斌 任爱玲 李良玉 赵文霞 GUO Bin, REN Ai-Ling, LI Liang-Yu, ZHAO Wen-Xia (1 College of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China 2 Hebei Polytechnic University, Tangshan 063009, China)
出处 《中国科学院研究生院学报》 CAS CSCD 2007年第5期 714-719,共6页 Journal of the Graduate School of the Chinese Academy of Sciences
基金 河北省科技攻关课题(02457204D)和河北科技大学创新团队建设项目(083002)共同资助
关键词 可吸入颗粒物 质量浓度 粒度分布 垂直分布 respirable particles, mass concentration, particle size distribution, vertical distribution
作者简介 通信联系人,E-mail:ailingr@163.com
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