| 大气颗粒物吸湿性研究 |
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| 引用本文： | 王宗爽,付晓,王占山,徐舒,陈建华,武雪芳,吴钢. 大气颗粒物吸湿性研究[J]. 环境科学研究, 2013, 26(4): 341-349 |
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| 作者姓名： | 王宗爽 付晓 王占山 徐舒 陈建华 武雪芳 吴钢 |
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| 作者单位： | 1.中国科学院生态环境研究中心, 城市与区域生态国家重点实验室, 北京100085 |
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| 基金项目： | 国家自然科学基金项目，国家"十二五"科技支撑计划项目 |
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| 摘 要： | 大气颗粒物吸湿性是反映颗粒物理化性质的重要指标,吸湿性研究对深入了解颗粒物的环境和健康效应具有重要意义. 总结了国外近年来大气颗粒物吸湿性研究进展:①典型的大气颗粒物吸湿性分析方法为H-TDMA(吸湿性串联差分电迁移率粒径分析仪)系统及其优化方法. ②大气颗粒物吸湿性呈单峰、双峰甚至多峰分布；根据Gf(吸湿性生长因子)随粒径变化的模式,可将大气颗粒物分为强吸湿性和弱吸湿性2类,也可分为纯不溶性、混合不溶性、混合可溶性和纯可溶性4类. ③城市背景点颗粒物的Gf比城市观测点高；城市观测点的颗粒物Gf分布呈夏季高、冬季低,白天高、晚上低的特征. ④颗粒物吸湿性与其化学组成和形态密切相关,纯可溶性盐颗粒物的Gf通常较高. ⑤柴油燃烧源新排放的颗粒物属于弱吸湿性颗粒物,Gf非常小,但在其表面老化后或随燃料中硫含量的增加Gf会明显变大. ⑥生物质燃烧排放颗粒物的Gf相对较高,但存在区域差异性. 针对国内大气颗粒物吸湿性研究现状,提出了未来重点研究方向.
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| 关 键 词： | 大气颗粒物 吸湿性 生长因子 串联差分电迁移率粒径分析仪 燃烧源 |
| 收稿时间： | 2012-12-10 |
| 修稿时间： | 2013-02-01 |
Research Progress of the Hygroscopicity of Atmospheric Particles |
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| WANG Zong-shuang,FU Xiao,WANG Zhan-shan,XU Shu,CHEN Jian-hu,WU Xue-fang and WU Gang. Research Progress of the Hygroscopicity of Atmospheric Particles[J]. Research of Environmental Sciences, 2013, 26(4): 341-349 |
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| Authors: | WANG Zong-shuang FU Xiao WANG Zhan-shan XU Shu CHEN Jian-hu WU Xue-fang WU Gang |
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| Affiliation: | 1.State Key Laboratory of Urban and Regional Ecology, Research Centre for Eco-Environmental Sciences,Chinese Academy of Sciences, Beijing 100085, China2.Chinese Research Academy of Environmental Sciences, Beijing 100012, China |
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| Abstract: | From the view of healthy and environmental effects of particles, it is necessary to research the hygroscopicity of atmospheric particles, since it is an important factor to reflect their physical and chemical properties. The studies about the hygroscopicity in recent years were reviewed in this study. The typical equipment for hygroscopicity was hygroscopicity tandem differential mobility analyzer (H-TDMA) or improved H-TDMA. The Gf(observed growth factor) exhibited the single peak, two peaks or even multiple peaks. According to Gf, the particles could be divided into four types including pure insoluble, mixed insoluble, mixed soluble and pure soluble particles. The Gf showed higher values for particles in urban background sites than those for urban sites. The Gf for particles in urban area was higher in summer than that in winter and was higher during the daytime than that during the nighttime. The hygroscopicity of particles mainly depended on their chemical compositions and shapes. The Gf for pure soluble salt particles was usually higher. Fresh particles from diesel combustion showed less hygroscopic with low Gf, while their Gf could be enhanced with the particle aging and the fuel sulfur content increase. The Gf for particles from biomass burning was high and had obvious spatial variation. According to the domestic hygroscopic research status of atmospheric particulate matter, a key research direction was suggested for the future. |
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| Keywords: | atmospheric particles hygroscopicity growth factor hygroscopicity tandem differential mobility analyzer (H-TDMA) combustion sources |
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