高等学校化学学报

高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (12): 2375.

• 研究论文 • 上一篇    下一篇

雾过程对大气气溶胶PM10中多环芳烃粒径分布的影响

樊曙先1,2,黄红丽2,顾凯华2,李红双1,朱彬3,张红亮2,范洋2   

  1. 1. 南京信息工程大学气象灾害教育部重点实验室, 南京 210044
    2. 南京信息工程大学大气物理学院, 南京 210044
    3. 南京信息工程大学中国气象局大气物理与大气环境重点开放实验室, 南京 210044
  • 收稿日期:2010-04-14 修回日期:2010-05-04 出版日期:2010-12-10 发布日期:2010-12-06
  • 通讯作者: 樊曙先 E-mail:shuxianf@nuist.edu.cn
  • 作者简介:樊曙先, 女, 博士, 教授, 从事有机气溶胶污染化学及大气环境化学方面的研究. E-mail: shuxianf@nuist.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 40775012), 江苏省高等学校自然科学重大基础研究项目(批准号: 08KJA170002), 公益性行业(气象)科研专项资金(批准号: GYHY200706026)和国家“九七三”计划预研项目(批准号: 2009CB426313)资助.

Effect of Fog Process on the Size Distribution of Polycyclic Aromatic Hydrocarbons in the Atmospheric Aerosol PM10

FAN Shu-Xian1,2*, HUANG Hong-Li2, GU Kai-Hua2, LI Hong-Shuang1, ZHU Bin3, ZHANG Hong-Liang2, FAN Yang2   

  1. 1. Key Laboratory of Meteorological Disaster, Ministry of Education, Nanjing University of Information Science & Technology, Nanjing 210044, China
    2. College of Atmospheric Physics, Nanjing University of Information Science & Technology, Nanjing 210044, China
    3. Open Key Laboratory for Atmospheric Physics and Environment of China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing 210044, China
  • Received:2010-04-14 Revised:2010-05-04 Online:2010-12-10 Published:2010-12-06
  • Contact: FAN Shu-Xian E-mail:shuxianf@nuist.edu.cn
  • About author:樊曙先, 女, 博士, 教授, 从事有机气溶胶污染化学及大气环境化学方面的研究. E-mail: shuxianf@nuist.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 40775012), 江苏省高等学校自然科学重大基础研究项目(批准号: 08KJA170002), 公益性行业(气象)科研专项资金(批准号: GYHY200706026)和国家“九七三”计划预研项目(批准号: 2009CB426313)资助.

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摘要： 在雾天气高发期间采集大气气溶胶PM10分级样品,测定了这些样品中的16种优控PAHs.结果表明：雾区近地层大气中PM2.1和PM9.0的平均质量浓度明显增加,雾过程改变了PM2.1的昼、夜浓度变化特征;雾前、雾中与雾后大气PM10中16种优控PAHs主要分布在比表面积大的细粒子上,平均有83.04%分布在Dp <2.1μm的范围,雾中1.1~2.1μm粒子的∑16PAHs浓度明显增加,Dp <0.65μm粒子的∑16PAHs浓度略有降低,说明雾过程对细粒子中∑16PAHs的浓度分布产生明显影响;雾前、雾中与雾后白天时间段,PM10分级粒子的∑16PAHs积聚模态分布出现较大差异,雾中积聚模态峰位置较雾前与雾后向较大粒径偏移;一次连续雾过程中,白天的∑16PAHs积聚模态峰位置随着雾的持续向大粒径方向偏移并停留在1.1~2.1μm;夜间的∑16PAHs积聚模态峰位置没有变化,均在1.1~2.1μm,说明PM10∑16PAHs的粒径分布受雾过程持续时间影响较大.

关键词: 多环芳烃, 雾过程, 大气气溶胶, PM10, 粒径分布 　　　　

Abstract: Fractionating samples of atmospheric aerosol PM10, collected during a fog high frequency period, were determined for 16 priority Polycyclic Aromatic Hydrocarbons (PAHs). Result shows that the average mass concentrations of PM2.1 and PM9.0 in the near surface layer of the fog area increase sufficiently, and the diurnal concentration variation of PM2.1 are changed due to fog process. Before, during and after fog event, the 16 priority Polycyclic Aromatic Hydrocarbons (PAHs) in the PM10 mainly distribute in the fine particles with larger specific surface area, and averagely, 83.04% of PAHs distribute on the aerosol with Dp <2.1μm. During the fog event, the concentrations of ∑16PAHs in the particles (Dp: 1.1~2.1μm) increase remarkably, whereas those in the particles (Dp <0.65μm) decrease slightly; therefore, fog process plays a great role on the distributions of ∑16PAHs in the fine particles. In the daytime before, during and after fog event, the distributions of ∑16PAHs in the accumulation mode have large differences; the peak diameter of accumulation mode shifts to the larger size during the fog event, compared with those before and after fog. In a prolonged fog event, the peak diameter of daytime ∑16PAHs accumulation mode shifts to the larger size continuously and stays at 1.1~2.1μm, while there is no significant variation of peak diameter in the nighttime, all at 1.1~2.1μm; subsiquently, the size distributions of ∑16PAHs in PM10 are greatly affected by the duration of the fog event.

Key words: Polycyclic Aromatic Hydrocarbons, fog event, atmospheric aerosol, PM10, size distribution

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