大气与环境光学学报 ›› 2012, Vol. ›› Issue (5): 348-357.

• 环境光学监测技术 • 上一篇    下一篇

光照对柠檬烯臭氧氧化产生二次有机气溶胶的影响

刘志,胡长进,程 跃,潘 刚,郑晓宏,顾学军,赵卫雄,张为俊*   

  1. (中国科学院安徽光学精密机械研究所大气物理化学研究室,安徽 合肥 230031)
  • 收稿日期:2012-03-06 修回日期:2012-03-20 发布日期:2012-10-21
  • 通讯作者: 刘志(1988-),男,河南信阳人,硕士研究生,主要从事大气光化学和二次有机气溶胶研究. E-mail:wjzhang@aiofm.ac.cn
  • 作者简介:刘志(1988-),男,河南信阳人,硕士研究生,主要从事大气光化学和二次有机气溶胶研究.
  • 基金资助:

    国家自然科学基金(10979061,40975080)、中科院安徽光学精密机械研究所所长基金(YO3AG31147)、中国科学院知识创新工程重要方向性项目(KJCX2-YW-N24)资助

Effect of Illumination on Secondary Organic Aerosol Formation from Ozonolysis of Limonene

LIU Zhi, HU Chang-jin, CHENG Yue, PAN Gang, ZHENG Xiao-hong, GU Xue-jun, ZHAO Wei-xiong, ZHANG Wei-jun*   

  1. (Laboratory of Atmospheric Physico-Chemistry, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China)
  • Received:2012-03-06 Revised:2012-03-20 Online:2012-10-21

摘要:

作为一种重要的生物源挥发性有机物,柠檬烯的臭氧氧化是大气环境中二次有机气溶胶(SOA)的重要来源之一。基于实验室烟雾箱模拟系统,研究了紫外光照对柠檬烯臭氧氧化形成SOA的影响。实验分别对无光照(即“暗反应”)和有光照条件下反应前体物的消耗、SOA的质量浓度以及SOA的粒径分布随时间的变化等进行了实时探测,并结合气粒分配模型对产率进行了分析。研究结果表明在相应的实验条件下,紫外光照会导致SOA产率下降10-16%,而气相氧化阶段相关中间产物或者最终产物的光化学反应可能是导致产率下降的重要原因之一。

关键词: 光照, 柠檬烯, 臭氧氧化, 二次有机气溶胶, 烟雾箱

Abstract:

As an important biogenic volatile organic compound, ozonolysis of limonene is a significant source of atmospheric secondary organic aerosol (SOA). Quantitative research on ozonolysis of limonene was reported under both dark and UV-illuminated conditions in the self-made smog chamber. The time evolutions of limonene precursor, SOA mass concentration as well as SOA particle size distributions were investigated continuously, and the yield of SOA was analyzed according to the gas/particle partitioning theory. It is shown that exposure to UV light reduces SOA yield by 10%~16% under corresponding conditions, and it is proposed that gas-phase photolysis of some intermediate or final products may play a key role in the decline of yields in the presence of UV light.

Key words: illumination, limonene, ozonolysis, secondary organic aerosol, smog chamber

中图分类号: