大气与环境光学学报 ›› 2012, Vol. 7 ›› Issue (1): 38-43.

• 环境光学监测技术 • 上一篇    下一篇

基于差分吸收光谱技术(DOAS)的气态汞污染测量

李传新1,2 ,刘文清2, 司福祺2 ,胡仁志2   

  1. 1中国科学技术大学光学与光学工程系 安徽合肥 230026; 2中国科学院安徽光学精密机械研究所中国科学院环境光学与技术重点实验室 安徽合肥 230031
  • 收稿日期:2011-05-12 修回日期:2011-09-19 出版日期:2012-01-25 发布日期:2011-12-27
  • 作者简介:李传新(1988-),男,安徽合肥人,中国科学技术大学硕士研究生 邮箱 cxli@aiofm.ac.cn

Atmospheric Mercury Pollution with Differential Optical Absorption Spectroscopy(DOAS)

LI ChuanXin1,2, LIU WenQin2,SI FuQi2,LIU Yu2,HU RenZhi2   

  1. 1 Department of Optics & Optical Engineering, University of Science and Technology of China, Hefei 230026, China; 2 Key Lab of Environment Optics and Technology, Anhui Institute of Optics and Fine Mechanics ,Chinese Academy of Sciences ,Hefei 230031,China
  • Received:2011-05-12 Revised:2011-09-19 Published:2012-01-25 Online:2011-12-27

摘要:

中国大气汞污染严重,是全球范围大气汞污染最为严重的区域之一。汞主要以单质形式长时间存在于大气中,并可进行长距离传输。对差分吸收光谱技术(DOAS)应用于大气汞测量的可行性进行了研究。首先,通过测量不同长度的饱和汞蒸气样品池对光谱的吸收,了解汞共振线的吸收情况;并分析了汞样气对高分辨率光谱仪的响应;最后,利用现有仪器对大气汞吸收进行了测量,确定了主要干扰气体及大气汞测量对仪器光谱分辨率的要求,为进一步的大气汞测量及燃煤烟气中高浓度汞测量提供了先期技术支持。

关键词: 环境光学, 差分吸收光谱技术, 汞蒸气, 燃煤烟气

Abstract:

In China, atmospheric mercury pollution is serious and is considered to be the largest mercury quantity emissions in world. Mercury can retain elemental form for a long time in atmosphere, and also can be transmitted for a long-distance. The feasibility studies of the technology of the differential optical absorption spectroscopy (DOAS) technology that applied for atmospheric mercury measurement were discussed. First, mercury resonance absorption is studied by the measurement of cells of mercury vapor with different lengths, then the absorption of saturated mercury vapor is analyzed using high-resolution spectrometer. Finally, with the current instrument, the concentration of mercury in air is measured. Through the experiment, main interfering gases are identified, and the requirement of the resolution of spectrometer is ensured. The research result provides advanced technical support for further measurements of mercury in the atmospheric and the mercury of high concentration in flue gas.

Key words: environmental optics, differential optical absorption spectroscopy, mercury vapor, Flue gas

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