基于差分吸收光谱技术(DOAS)的气态汞污染测量

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。

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 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.

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李传新, 刘文清, 司福祺, Liu Yu, 胡仁志. 基于差分吸收光谱技术(DOAS)的气态汞污染测量[J]. 大气与环境光学学报, 2012, 7(1): 38. Li Chuanxin, Liu Wenqin, Si Fuqi, Liu Yu, Hu Renzhi. Atmospheric Mercury Pollution with Differential Optical Absorption Spectroscopy (DOAS)[J]. Journal of Atmospheric and Environmental Optics, 2012, 7(1): 38.

基于差分吸收光谱技术(DOAS)的气态汞污染测量

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