基于车载被动差分光学吸收光谱技术的甲醛排放通量遥测研究  

Studies on the Remote Measurement of the Emission of Formaldehyde by Mobile Differential Optical Absorption Spectroscopy

作　　者：吴丰成[1] 谢品华[1] 李昂[1] 司福祺[1] 窦科[1] 刘宇[1] 徐晋[1] 王界[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所环境光学与技术重点实验室,安徽合肥230031

出　　处：《光谱学与光谱分析》2011年第11期3006-3009,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(40905010);国家自然科学基金项目(40805015);国家高技术研究发展计划(863)项目(2009AA063006);安徽省优秀青年科技基金项目(10040606Y28)资助

摘　　要：甲醛(HCHO)是大气中含量最为丰富的羰基化合物,广泛参与大气中的光化学反应,是一种重要的大气反应活性的指示剂以及城市大气气溶胶的前体物,在大气化学中扮演着重要的角色。本文初步探索了利用车载被动差分光学吸收光谱技术(differential optical absorption spectroscopy,DOAS)遥测化工区HCHO的排放通量。该系统以天顶方向的太阳散射光为光源,围绕区域一周连续采样测量,获得采样点上的HCHO的垂直柱密度,并结合测量时间内的车速和风场(风速、风向)信息,计算得出工业区域的HCHO排放通量。利用此技术对北京某化工厂进行观测实验,结果表明在测量时间内该区域的HCHO排放通量的平均值为605kg.h-1。Formaldehyde（HCHO） is the most abundant carbonyl compounds that play an important role in atmospheric chemistry and photochemical reactions.Formaldehyde is an important indicator of atmospheric reactivity and urban atmospheric aerosol precursors.In the present paper,the emission of formaldehyde from chemical area was measured using the mobile differential optical absorption spectroscopy（DOAS）.This instrument uses the zenith scattered sunlight as the light source with successful sampling in the area loop.Vertical column density was retrieved by this system,combined with the meteorological wind field and car speed information,the emission of formaldehyde in the area was estimated.The authors carried out the measuring experiment in one chemical plant in Beijing using this technology.The result showed that the average value of the flux of formaldehyde in this area was 605 kg·h-1 during the measuring period.

关 键 词：车载DOAS HCHO 排放通量 污染源 

分 类 号：O433.51[机械工程—光学工程]