【作者】 吴丰成； 谢品华； 李昂； 司福祺； 窦科； 刘宇； 徐晋； 王界；

【Author】 Wu Fengcheng,Xie Pinhua,Li Ang,Si Fuqi,Dou Ke,Liu Yu,Xu Jin,Wang Jie Key Laboratory of Environmental Optics & Technology,Anhui Institute of Optics and Fine Mechanic,Chinese Academy of Sciences,Hefei 230031,China

【机构】 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；

【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,在大气化学中扮演了重要的角色。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,观测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。更多还原

【Abstract】 Formaldehyde (HCHO) is the most abundant carbonyl compounds that plays an important role in atmospheric chemistry and photochemical reactions.Formaldehyde is an important indicator of atmospheric reactivity and urban atmospheric aerosol precursors.In this paper,the emission of formaldehyde from chemical area was measured using the mobile differential optical absorption spectroscopy (DOAS).This instrument using the zenith scattered sunlight as the light source,successfully sampling in the area loop.Vertical column density was retrieved by this system,combining with the meteorological (wind field),car speed information,the emission of formaldehyde in the area was estimated.We 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 was605kg/h during the measuring period.更多还原