摘要
大气中光氧化反应是造成大气中复合污染,加剧中国大气环境污染的重要因素。为了研究汽车尾气在大气中的光氧化反应,设计制作了一套用于汽车尾气光氧化反应的较大容积的室内烟雾箱实验系统,该系统主要包括反应系统、进样系统和检测分析系统。反应系统采取了移动式对箱设置,尾气进样系统考虑了汽车尾气的排放特点,检测系统采取了负压采气装置。通过对该烟雾箱的光强分布、光解实验、NO_2及O_3衰减等系列的表征实验表明,该烟雾箱系统的一些性能较国内已有的烟雾箱有一定程度的提高,而且更适合于模拟汽车尾气的光氧化反应,同时,该系统具有采样方便、两箱对比和可模拟多种环境等特点。
The photooxidation causes the compound pollution in the atmosphere,which is an important factor of air pollution in China. An indoor smog chamber system for the study on photooxidation of automobile exhaust has been designed and manufactured,which includes sample system,reaction system and measuring system. Sample system is adapted to automobile exhaust characteristics,reaction system includes two removable chambers,and a negative pressure sampling device is adapted to the measuring system. The characterization experiments show that some properties of this system has been improved on existing chambers,including light intensity distribution,photodissociation experiments,NO_2 and O_3 attenuation. And this system is more suitable for the studies on the photooxidation of automobile exhaust. The main characteristics of this system are convenient sampling,being viable for comparative experiment of two chambers and provide a variety of simulation environment.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2016年第12期7-11,共5页
Environmental Science & Technology
基金
国家自然科学基金项目资助(51376095)
江苏省环保科研课题(2014049)
关键词
烟雾箱
光化学
表征实验
汽车尾气
smog chamber
photochemistry
characterization experiment
automobile exhaust
