Laboratory Studies of the Chemistry of Sea Salt Particles and Their Role in Tropospheric Chemistry

碱卤化物粒子在大气中形成光化学反应物质的反应是目前人们非常感兴趣的。这些颗粒，尤其是氯化钠，不仅在海洋边界层中无处不在，而且在科威特燃烧油井的烟柱、固体火箭推进剂的废气以及埃尔奇琴火山的排放物中也发现了它们的存在。本课题将对碱卤化物与各种氮氧化物和臭氧反应的动力学和机理进行研究。这将通过使用相对较新的、但可能非常有价值的漫反射红外光谱（DRIFT）技术来完成，该技术允许人们在反应发生时实时跟踪气体和盐的表面。重点将放在理解基本的化学过程上，特别是表面的性质如何控制对大气重要的反应。

ATM-9302475 Finlayson-Pitts The reactions of alkali halide particles in the atmosphere to form photochemically reactive species is currently of great interest. Such particles, particularly sodium chloride, are not only ubiquitous in the marine boundary layer, but also have been found in the plumes from burning oil wells in Kuwait, in the exhaust from solid rocket propellants, and in emissions from the El Chichon volcano. In this project studies of the kinetics and mechanisms of the reactions of alkali halide with various nitrogen oxides and ozone will be undertaken. This will be accomplished through the use of the relatively new but potentially very valuable technique of diffuse reflectance infrared spectroscopy (DRIFT), which allows one to follow both the gases and the surfaces of the salt in real time as the reactions are occurring. The emphasis will be on understanding the fundamental chemical processes, especially how the nature of the surface controls reactions of atmospheric importance.