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

ATM-9302475 碱金属卤化物颗粒在大气中形成光化学活性物质的反应是目前研究的热点。 这种颗粒，特别是氯化钠，不仅在海洋边界层中无处不在，而且在科威特燃烧的油井威尔斯的羽流、固体火箭推进剂的废气和El Chichon火山的排放物中也发现了这种颗粒。 本项目将研究碱金属卤化物与各种氮氧化物和臭氧反应的动力学和机理。 这将通过使用相对较新但可能非常有价值的漫反射红外光谱（DRIFT）技术来实现，该技术允许人们在反应发生时真实的时间内跟踪气体和盐的表面。 重点将是了解基本的化学过程，特别是如何表面的性质控制大气的重要性反应。

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.