AGS-PRF The Effect of Particle Viscosity in the Reactive Uptake of Isoprene-derived Epoxides to Submicron Aerosols

该项目支持博士后研究员在环境室中研究小颗粒的形成和生长。 人们对易挥发的植物排放物（如异戊二烯）在大气中形成小颗粒物非常感兴趣。 实验室的测量将有助于量化这种气相物质在大气中形成气溶胶质量的概率。了解异戊二烯形成二次有机气溶胶的一个关键途径是研究气溶胶颗粒对环氧化合物如二羟基环氧化物（IEPOX）和甲基丙烯酸环氧化物（MAE）的吸收动力学。 将在不同的相对湿度（RH）值下进行柜室研究，以探索粘度对反应性摄取的影响。 这项研究还将通过质谱技术定性和定量地研究颗粒化学成分随粘度变化的演变。 从这项研究中获得的结果将改进用于气候研究，空气质量评估，流行病学和其他环境健康领域的模型，这些领域可能会影响与气候变化和公共健康相关的公共政策。

This project supports a Postdoctoral Research Fellow to study the formation and growth of small particles in an environmental chamber. There is significant interest in the formation of small particles in the atmosphere from volatile plant emissions such as isoprene. Measurements in the laboratory will help to quantify the probability of such gas phase species forming aerosol mass in the atmosphere. A key approach for understanding the formation of secondary organic aerosols (SOAs) from isoprene is to study the uptake kinetics of epoxide species such as dihydroxyl epoxides (IEPOX) and methacrylic acid epoxide (MAE) on aerosol particles. Chamber studies will be performed at varying relative humidity (RH) values to explore the effects of viscosity on reactive uptake. This research will also examine the evolution of particle chemical composition as a function of viscosity both qualitatively and quantitatively through mass spectroscopic techniques. Results obtained from this research will improve models used in climate studies, air quality assessment, epidemiology, and other areas of environmental health that can affect public policy related to climate change and public health.