Gas Phase and Heterogeneous Tropospheric Chemistry

9702791安迪诺该项目将作为国家科学基金会职业计划的一部分进行。科学计划集中在两个领域：1)含氧有机化合物(如饱和醇和醚)与羟基自由基反应的气相研究(包括反应动力学和产物测定)；以及2)在氯化物、硝酸盐或硫酸盐颗粒存在下，羟基与四种低分子量烃(甲烷、正丁烷、正庚烷和叔丁醇)反应动力学的多相研究。这项研究将利用玻璃封闭式光化学反应室以及傅里叶变换红外光谱(FTIR)和气相色谱-串联质谱仪(GC-MS/MS)相结合的方法来测量室内的化学反应物和产物。将进行互补的从头计算，以确定可能的反应路径。这些气相和非均相研究将提供有关含氧有机物的光化学和气固两相对反应动力学影响的基本信息，从而提高城市空气质量模型的准确性。在教育计划方面，研究人员将通过将建模活动纳入课堂环境来改进大气化学的教学方法。PI计划开发的环境工程课程以解决问题的各个方面为中心，包括：理解问题、描述其组成部分、提出解决方案(S)和执行解决方案。此外，PI还概述了一项招聘计划，以吸引和留住环境科学和工程领域代表性不足的学生。

9702791 Andino The project will be conducted as part of the NSF CAREER Program. The science plan is focused on two areas: 1) gas-phase studies (including reaction kinetics and product determinations) of the hydroxyl radical reactions with oxygenated organic compounds (e.g., saturated alcohols and ethers); and 2) heterogeneous studies of the kinetics of the hydroxyl radical with four low molecular weight hydrocarbons (methane, n-butane, n-nonane and tert-butyl alcohol) in the presence of chloride, nitrate, or sulfate particles. This research will utilize a glass-enclosed photochemical reaction chamber and a combination of Fourier transform infrared spectroscopy (FTIR) and gas chromatography-tandem mass spectrometry (GC-MS/MS) for measurements of the chemical reactants and products within the chamber. Complementary ab initio calculations will be performed to identify likely reaction pathways. These gas-phase and the heterogeneous studies will improve the accuracy of urban air quality models by providing essential information about the photochemistry of oxygen-containing organic compounds and the gas-particle effects on reaction kinetics. For the educational plan, the investigator will improve teaching methods for atmospheric chemistry by incorporating modeling activities within the classroom setting. The environmental engineering courses the PI plans to develop are centered on aspects of problem-solving including: understanding a problem, describing its components, proposing a solution(s), and executing the solution. In addition, the PI has outlined a recruitment program to attract and retain underrepresented students in environmental science and engineering.