Secondary Organic Aerosol Formation by Partitioning and Heterogeneous Reactions: Parameterization, Characterization, and Predictive Model

该项目的目标是：(1)通过研究SOA中的分区和异质化学来更好地理解二次有机气溶胶（SOA）的形成，(2)开发一个预测SOA形成的模型，该模型包括气相动力学、分区和酸性SOA中的异质化学效应。实验将在室内进行，气相物质和产物将用各种各样的化学和物理技术进行分析。将获得各种前体气体形成SOA的数据，包括相对湿度、温度和气溶胶种子成分的影响。将为中酸性和强酸性气溶胶开发异质SOA形成的初始模型；然后将其推断为弱酸性或中性条件，这更真实地反映了周围空气的条件。该项目将引导您深入了解常规划分理论无法解释的全局SOA来源。本科生和研究生将参与这个项目，学习实验技术和建模。这项培训将帮助他们为在大气环境化学领域取得成功奠定坚实的基础。该项目还将支持一个由不同背景的科学家组成的团队的研究工作。

The goals of this project are (1) to better understand secondary organic aerosol (SOA) formation by investigating partitioning and heterogeneous chemistry in SOA, and (2) to develop a model for predicting SOA formation that includes gas phase kinetics, partitioning, and the effects of heterogeneous chemistry in acidic SOA. Experiments will be carried out in chambers and the gas phase species and products will be analyzed with a wide variety of chemical and physical techniques. Data will be obtained on SOA formation from various precursor gases, including effects of relative humidity, temperature, and aerosol seed composition. An initial model of heterogeneous SOA formation will be developed for medium and strongly acidic aerosols; it will then be extrapolated to weakly acidic or neutral conditions, which more realistically reflect the conditions of ambient air. This project will lead to insights into sources of global SOA that are not explained by conventional partitioning theory. Undergraduates and graduate students will participate in this project and learn about experimental techniques and modeling. This training will help them establish a strong foundation for successful careers in atmospheric environmental chemistry. The project will also support the research efforts of a team of scientists with diverse backgrounds.