Secondary Organic Aerosol Production from Volatile Chemical Products

颗粒物与公共卫生和气候等重要社会问题直接相关。该项目将增进对环境颗粒物负担的了解，特别是在城市地区。这项工作将直接支持两名研究生。此外，硕士生和本科生将参与研究，从而为他们在科学，技术，工程和数学（STEM）领域的成功职业生涯做好准备。该项目支持对挥发性化学产品（VCP）的能力进行调查，如杀虫剂，涂料，印刷油墨，粘合剂，清洁剂和个人护理产品，有助于在城市地区的大气中形成小颗粒或二次有机气溶胶（SOA）。选定数量的VCP将在实验室烟雾室中反应，并测量SOA的形成和化学成分。研究结果将用于化学传输模型中，预测美国城市中SOA的形成。研究将解决的两个科学问题是：（1）VCP氧化形成SOA的质量产率和化学组成是什么，产率如何随VCP分子结构而变化？以及（2）VCP SOA对环境SOA负荷和由环境气溶胶质谱仪数据的因子分析确定的含氧有机气溶胶因子的贡献是什么？除了量化来自各种VCP的SOA产量和成分外，科学家们还将开发VCP SOA参数化，以便使用挥发性基组纳入化学传输模型。他们还建议确定VCP氧化和VCP SOA示踪离子形成的高含氧多功能物种，用于在环境数据库中识别SOA。该奖项反映了NSF的法定使命，并被认为值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估来支持。

Particulate matter is directly linked to important societal problems of public health and climate. This project will improve understanding of the ambient particulate matter burden, especially in urban areas. The effort will directly support two graduate students. In addition Master's students and undergraduate students will participate in the research, thus preparing them for successful careers in Science, Technology, Engineering and Math (STEM) fields. This project supports an investigation into the ability of volatile chemical products (VCP), such as pesticides, coatings, printing inks, adhesives, cleaning agents, and personal care products, to contribute to the formation of small particles, or secondary organic aerosol (SOA), in the atmosphere of urban areas. A selected number of VCPs will be reacted in a laboratory smog chamber and the formation and chemical composition of SOA will be measured. The results will be used in chemical transport models to predict the formation of SOA in U.S. cities.The two science questions that will be addressed by the research are: (1) What are the mass yields and chemical composition of SOA formed from oxidation of VCPs, and how do the yields change with VCP molecular structure? and (2) What is the contribution of VCP SOA to the ambient SOA burden and the oxygenated organic aerosol factors determined from factor analysis of ambient aerosol mass spectrometer data? In addition to quantifying SOA yields and compositions from various VCPs, scientists will develop VCP SOA parameterizations ready for incorporating into chemical transport models using the volatility basis set. They also suggest to identify highly oxygenated multifunctional species formed from the VCP oxidation and VCP SOA tracer ions for use in identifying SOA in ambient databases.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.