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

AGS-PRF 颗粒粘度对异戊二烯衍生环氧化物反应摄取到亚微米气溶胶的影响

• 批准号: 1524731
• 负责人: Yue Zhang
• 金额: $ 8.6万
• 依托单位: Zhang Yue
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-06-01 至 2018-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1524731&HistoricalAwards=false
• 关键词: AGS; PRF; Effect; Particle; Viscosity

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.

本项目资助一名博士后研究人员在环境室中研究小颗粒的形成和生长。人们对挥发性植物排放物如异戊二烯在大气中形成小颗粒非常感兴趣。实验室的测量将有助于量化这些气相物质在大气中形成气溶胶团块的概率。了解异戊二烯形成二次有机气溶胶（SOAs）的关键方法是研究环氧化物在气溶胶颗粒上的吸收动力学，如二羟基环氧化物（IEPOX）和甲基丙烯酸环氧化物（MAE）。室内研究将在不同的相对湿度（RH）值下进行，以探索粘度对反应性吸收的影响。本研究还将通过质谱技术定性和定量地研究颗粒化学成分作为粘度函数的演变。这项研究获得的结果将改进气候研究、空气质量评估、流行病学和其他可能影响与气候变化和公共卫生有关的公共政策的环境卫生领域所使用的模型。

项目成果

Kinetically controlled glass transition measurement of organic aerosol thin films using broadband dielectric spectroscopy

• DOI: 10.5194/amt-11-3479-2018
• 发表时间: 2018-06
• 期刊: Atmospheric Measurement Techniques
• 影响因子: 3.8
• 作者: Yue Zhang;Shachi Katira;Andrew L. Lee;A. Lambe;T. Onasch;Wen Xu;W. Brooks;M. Canagaratna;A. Freedman;J. Jayne;D. Worsnop;P. Davidovits;D. Chandler;C. Kolb

Effect of the Aerosol-Phase State on Secondary Organic Aerosol Formation from the Reactive Uptake of Isoprene-Derived Epoxydiols (IEPOX)

气溶胶相状态对异戊二烯衍生环氧二醇 (IEPOX) 反应吸收形成的二次有机气溶胶的影响

• DOI: 10.1021/acs.estlett.8b00044
• 发表时间: 2018
• 期刊: Environmental Science & Technology Letters
• 影响因子: 10.9
• 作者: Zhang, Yue;Chen, Yuzhi;Lambe, Andrew T.;Olson, Nicole E.;Lei, Ziying;Craig, Rebecca L.;Zhang, Zhenfa;Gold, Avram;Onasch, Timothy B.;Jayne, John T.
• 通讯作者: Jayne, John T.