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RUI: Assessing Mechanisms for Organosulfate Formation in Secondary Organic Aerosol

RUI：二次有机气溶胶中有机硫酸盐形成的评估机制

基本信息

批准号：
1841019
负责人：
Matthew Elrod
金额：
$ 39.47万
依托单位：
Oberlin College
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-04-01 至 2024-03-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1841019&HistoricalAwards=false
关键词：
RUI Assessing Mechanisms Organosulfate Formation

项目摘要

A major goal of this project is to contribute to improving atmospheric chemical models that are critical to the mechanistic understanding of the processes that are relevant to air pollution and climate change. This effort focuses on studying the production of secondary organic aerosol (SOA) related to the presence of organosulfates in the atmosphere. This Research in Undergraduate Institutions (RUI) project will support the education and training of undergraduate students and help prepare them for future careers in science.The specific objectives of this research are to: (1) measure acid-catalyzed sulfate esterification rate constants for alcohol derivatives of targeted volatile organic compounds (VOCs); (2) investigate mechanistic details of the nucleophilic substitution of nitrate by sulfate reaction for nitrate derivatives of targeted VOCs; (3) investigate mechanistic details of sulfate radical addition to targeted olefinic VOCs reactions and identify sulfate radical formation mechanisms for aerosol proxy solutions irradiated by simulated solar irradiation; and (4) synthesize and characterize with Nuclear Magnetic Resonance (NMR) spectroscopy, organonitrate reactants and potential organosulfate products relevant to the reactions studied.This research will enable parameterization of the important mechanistic aspects of the various processes studied and allow for the determination of their potential importance under ambient atmosphere conditions. The results will lead to more accurate modeling of organosulfate formation in SOA.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.

该项目的一个主要目标是帮助改进大气化学模型，这些模型对于从机理上理解与空气污染和气候变化有关的过程至关重要。这项工作的重点是研究与大气中有机硫酸盐的存在有关的二次有机气溶胶（SOA）的产生。本研究的目的是：（1）测定目标挥发性有机化合物（VOCs）的醇衍生物在酸催化下的硫酸酯化反应速率常数;（2）研究目标VOCs的硝酸酯衍生物通过硫酸酯反应亲核取代硝酸酯的机理细节;（三）研究硫酸根加成到目标烯烃VOCs反应的机理细节，并确定模拟太阳辐射下气溶胶代用品溶液的硫酸根形成机理辐射;和（4）合成和表征核磁共振（NMR）光谱，有机硝酸酯反应物和潜在的有机硫酸酯产品相关的反应studied.This研究将使参数化的重要机制方面的各种研究过程，并允许在环境大气条件下的潜在重要性的确定。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。