AGS-PRF: Laboratory Studies of the Heterogeneous Oxidation of Organic Compounds Found in Biomass Burning Aerosols by Hydroxyl Radicals

AGS-PRF：生物质燃烧气溶胶中有机化合物被羟基自由基多相氧化的实验室研究

• 批准号: 1433264
• 负责人: Nicole Richards
• 金额: $ 8.6万
• 依托单位: Richards Nicole K
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1433264&HistoricalAwards=false
• 关键词: AGS; PRF; Laboratory; Studies; Heterogeneous

Atmospheric aerosols emitted into the air by biomass burning undergo many chemical reactions in the atmosphere as they age. These reactions can significantly change the impacts that these particles have on air quality and climate. The research conducted by this Postdoctoral Fellow will investigate several factors that can influence these reactions for both simple and complex aerosol mixtures.The overarching goal of this research is to increase the understanding of heterogeneous OH oxidation mechanisms on organic aerosols by performing laboratory studies on multi-component mixtures of organics (variety of functional groups, and mixtures) and inorganic components (sulfate and nitrate), that more closely mimic the compositional complexity of BBA in the atmosphere. This goal will be achieved by four objectives: (1) Determine the effect multi-functional organic groups have on OH heterogeneous uptake kinetics and oxidation products; (2) Examine whether heterogeneous oxidation of single component organic aerosol systems are different than in mixtures; (3) Determine the effect relative humidity has on single organic systems and mixed inorganic-organic mixtures on heterogeneous reaction mechanisms; and (4) Integrate the data to assess what complexities in model BBA systems have the greatest impact on heterogeneous oxidation mechanisms. The results of this effort will provide useful information to climate modelers in estimating the impact of aerosols on climate change.

由生物质燃烧排放到空气中的大气气溶胶在老化过程中会在大气中发生许多化学反应。这些反应可以显著改变这些颗粒对空气质量和气候的影响。该博士后研究员的研究将调查影响简单和复杂气溶胶混合物这些反应的几个因素。本研究的总体目标是通过对有机组分（各种官能团和混合物）和无机组分（硫酸盐和硝酸盐）的多组分混合物进行实验室研究，更接近地模拟大气中BBA的组成复杂性，从而增加对有机气溶胶中多相OH氧化机制的理解。这一目标将通过四个目标来实现：(1)确定多功能有机基团对OH非均相摄取动力学和氧化产物的影响；(2)检查单组分有机气溶胶系统的非均相氧化是否与混合物不同；(3)确定相对湿度对单一有机体系和无机-有机混合体系非均相反应机理的影响；(4)整合数据，评估模型BBA系统中哪些复杂性对非均相氧化机制影响最大。这项工作的结果将为气候建模者估计气溶胶对气候变化的影响提供有用的信息。