Sulfur and Oxygen Isotopic Signatures for Sulfur Dioxide Oxidation Mechanisms

二氧化硫氧化机制的硫和氧同位素特征

• 批准号: 0111714
• 负责人: Mark Thiemens
• 金额: $ 30万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-01 至 2005-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0111714&HistoricalAwards=false
• 关键词: Sulfur; Oxygen; Isotopic; Signatures; Dioxide

Laboratory measurements will be carried out addressing isotope effects in reactions relevant to atmospheric processes, including gas and solution phase oxidation of SO2 (sulfur dioxide), surface catalyzed oxidation of sulfur compounds, and the oxidation of sulfur compounds with NO2 (nitrogen dioxide) and NO3 (nitrate radical). The laboratory studies are needed to better understand isotopic analysis (sulfur and oxygen) that the PI and his group have carried out on atmospheric sulfate and nitrate aerosol samples. The PI is using isotopic data to quantify the relative contributions of the different atmospheric sulfur oxidation pathways. This is of fundamental importance to understanding the chemistry of aerosols and their impact on climate.

将在实验室测量与大气过程有关的反应中的同位素效应，包括二氧化硫(二氧化硫)的气相和溶液相氧化、硫化物的表面催化氧化以及硫化物与二氧化氮(二氧化氮)和硝酸根(硝酸根)的氧化。为了更好地了解PI及其小组对大气硫酸盐和硝酸盐气溶胶样品进行的同位素分析(硫和氧)，需要进行实验室研究。PI正在使用同位素数据来量化不同大气硫氧化途径的相对贡献。这对于了解气溶胶的化学组成及其对气候的影响至关重要。