| 项目编号: | 1702488
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| 项目名称: | A Laboratory Study to Investigate Inorganic and Organic Sulfate Formation in Multiphase Processes Involving Mineral Dust and Other Metal-Containing Aerosols |
| 作者: | Vicki Grassian
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| 承担单位: | University of California-San Diego
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| 批准年: | 2017
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| 开始日期: | 2017-07-01
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| 结束日期: | 2020-06-30
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| 资助金额: | 482391
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Geosciences - Atmospheric and Geospace Sciences
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| 英文关键词: | sulfate formation
; laboratory study
; mineral
; dust inclusion
; multiphase pathway
; important organic species
; anthropogenic metal-containing dust
; organic compound
; mineral dust
; proposed study
; sulfate process
; other metal-containing aerosol
|
| 英文摘要: | This project focuses on laboratory studies to better understand particulate sulfate formation from sulfur dioxide oxidation in the atmosphere. A major focus of the proposed studies will be to quantify rates and extent of sulfate formation in multiphase pathways involving mineral dust and other metal-containing aerosols as a function of pH, temperature and light.
The mechanisms for sulfate formation that will be investigated in a series of laboratory studies that include the: (1) catalytic effects of transition metal ions present in mineral and anthropogenic metal-containing dusts; (2) enhanced sulfate formation in the presence of photoactive semiconductor oxides; and (3) role of organic compounds in mineral mediated sulfate processes. In addition, new methods to investigate the chemistry within individual cloud droplets will be developed, including an optical tweezer with cavity enhanced Raman spectroscopy to investigate sulfur oxidation chemistry within micron sized single droplets containing a dust inclusion. The experiments will be done in the presence and absence of atmospherically important organic species that can react to yield organosulfates. This project will also assess the importance of surface reactivity versus bulk reactivity, important for modeling cloud processes. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/89766
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| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
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| Recommended Citation: | |
Vicki Grassian. A Laboratory Study to Investigate Inorganic and Organic Sulfate Formation in Multiphase Processes Involving Mineral Dust and Other Metal-Containing Aerosols. 2017-01-01.
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