| 项目编号: | 1455588
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| 项目名称: | The Role of Peroxy Radicals: Linking Gas-Phase Oxidation Chemistry to Secondary Organic Aerosol Formation |
| 作者: | Nga Lee Ng
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| 承担单位: | Georgia Tech Research Corporation
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| 批准年: | 2014
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| 开始日期: | 2015-04-15
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| 结束日期: | 2018-03-31
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| 资助金额: | USD238782
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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: | soa formation
; gas-phase compound
; peroxy radical
; aerosol-phase composition
; secondary organic aerosol
; different peroxy radical reaction pathway
; aerosol volatility
; photochemical oxidation
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| 英文摘要: | This work focuses on improving the fundamental understanding of processes that contribute to the formation of secondary organic aerosol (SOA - very small particles formed from gas-phase compounds) in the atmosphere. A series of laboratory chamber experiments is being conducted to evaluate the atmospheric conditions and concentrations of various chemical species that lead to SOA formation. The results of this research will lead to improved models for predicting SOA formation.
The objectives of this research are: (1) To experimentally map out the effects of the different reaction channels of peroxy radicals on SOA yields, gas- and aerosol-phase composition from photochemical oxidations of biogenic and anthropogenic hydrocarbons, and (2) To determine the effects of different peroxy radical reaction pathways on aerosol volatility. The proposed work focuses on oxidation by OH radicals under dry conditions (relative humidity < 1%). Ammonium sulfate is being used as seeds for aerosol growth and hydrogen peroxide (H2O2), nitrous acid (HONO), or methyl nitrite (CH3ONO) is being used as the OH source. This research will also help improve understanding of how nitrogen oxides influence the SOA formation process.
The project includes outreach plans at the Columbia Middle School (a Title 1 school) to work with an Earth Science teacher and middle school students to increase their knowledge and experience in science, technology, engineering, and math (STEM) disciplines. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/94870
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Nga Lee Ng. The Role of Peroxy Radicals: Linking Gas-Phase Oxidation Chemistry to Secondary Organic Aerosol Formation. 2014-01-01.
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