Photochemistry of Secondary Organic Aerosol

二次有机气溶胶的光化学

基本信息

  • 批准号:
    0831518
  • 负责人:
  • 金额:
    $ 44.78万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2008
  • 资助国家:
    美国
  • 起止时间:
    2008-09-01 至 2012-08-31
  • 项目状态:
    已结题

项目摘要

The focus of this project is on providing a molecular level understanding of photochemical reactions occurring inside secondary organic aerosol (SOA) particles. SOA contributes to both direct and indirect radiative forcing of climate, and affects air quality in the urban and remote atmosphere. The primary goal of this research is to understand the photochemical processing of SOA derived from the oxidation of isoprene and selected monoterpenes by ozone or the nitrate radical (NO3). To achieve this goal, model SOA will be prepared and the absorption spectra and photodissociation spectra of the resulting SOA material will be investigated using the method of aerosol photodissociation spectroscopy. In parallel, the composition of model terpene SOA will be analyzed in detail using ultrahigh-resolution mass spectrometry before and after the SOA is exposed to simulated solar radiation. In addition, absolute quantum yields for photolysis of several model carbonyls embedded in SOA-like materials will be measured. This information will be used to estimate rates of photochemical reactions occurring inside atmospheric SOA particles.The interaction between solar radiation and organic materials is directly relevant to several areas of research, including the photodegradation of organic polymers and coatings, photochemistry of soil organics and dissolved organic matter, organic photochemistry, and water purification. This research will also provide information useful for predicting the health effects of aged organic particulate matter. Two graduate students will be supported through this award.
该项目的重点是提供二级有机气溶胶(SOA)颗粒内部发生的光化学反应的分子水平的理解。SOA对气候的直接和间接辐射强迫都有贡献,并影响城市和偏远大气中的空气质量。本研究的主要目的是了解臭氧或硝酸根(NO3)氧化异戊二烯和选定的单萜烯产生的SOA光化学处理过程。为了实现这一目标,将制备SOA模型,并使用气溶胶光解光谱方法研究所得SOA材料的吸收光谱和光解光谱。同时,将使用超高分辨率质谱法详细分析模型萜烯SOA暴露于模拟太阳辐射前后的组成。此外,还将测量嵌入类soa材料中的几种模型羰基光解的绝对量子产率。这一信息将用于估计大气中SOA粒子内发生的光化学反应速率。太阳辐射与有机物质之间的相互作用直接关系到几个研究领域,包括有机聚合物和涂层的光降解,土壤有机物和溶解有机物的光化学,有机光化学和水净化。该研究还将为预测老化有机颗粒物对健康的影响提供有用的信息。两名研究生将通过该奖项获得资助。

项目成果

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Sergey Nizkorodov其他文献

Sergey Nizkorodov的其他文献

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{{ truncateString('Sergey Nizkorodov', 18)}}的其他基金

Effect of Condensed-Phase Photochemistry on Absorption Coefficients and Phase State of Atmospheric Organic Aerosol Particles
凝聚相光化学对大气有机气溶胶颗粒吸收系数和相态的影响
  • 批准号:
    2334731
  • 财政年份:
    2024
  • 资助金额:
    $ 44.78万
  • 项目类别:
    Standard Grant
Molecular-level Understanding Of Atmospheric Aerosols (MUOAA 2024); Corsica, France; April 1-5, 2024
对大气气溶胶的分子水平理解(MUOAA 2024);
  • 批准号:
    2332007
  • 财政年份:
    2024
  • 资助金额:
    $ 44.78万
  • 项目类别:
    Standard Grant
Chemistry of Atmospheric Aerosols at Pacifichem 2020 Congress; Honolulu, Hawaii; December 15-20, 2020
Pacifichem 2020 大会上的大气气溶胶化学;
  • 批准号:
    1936123
  • 财政年份:
    2020
  • 资助金额:
    $ 44.78万
  • 项目类别:
    Standard Grant
REU Site: Chemistry Summer Undergraduate Research Fellowship (Chem-SURF) Program at UCI
REU 网站:UCI 化学暑期本科生研究奖学金 (Chem-SURF) 项目
  • 批准号:
    1950126
  • 财政年份:
    2020
  • 资助金额:
    $ 44.78万
  • 项目类别:
    Standard Grant
Condensed-Phase Organic Photochemistry in Aerosol Particles and in Aerosol Liquid Water
气溶胶颗粒和气溶胶液态水中的凝聚相有机光化学
  • 批准号:
    1853639
  • 财政年份:
    2019
  • 资助金额:
    $ 44.78万
  • 项目类别:
    Standard Grant
Collaborative Research: ICARUS - Index of Chamber Atmospheric Research in the United States
合作研究:ICARUS - 美国室内大气研究索引
  • 批准号:
    1740640
  • 财政年份:
    2017
  • 资助金额:
    $ 44.78万
  • 项目类别:
    Standard Grant
Chemistry of Atmospheric Aerosols at Pacifichem 2015 Congress Conference in Honolulu, Hawaii; December 15-20, 2015
夏威夷檀香山 Pacifichem 2015 年大会上的大气气溶胶化学;
  • 批准号:
    1519142
  • 财政年份:
    2015
  • 资助金额:
    $ 44.78万
  • 项目类别:
    Standard Grant
Photochemistry in Organic Aerosols
有机气溶胶中的光化学
  • 批准号:
    1227579
  • 财政年份:
    2012
  • 资助金额:
    $ 44.78万
  • 项目类别:
    Standard Grant
MRI: Acquisition of Two High-Resolution Mass Spectrometers for Gas and Particle Measurements in Collaborative Laboratory Research and Field Studies
MRI:购买两台高分辨率质谱仪,用于实验室协作研究和现场研究中的气体和粒子测量
  • 批准号:
    0923323
  • 财政年份:
    2009
  • 资助金额:
    $ 44.78万
  • 项目类别:
    Standard Grant
Photochemistry at Organic Particle-Air Interfaces
有机颗粒-空气界面的光化学
  • 批准号:
    0509248
  • 财政年份:
    2005
  • 资助金额:
    $ 44.78万
  • 项目类别:
    Continuing Grant

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农业残余物露天燃烧释放的二次有机气溶胶前体的排放因子估算。
  • 批准号:
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相态对二次有机气溶胶分配的总体影响
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    2246502
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    2023
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Exploring the Toxicity of Secondary Organic Aerosol formed from Atmospheric Oxidation of Pesticides
探讨农药大气氧化形成的二次有机气溶胶的毒性
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