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Representation of Secondary Organic Aerosol Laboratory Chamber Data for the Interpretation of Mechanisms of Particle Growth

机译：用于解释颗粒生长机理的次要有机气溶胶实验室室数据的表示形式

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摘要

Absorptive models of gas-particle partitioning have been shown to be successful in describing the formation and growth of secondary organic aerosol (SOA).Here the expression for particle growth derived by Odum et al.(Odum,J.R.;Hoffmann,T.;Bowman,F.;Collins,D.;Flagan,R.C.;Seinfeld,J.H.Gas/particle partitioning and secondary organic aerosol yields.Environ.Sci.Technol.1996,30,2580-2585) is extended to facilitate interpretation of SOA growth data measured in the laboratory in terms of the underlying chemistry,even when details of the reactions are not well-constrained.A simple (one-component) expression for aerosol growth (DELTAM) as a function of the amount of hydrocarbon reacted (DELTAHC) is derived,and the effects of changes to three key parameters,stoichiometric yield of condensable species,gas-particle partitioning coefficient,and concentration of preexisting aerosol,are discussed.Two sets of laboratory chamber data on SOA growth are examined in this context:the ozonolysis of a-pinene and the OH-initiated photooxidation of aromatic compounds.Even though these two systems have a number of significant differences,both are described well within this framework.From the shapes of the DELTAM versus DELTAHC curves in each case,the importance of poorly constrained chemistry such as heterogeneous reactions and gas-phase reactions of oxidation products is examined.
机译：气体-颗粒分配的吸收模型已被成功地描述了次生有机气溶胶（SOA）的形成和生长。此处由Odum等人（Odum，JR; Hoffmann，T。; Bowman）得出。 ，F。; Collins，D。; Flagan，RC; Seinfeld，JHGas /颗粒分配和次要有机气溶胶产量。环境科学技术.1996,30,2580-2585）已扩展以促进对测得的SOA生长数据的解释在实验室中就基本化学而言，即使没有很好地限制反应的细节。也可以得出气溶胶生长（DELTAM）随反应的烃量（DELTAHC）变化的简单（单组分）表达式讨论了三个关键参数的变化，可冷凝物质的化学计量产率，气体颗粒分配系数和预先存在的气溶胶浓度的影响。在此背景下，研究了两组关于SOA生长的实验室数据：臭氧的臭氧分解。 pine烯即使这两个系统有许多显着差异，但两者都在此框架内得到了很好的描述。从每种情况下的DELTAM与DELTAHC曲线的形状来看，化学反应受限的重要性检验了氧化产物的异相反应和气相反应。

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  • 来源
    《Environmental Science & Technology》 |2005年第11期|p.4159-4165|共7页
  • 作者

    JESSE H.KROLL; JOHN H.SEINFELD;

  • 作者单位

    Departments of Environmental Science and Engineering and Chemical Engineering,California Institute of Technology,Pasadena,California 91125;

    Departments of Environmental Science and Engineering and Chemical Engineering,California Institute of Technology,Pasadena,California 91125;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境化学;
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