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α-蒎烯臭氧氧化反应中二次有机气溶胶理化特性与云凝结核活性

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李时政, 马嫣, 郑军, 姚磊, 周瑶瑶, 王振. α-蒎烯臭氧氧化反应中二次有机气溶胶理化特性与云凝结核活性[J]. 环境化学, 2015, 34(9): 1633-1641. doi: 10.7524/j.issn.0254-6108.2015.09.2015021002
引用本文: 李时政, 马嫣, 郑军, 姚磊, 周瑶瑶, 王振. α-蒎烯臭氧氧化反应中二次有机气溶胶理化特性与云凝结核活性[J]. 环境化学, 2015, 34(9): 1633-1641. doi: 10.7524/j.issn.0254-6108.2015.09.2015021002
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LI Shizheng, MA Yan, ZHENG Jun, YAO Lei, ZHOU Yaoyao, WANG Zhen. Physicochemical properties and cloud nucleating abilities of secondary organic aerosol from α-pinene ozonolysis[J]. Environmental Chemistry, 2015, 34(9): 1633-1641. doi: 10.7524/j.issn.0254-6108.2015.09.2015021002
Citation: LI Shizheng, MA Yan, ZHENG Jun, YAO Lei, ZHOU Yaoyao, WANG Zhen. Physicochemical properties and cloud nucleating abilities of secondary organic aerosol from α-pinene ozonolysis[J]. Environmental Chemistry, 2015, 34(9): 1633-1641. doi: 10.7524/j.issn.0254-6108.2015.09.2015021002
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α-蒎烯臭氧氧化反应中二次有机气溶胶理化特性与云凝结核活性

  • 1.

    南京信息工程大学环境科学与工程学院;江苏省大气环境监测与污染控制高技术研究重点实验室, 南京, 210044

  • 基金项目:

    国家自然科学基金(21377059,41275142)

    江苏省自然科学基金(BK2012861)

    江苏省六大人才高峰项目(JNHB-006)资助.

Physicochemical properties and cloud nucleating abilities of secondary organic aerosol from α-pinene ozonolysis

  • 1.

    School of Environmental Science and Engineering, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing University of Information Science & Technology, Nanjing, 210044, China

  • Fund Project:

  • 摘要: 采用环境烟雾箱模拟实验,在近大气条件下研究了α-蒎烯气相臭氧氧化反应.通过气体与气溶胶膜采样进样口FIGAERO(Filter Inlet for Gas and AEROsols)与高分辨率飞行时间化学电离质谱(HRToF-CIMS)联用对颗粒相产物进行了鉴别,鉴别结果表明,颗粒相产物中浓度最高的是蒎酮醛,其它主要产物包括蒎酮酸、蒎醛酸、降蒎酮酸、降蒎醛酸和蒎酸.采用扫描电迁移率粒径谱仪(SMPS)、气溶胶质量分析仪(APM)与云凝结核计数器(CCNC)联用考察了臭氧氧化反应生成的二次有机气溶胶(SOA)的粒径谱分布、密度、产率以及云凝结核活性发现,随着臭氧氧化反应的进行,SOA的密度、质量浓度以及云凝结核活性均呈上升趋势.同时研究了重要的大气物种SO2对α-蒎烯臭氧氧化反应的影响,实验结果表明,SO2能大大促进气溶胶成核,气溶胶数浓度、质量浓度和产率均提高,同时云凝结核活性也显著增强,其可能的机制是反应中稳定化的Criegee中间体与SO2反应生成硫酸.
    Abstract: Gas-phase ozonolysis of α-pinene was studied in smog chamber experiments under near atmospheric conditions. Particle phase products were identified using Filter Inlet for Gas and AEROsols (FIGAERO) coupled to High-resolution Time of Flight Chemical Ionization Mass Spectrometry (HRToF-CIMS). SOA size distribution, density, mass yield and CCN activity were monitored by a combination of Scanning Mobility Particle Sizer (SMPS), Aerosol Particle Analyzer (APM) and Cloud Condensation Nuclei Counter (CCNC). Furthermore, the effect of atmospherically important SO2 on the ozonolysis system was investigated.
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  • 收稿日期:  2015-02-10
  • 刊出日期:  2015-09-15

α-蒎烯臭氧氧化反应中二次有机气溶胶理化特性与云凝结核活性

  • 1. 南京信息工程大学环境科学与工程学院;江苏省大气环境监测与污染控制高技术研究重点实验室, 南京, 210044
  • 收稿日期:  2015-02-10
基金项目:

国家自然科学基金(21377059,41275142)

江苏省自然科学基金(BK2012861)

江苏省六大人才高峰项目(JNHB-006)资助.

摘要: 采用环境烟雾箱模拟实验,在近大气条件下研究了α-蒎烯气相臭氧氧化反应.通过气体与气溶胶膜采样进样口FIGAERO(Filter Inlet for Gas and AEROsols)与高分辨率飞行时间化学电离质谱(HRToF-CIMS)联用对颗粒相产物进行了鉴别,鉴别结果表明,颗粒相产物中浓度最高的是蒎酮醛,其它主要产物包括蒎酮酸、蒎醛酸、降蒎酮酸、降蒎醛酸和蒎酸.采用扫描电迁移率粒径谱仪(SMPS)、气溶胶质量分析仪(APM)与云凝结核计数器(CCNC)联用考察了臭氧氧化反应生成的二次有机气溶胶(SOA)的粒径谱分布、密度、产率以及云凝结核活性发现,随着臭氧氧化反应的进行,SOA的密度、质量浓度以及云凝结核活性均呈上升趋势.同时研究了重要的大气物种SO2对α-蒎烯臭氧氧化反应的影响,实验结果表明,SO2能大大促进气溶胶成核,气溶胶数浓度、质量浓度和产率均提高,同时云凝结核活性也显著增强,其可能的机制是反应中稳定化的Criegee中间体与SO2反应生成硫酸.

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