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首页> 外文期刊>Environmental Science & Technology >PM_(1.0)-Nitrite Heterogeneous Formation Demonstrated via a Modified Versatile Aerosol Concentration Enrichment System Coupled with Ion Chromatography
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PM_(1.0)-Nitrite Heterogeneous Formation Demonstrated via a Modified Versatile Aerosol Concentration Enrichment System Coupled with Ion Chromatography

机译：PM_（1.0） - 核itrite非均相形成通过改性的通用气溶胶浓缩富集系统与离子色谱相连

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摘要

Particulate nitrite is a critical source of hydroxyl radicals; however, it lacks high-resolution methods due to its low abundance and stability to explore its formation mechanism. In this study, a modified versatile aerosol concentration enrichment system (VACES) coupled with ion chromatography (IC) was used to measure particulate NO_2~- hourly online and achieve a lowered detection limit of 10~(-3) μg m~(-3). VACES-IC was used to observe a high- and low-concentration events of PM_(1.0)~-NO_2~- in Shanghai, corresponding to the ambient-level concentrations of 0.34 and 0.05 μg m~(-3), respectively. The morning peak concentrations of NO_2~- even exceeded 3σ (standard deviation) in the high-concentration event due to the reduction of NO_2 by aerosol SO_3~(2-) based on kinetics and regression analysis. This implies that controlling SO_2 emissions would be an effective strategy to decrease morning NO_2~- concentrations, correspondingly reducing the kinetic formation of SO_4~(2-) by 20.8-34.8%. However, after sunrise, NO_2~- formation was primarily attributed to NO_2 hydrolysis at pH 4.97-6.14. In the low-concentration event, NO_2 hydrolysis also accounted for an overwhelming proportion (~90%) of NO_2~- formation. This work estimates the contribution of different paths to particulate NO_2~- formation based on newly established high-resolution measurements.
机译：颗粒状亚硝酸盐是羟基自由基的临界来源;然而，由于其探索其形成机制的低丰度和稳定性，它缺乏高分辨率方法。在本研究中，使用与离子色谱（IC）偶联的改性通用气溶胶浓缩富集系统（Vaces）用于测量颗粒NO_2〜 - 每小时在线并达到10〜（-3）μgm〜（-3 ）。 Vaces-IC用于观察PM_（1.0）〜-NO_2〜 - - 在上海的高浓度和低浓度事件，分别对应于0.34和0.05μgm〜（3）的环境级浓度。由于气溶胶SO_3〜（2-）基于动力学和回归分析，NO_2〜 - - 甚至超过3σ（标准偏差）在高浓度事件中的峰值浓度在高浓度事件中。这意味着控制SO_2排放将是减少早晨NO_2〜 - 浓度的有效策略，相应地将SO_4〜（2-）的动力学形成减少20.8-34.8％。然而，在日出之后，NO_2〜 - 形成主要归因于pH 4.97-6.14的NO_2水解。在低浓度事件中，NO_2水解也占NO_2〜 - 形成的压倒性比例（〜90％）。这项工作估计了基于新建立的高分辨率测量的不同路径对微粒NO_2〜形成的贡献。

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  • 来源
    《Environmental Science & Technology》 |2021年第14期|9794-9804|共11页
  • 作者

    Xiaona Shang; Huihui Kang; Yunqian Chen; Munira Abdumutallip; Ling Li; Xiang Li; Hongbo Fu; Xiaofei Wang; Lin Wang; Xinke Wang; Huiling Ouyang; Xu Tang; Hang Xiao; Christian George; Jianmin Chen;

  • 作者单位

    Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP~3) Department of Environmental Science & Engineering Fudan University Shanghai 200438 China;

    Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP~3) Department of Environmental Science & Engineering Fudan University Shanghai 200438 China;

    Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP~3) Department of Environmental Science & Engineering Fudan University Shanghai 200438 China;

    Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP~3) Department of Environmental Science & Engineering Fudan University Shanghai 200438 China;

    Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP~3) Department of Environmental Science & Engineering Fudan University Shanghai 200438 China;

    Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP~3) Department of Environmental Science & Engineering Fudan University Shanghai 200438 China;

    Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP~3) Department of Environmental Science & Engineering Fudan University Shanghai 200438 China;

    Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP~3) Department of Environmental Science & Engineering Fudan University Shanghai 200438 China;

    Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP~3) Department of Environmental Science & Engineering Fudan University Shanghai 200438 China;

    University Lyon Universite Claude Bernard Lyon 1 CNRS IRCELYON F-69626 Villeurbanne France;

    IRDR International Center of Excellence on Risk Interconnectivity and Governance on Weather/Climate Extremes Impact and Public Health Institute of Atmospheric Sciences Fudan University Shanghai 200438 China;

    IRDR International Center of Excellence on Risk Interconnectivity and Governance on Weather/Climate Extremes Impact and Public Health Institute of Atmospheric Sciences Fudan University Shanghai 200438 China;

    Center for Excellence in Regional Atmospheric Environment Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China;

    Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP~3) Department of Environmental Science & Engineering Fudan University Shanghai 200438 China University Lyon Universite Claude Bernard Lyon 1 CNRS IRCELYON F-69626 Villeurbanne France;

    Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP~3) Department of Environmental Science & Engineering Fudan University Shanghai 200438 China Center for Excellence in Regional Atmospheric Environment Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China IRDR International Center of Excellence on Risk Interconnectivity and Governance on Weather/Climate Extremes Impact and Public Health Institute of Atmospheric Sciences Fudan University Shanghai 200438 China;

  • 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
  • 关键词

    VACES-IC; particulate nitrite; multilinear regression; diurnal contribution; heterogeneous formation;

    机译：vaces-ic;颗粒状亚硝酸盐;多线性回归;昼夜贡献;异质形成;

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