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Surface components of PM2.5 during clear and hazy days in Shanghai by ToF-SIMS

机译：ToF-SIMS在上海晴天和朦胧天气中PM2.5的表面成分

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摘要

The compositions of atmospheric particles change greatly on hazy days and could threaten human health. In this study, fine mode particles (PM2.5) were collected and divided according to hazy and non hazy days in Shanghai from December 8th, 2015 to January 12th, 2016. Versatile ToF-SIMS was performed on the samples to reveal chemical information from the surface of PM2.5. Normalized intensities of Na, Mn, K, V, Al, Fe, Ca, Ti, Cl, NOx, and ammonia were higher on clear days while peak intensities of detected bromine and sulfur-contained species were much higher on hazy days. Some hazardous species (Pb, Cr, Ni, As, CHS, SO2) and high-mass aromatic hydrocarbon fractions could only be detected by ToF-SIMS from PM2.5 collected on hazy days. Comparison of metallic elements and phthalates implied that haze pollution in Shanghai was mainly the mixing of coal combustion with vehicle emission. In addition, comparison of different haze pollution was also exhibited. Some nitrogen-containing organic compounds were detected only from PM2.5 of December 15th, and ToF-SIMS ion signals of N2H5+ NH4+, CN-, NO2- and NO3- from PM2.5 of December 15th were much more intense, compared with PM2.5 collected on December 25th. (C) 2016 Elsevier Ltd. All rights reserved.
机译：在朦胧的日子里，大气颗粒的成分会发生很大变化，并可能威胁人类健康。在本研究中，收集了2015年12月8日至2016年1月12日上海细模式颗粒（PM2.5）并根据朦胧天和非朦胧天进行了划分。对样品进行了多功能ToF-SIMS揭示了来自PM2.5的表面。在晴天，Na，Mn，K，V，Al，Fe，Ca，Ti，Cl，NOx和氨的归一化强度较高，而在朦胧的日子中，检测到的溴和含硫物质的峰值强度则高得多。 ToF-SIMS只能从朦胧的日子里收集的PM2.5中检测到某些有害物质（Pb，Cr，Ni，As，CHS，SO2）和高质量的芳香烃馏分。金属元素和邻苯二甲酸盐的比较表明，上海的雾霾污染主要是煤炭燃烧与车辆排放的混合。此外，还展示了不同雾度污染的比较。仅从12月15日的PM2.5中检测到一些含氮有机化合物，与12月15日的PM2.5相比，ToF-SIMS离子信号N2H5 + NH4 +，CN-，NO2-和NO3-的强度更高。 .5在12月25日收集。 （C）2016 Elsevier Ltd.保留所有权利。

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  • 来源
    《Atmospheric environment》 |2017年第1期|175-181|共7页
  • 作者

    Huang Di; Xiu Guangli; Li Meng; Hua Xin; Long Yitao;

  • 作者单位

    East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;

    East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;

    East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;

    East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;

    East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China|East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Haze pollution; PM2.5; ToF-SIMS; Surface analysis;

    机译：霾污染;PM2.5;ToF-SIMS;表面分析;

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