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首页> 外文期刊>Environmental Science & Technology >Highly Oxidized Multifunctional Organic Compounds Observed in Tropospheric Particles: A Field and Laboratory Study
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Highly Oxidized Multifunctional Organic Compounds Observed in Tropospheric Particles: A Field and Laboratory Study

机译：在对流层颗粒中观察到的高氧化多功能有机化合物：现场和实验室研究

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摘要

Very recent studies have reported the existence of highly oxidized multifunctional organic compounds (HOMs) with O/C ratios greater than 0.7. Because of their low vapor pressure, these compounds are often referred as extremely low-volatile organic compounds (ELVOCs), and thus, they are able to contribute significantly to organic mass in tropospheric particles. While HOMs have been successfully detected in the gas phase, their fate after uptake into particles remains unclear to date. Hence, the present study was designed to detect HOMs and related oxidation products in the particle phase and, thus, to shed light on their fate after phase transfer. To this end, aerosol chamber investigations of α-pinene ozonolysis were conducted under near environmental precursor concentrations (2.4 ppb) in a continuous flow reactor. The chemical characterization shows three classes of particle constituents: (1) intact HOMs that contain a carbonyl group, (2) particle-phase decomposition products, and (3) highly oxidized organosulfates (suggested to be addressed as HOOS). Besides chamber studies, HOM formation was also investigated during a measurement campaign conducted in summer 2013 at the TROPOS research station Melpitz. During this field campaign, gas-phase HOM formation was found to be correlated with an increase in the oxidation state of the organic aerosol.
机译：最近的研究报道了O / C比率大于0.7的高度氧化的多功能有机化合物（HOM）的存在。由于它们的蒸气压低，这些化合物通常被称为极低挥发性有机化合物（ELVOC），因此，它们能够显着促进对流层颗粒中的有机质。尽管已成功在气相中检测出HOM，但迄今为止尚不清楚它们被颗粒吸收后的命运。因此，本研究旨在检测颗粒相中的HOM和相关氧化产物，从而揭示相转移后它们的命运。为此，在连续流动反应器中，在接近环境前体浓度（2.4 ppb）的条件下，进行了α-oz烯臭氧分解的气雾室研究。化学表征显示三类颗粒成分：（1）含有羰基的完整HOM，（2）颗粒相分解产物，以及（3）高氧化度的有机硫酸盐（建议称为HOOS）。除了腔室研究外，还在TROPOS研究站Melpitz于2013年夏季进行的测量活动中对HOM的形成进行了研究。在该野战期间，发现气相HOM的形成与有机气溶胶氧化态的增加有关。

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  • 来源
    《Environmental Science & Technology》 |2015年第13期|7754-7761|共8页
  • 作者

    Anke Mutzel; Laurent Poulain; Torsten Berndt; Yoshiteru Iinuma; Maria Rodigast; Olaf Boege; Stefanie Richters; Gerald Spindler; Mikko Sipilae; Tuija Jokinen; Markku Kulmala; Hartmut Herrmann;

  • 作者单位

    Leibniz Institute for Tropospheric Research (TROPOS), Permoserstrasse 15, D-04318 Leipzig, Germany;

    Leibniz Institute for Tropospheric Research (TROPOS), Permoserstrasse 15, D-04318 Leipzig, Germany;

    Leibniz Institute for Tropospheric Research (TROPOS), Permoserstrasse 15, D-04318 Leipzig, Germany;

    Leibniz Institute for Tropospheric Research (TROPOS), Permoserstrasse 15, D-04318 Leipzig, Germany;

    Leibniz Institute for Tropospheric Research (TROPOS), Permoserstrasse 15, D-04318 Leipzig, Germany;

    Leibniz Institute for Tropospheric Research (TROPOS), Permoserstrasse 15, D-04318 Leipzig, Germany;

    Leibniz Institute for Tropospheric Research (TROPOS), Permoserstrasse 15, D-04318 Leipzig, Germany;

    Leibniz Institute for Tropospheric Research (TROPOS), Permoserstrasse 15, D-04318 Leipzig, Germany;

    Department of Physics, University of Helsinki, Post Office Box 64, 00014 Helsinki, Finland;

    Department of Physics, University of Helsinki, Post Office Box 64, 00014 Helsinki, Finland;

    Department of Physics, University of Helsinki, Post Office Box 64, 00014 Helsinki, Finland;

    Leibniz Institute for Tropospheric Research (TROPOS), Permoserstrasse 15, D-04318 Leipzig, Germany;

  • 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);
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