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首页> 外文期刊>Environmental Science & Technology >Light-Absorbing Brown Carbon Aerosol Constituents from Combustion of Indonesian Peat and Biomass
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Light-Absorbing Brown Carbon Aerosol Constituents from Combustion of Indonesian Peat and Biomass

机译：印尼泥炭和生物质燃烧引起的吸光棕碳气溶胶成分

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摘要

Light-absorbing brown carbon (BrC) constituents of organic aerosol (OA) have been shown to significantly absorb ultraviolet (UV) and visible light and thus impact radiative forcing. However, molecular identification of the BrC constituents is still limited. In this study, we characterize BrC constituents at the molecular level in (i) aerosols emitted by combustion of peat, fern/leaf, and charcoal from Indonesia and (ue) ambient aerosols collected in Singapore during the 2015 haze episode. Aerosols were analyzed using ultra performance liquid chromatography instrument interfaced to a diode array detector and electrospray ionization high-resolution quadrupole time-of-flight mass spectrometer operated in the negative ion mode. In the laboratory-generated aerosols, we identified 41 compounds that can potentially absorb near-UV and visible wavelengths, such as oxygenated—conjugated compounds, nitroaromatics, and S-containing compounds. The sum of BrC constituents in peat, fern/leaf, and charcoal burning aerosols are 16%, 35%, and 28% of the OA mass, respectively, giving an average contribution of 24%. On average, the BrC constituents account for 0.4% of the ambient OA mass; however, large uncertainties in mass closure remain because of the lack of authentic standards. This study highlights the potential of light-absorbing BrC OA constituents from peat, fern/leaf, and charcoal burning and their importance in the atmosphere.
机译：已显示有机气溶胶（OA）的吸收光的棕碳（BrC）成分可显着吸收紫外线（UV）和可见光，从而影​​响辐射强迫。但是，BrC成分的分子鉴定仍然受到限制。在这项研究中，我们在（i）印度尼西亚泥炭，蕨类/叶片和木炭燃烧产生的气溶胶和（ue）2015年霾天气期间在新加坡收集的环境气溶胶的分子水平上表征BrC成分。使用连接到二极管阵列检测器的超高效液相色谱仪和以负离子模式运行的电喷雾电离高分辨率四极杆飞行时间质谱仪分析气溶胶。在实验室产生的气溶胶中，我们确定了41种可能吸收近紫外线和可见光波长的化合物，例如氧化共轭化合物，硝基芳族化合物和含S化合物。泥炭，蕨类/叶片和木炭燃烧气溶胶中的BrC成分之和分别为OA质量的16％，35％和28％，平均贡献率为24％。 BrC成分平均占OA环境质量的0.4％；但是，由于缺乏可靠的标准，大规模封存仍存在很大的不确定性。这项研究强调了从泥炭，蕨类/叶片和木炭燃烧中吸收光的BrC OA成分的潜力及其在大气中的重要性。

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  • 来源
    《Environmental Science & Technology》 |2017年第8期|4415-4423|共9页
  • 作者

    Sri Hapsari Budisulistiorini; Matthieu Riva; Michael Williams; Jing Chen; Masayuki Itoh; Jason D. Surratt; Mikinori Kuwata;

  • 作者单位

    Earth Observatory of Singapore, Nanyang Technological University, Singapore 639798, Singapore;

    Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States;

    Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States;

    Earth Observatory of Singapore, Nanyang Technological University, Singapore 639798, Singapore;

    Center for Southeast Asian Studies, Kyoto University, Kyoto 6068501, Japan;

    Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States;

    Earth Observatory of Singapore, Nanyang Technological University, Singapore 639798, Singapore,Center for Southeast Asian Studies, Kyoto University, Kyoto 6068501, Japan;

  • 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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