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首页> 外文期刊>Environmental Science & Technology >Source Apportionment of Elemental Carbon in Beijing, China: Insights from Radiocarbon and Organic Marker Measurements
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Source Apportionment of Elemental Carbon in Beijing, China: Insights from Radiocarbon and Organic Marker Measurements

机译：中国北京的元素碳源分配：放射性碳和有机标记物测量的见解

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摘要

Elemental carbon (EC) or black carbon (BC) in the atmosphere has a strong influence on both climate and human health. In this study, radiocarbon (~(14)C) based source apportionment is used to distinguish between fossil fuel and biomass burning sources of EC isolated from aerosol filter samples collected in Beijing from June 2010 to May 2011. The ~(14)C results demonstrate that EC is consistently dominated by fossil-fuel combustion throughout the whole year with a mean contribution of 79% ± 6% (ranging from 70% to 91%), though EC has a higher mean and peak concentrations in the cold season. The seasonal molecular pattern of hopanes (i.e., a class of organic markers mainly emitted during the combustion of different fossil fuels) indicates that traffic-related emissions are the most important fossil source in the warm period and coal combustion emissions are significantly increased in the cold season. By combining ~(14)C based source apportionment results and picene (i.e., an organic marker for coal emissions) concentrations, relative contributions from coal (mainly from residential bituminous coal) and vehicle to EC in the cold period were estimated as 25 ± 4% and 50 ± 7%, respectively, whereas the coal combustion contribution was negligible or very small in the warm period.
机译：大气中的元素碳（EC）或黑碳（BC）对气候和人类健康都有强烈影响。在这项研究中，基于放射性碳（〜（14）C）的源分配用于区分2010年6月至2011年5月在北京采集的气溶胶过滤器样品中分离出的EC的化石燃料和生物质燃烧源。〜（14）C结果研究表明，尽管EC在寒冷季节具有较高的平均浓度和峰值浓度，但全年EC始终以化石燃料燃烧为主，平均贡献为79％±6％（从70％到91％）。 ane烷的季节性分子模式（即主要在燃烧不同化石燃料时排放的一类有机标志物）表明，与交通有关的排放是温暖时期最重要的化石来源，而在寒冷时期煤炭燃烧的排放量显着增加季节。通过结合基于〜（14）C的源分配结果和picene（即煤排放的有机标志物）浓度，在寒冷时期，煤（主要来自居民烟煤）和车辆对EC的相对贡献估计为25±4 ％和50±7％，而煤燃烧的贡献可以忽略不计或在温暖时期很小。

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  • 来源
    《Environmental Science & Technology》 |2015年第14期|8408-8415|共8页
  • 作者

    Yan-Lin Zhang; Juergen Schnelle-Kreis; Guelcin Abbaszade; Ralf Zimmermann; Peter Zotter; Rong-rong Shen; Klaus Schaefer; Longyi Shao; Andre S.H. Prevot; Soenke Szidat;

  • 作者单位

    Department of Chemistry and Biochemistry & Oeschger Centre for Climate Change Research, University of Bern, 3012 Berne, Switzerland,Paul Scherrer Institute (PSI), 5232 Villigen-PSI, Switzerland,Yale-NUIST Center on Atmospheric Environment, Nanjing University of Information Science and Technology, Nanjing 210044, China;

    Joint Mass Spectrometry Center, Cooperation Group Comprehensive Molecular Analytics, Helmholtz Zentrum Muenchen, 85764 Neuherberg, Germany;

    Joint Mass Spectrometry Center, Cooperation Group Comprehensive Molecular Analytics, Helmholtz Zentrum Muenchen, 85764 Neuherberg, Germany;

    Joint Mass Spectrometry Center, Cooperation Group Comprehensive Molecular Analytics, Helmholtz Zentrum Muenchen, 85764 Neuherberg, Germany,Joint Mass Spectrometry Centre, Analytical Chemistry, Institute of Chemistry University of Rostock, 18059 Rostock, Germany;

    Paul Scherrer Institute (PSI), 5232 Villigen-PSI, Switzerland,Lucerne School of Engineering and Architecture, Bioenergy Research, Lucerne University of Applied Sciences and Arts, 6048 Horw, Switzerland;

    Institute of Meteorology and Climate Research (IMK-IFU), Karlsruhe Institute of Technology (KIT), 82467 Garmisch-Partenkirchen, Germany;

    Institute of Meteorology and Climate Research (IMK-IFU), Karlsruhe Institute of Technology (KIT), 82467 Garmisch-Partenkirchen, Germany;

    State Key Laboratory of Coal Resources and Safe Mining, School of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China;

    Paul Scherrer Institute (PSI), 5232 Villigen-PSI, Switzerland;

    Department of Chemistry and Biochemistry & Oeschger Centre for Climate Change Research, University of Bern, 3012 Berne, Switzerland;

  • 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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