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首页> 外文期刊>Science of the total environment >Concentrations, optical properties and sources of humic-like substances (HULIS) in fine particulate matter in Xi'an, Northwest China
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Concentrations, optical properties and sources of humic-like substances (HULIS) in fine particulate matter in Xi'an, Northwest China

机译：西安西安西安美颗粒物质中腐殖质，光学性质和腐殖质物质（Hulis）

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摘要

Humic-like substances (HULIS) are ubiquitous in the atmospheric environment, which affects both human health and climate. We present here the mass concentration and optical characteristics of HULIS isolated from aerosol samples collected in Xi'an, China. Both mass concentration and absorption coefficient (Abs_(365)) of HULIS show clear seasonal differences, with the highest average in winter (3.91 μgCm~(-3) and 4.78 M m~(-1), respectively) and the lowest in summer (0.65 μgC m~(-3) and 0.55 M m~(-1), respectively). The sources of HULIS_C and light absorption of HULIS were analyzed by positive matrix factorization (PMF) and four major sources were resolved, including secondary formation, biomass burning, coal burning, and vehicle emission. Our results show that secondary formation (i.e., gas-to-particle conversion from e.g., photochemical oxidation) was the major contributor to both HUUS_C (50%) and light absorption (55%) of HULIS in summer, biomass burning and coal burning were major sources of HULIS_C (~70%) and light absorption (~80%) of HULIS in winter. It is worth noting that biomass burning and coal burning had higher contribution to HULIS light absorption (47% in spring, 37% in summer, 73% in fall, and 77% in winter) than their corresponding contribution to HULIS_C concentration (41 % in spring, 37% in summer, 54% in fall, and 69% in winter). However, vehicle emission had lower contribution to HULIS light absorption (26% in spring, 8% in summer, 18% in fall, and 11% in winter) than to HULIS_C concentration (24% in spring, 13% in summer, 28% in fall, and 18% in winter). These results suggest that HULIS from biomass burning and coal burning have higher light absorption ability than from vehicle emission.
机译：腐殖质的物质（Hulis）在大气环境中普遍存在，影响人类健康和气候。我们在这里介绍了从西安西安收集的气溶胶样品中分离的Hulis的质量浓度和光学特性。 Hulis的质量浓度和吸收系数（ABS_（365））显示出透明的季节性差异，冬季最高平均值（3.91μgm〜（-3）和4.78米米〜（-1），夏季最低（分别为0.65μgm〜（-3）和0.55 m〜（-1））。通过阳性基质分子（PMF）分析Hulis_C和光吸收的光源，并解决了四种主要来源，包括二次形成，生物质燃烧，煤炭燃烧和车辆排放。我们的结果表明，二级形成（即，来自例如光化学氧化的气体到颗粒转化）是夏季Huus_C（50％）和光吸收（55％）的主要贡献者，生物量燃烧和煤燃烧Hulis_C的主要来源（〜70％）和冬季霍利斯的光吸收（〜80％）。值得注意的是，生物质燃烧和煤炭燃烧对Hulis光吸收的贡献更高（春季47％，夏季37％，秋季73％，冬季77％）比对Hulis_C浓度的相应贡献（41％春天，夏季37％，秋季54％，冬季69％）。然而，车辆排放对Hulis光吸收的贡献较低（春季26％，夏季8％，下降18％，冬季11％）比霍利斯_C浓度（春季24％，夏季13％，28％，28％，28％秋季，冬季18％）。这些结果表明，来自生物质燃烧和煤的漏洞具有比车辆发射更高的光吸收能力。

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  • 来源
    《Science of the total environment》 |2021年第1期|147902.1-147902.9|共9页
  • 作者

    Wei Yuan; Ru-Jin Huang; Lu Yang; Haiyan Ni; Ting Wang; Wenjuan Cao; Jing Duan; Jie Guo; Huabin Huang; Thorsten Hoffmann;

  • 作者单位

    State Key Laboratory of Loess and Quaternary Geology Center for Excellence in Quaternary Science and Global Change Key Laboratory of Aerosol Chemistry & Physics Institute of Earth Environment Chinese Academy of Sciences Xi'an 710061 China University of Chinese Academy of Sciences Beijing 100049 China;

    State Key Laboratory of Loess and Quaternary Geology Center for Excellence in Quaternary Science and Global Change Key Laboratory of Aerosol Chemistry & Physics Institute of Earth Environment Chinese Academy of Sciences Xi'an 710061 China Institute of Global Environmental Change Xi'an Jiaotong University Xi'an 710049 China College of Environment and public health Xiamen Huaxia University Xiamen 361024 China;

    State Key Laboratory of Loess and Quaternary Geology Center for Excellence in Quaternary Science and Global Change Key Laboratory of Aerosol Chemistry & Physics Institute of Earth Environment Chinese Academy of Sciences Xi'an 710061 China;

    State Key Laboratory of Loess and Quaternary Geology Center for Excellence in Quaternary Science and Global Change Key Laboratory of Aerosol Chemistry & Physics Institute of Earth Environment Chinese Academy of Sciences Xi'an 710061 China;

    State Key Laboratory of Loess and Quaternary Geology Center for Excellence in Quaternary Science and Global Change Key Laboratory of Aerosol Chemistry & Physics Institute of Earth Environment Chinese Academy of Sciences Xi'an 710061 China University of Chinese Academy of Sciences Beijing 100049 China;

    State Key Laboratory of Loess and Quaternary Geology Center for Excellence in Quaternary Science and Global Change Key Laboratory of Aerosol Chemistry & Physics Institute of Earth Environment Chinese Academy of Sciences Xi'an 710061 China;

    State Key Laboratory of Loess and Quaternary Geology Center for Excellence in Quaternary Science and Global Change Key Laboratory of Aerosol Chemistry & Physics Institute of Earth Environment Chinese Academy of Sciences Xi'an 710061 China;

    State Key Laboratory of Loess and Quaternary Geology Center for Excellence in Quaternary Science and Global Change Key Laboratory of Aerosol Chemistry & Physics Institute of Earth Environment Chinese Academy of Sciences Xi'an 710061 China;

    College of Environment and public health Xiamen Huaxia University Xiamen 361024 China;

    Institute of Inorganic and Analytical Chemistry Johannes Gutenberg University Mainz Duesbergweg 10-14 55128 Mainz Germany;

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  • 正文语种 eng
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  • 关键词

    HULIS; Brown carbon; Optical properties; Sources;

    机译：Hulis;棕色碳;光学性质;来源;

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