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首页> 外文期刊>Environmental Science & Technology >Multiple Sulfur Isotope Constraints on Sources and Formation Processes of Sulfate in Beijing PM_(2.5) Aerosol
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Multiple Sulfur Isotope Constraints on Sources and Formation Processes of Sulfate in Beijing PM_(2.5) Aerosol

机译：北京PM_（2.5）气溶胶中硫酸盐来源和形成过程的多重硫同位素约束

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摘要

Recently air pollution is seriously threatening the health of millions of people in China. The multiple sulfur isotopic composition of sulfate in PM_(2.5) samples collected in Beijing is used to better constrain potential sources and formation processes of sulfate aerosol. The Δ~(33)S values of sulfate in PM_(2.5) show a pronounced seasonality with positive values in spring, summer and autumn and negative values in winter. Positive Δ~(33)S anomalies are interpreted to result from SO_2 photolysis with self-shielding, and may reflect air mass transport between the troposphere and the stratosphere. The negative Δ~(33)S signature (-0.300‰ < Δ~(33)S < 0‰) in winter is possibly related to incomplete combustion of coal in residential stoves during the heating season, implying that sulfur dioxide released from residential stoves in more rural areas is an important contributor to atmospheric sulfate. However, negative Δ~(33)S anomalies (-0.664‰ < Δ~(33)S ← 0.300‰) in winter and positive Δ~(33)S anomalies (0.300‰ < Δ~(33)S < 0.480‰) in spring, summer, and autumn suggest sulfur isotopic equilibrium on an annual time frame, which may provide an implication for the absence of mass-independent fractionation of sulfur isotopes (S-MIF) in younger sediments. Results obtained here reveal that reducing the usage of coal and improving the heating system in rural areas will be important for efficiently decreasing the emissions of sulfur in China and beyond.
机译：最近，空气污染严重威胁着中国数百万人的健康。在北京收集的PM_（2.5）样品中，硫酸盐的多种硫同位素组成被用来更好地限制硫酸盐气溶胶的潜在来源和形成过程。 PM_（2.5）中硫酸盐的Δ〜（33）S值表现出明显的季节性，春季，夏季和秋季为正值，冬季为负值。 Δ〜（33）S正异常被解释为具有自屏蔽功能的SO_2光解引起的，并且可能反映了对流层和平流层之间的空气质量传输。冬季的Δ〜（33）S负信号（-0.300‰<Δ〜（33）S <0‰）可能与供暖季节内的煤炉中煤的不完全燃烧有关，这意味着从煤炉中释放出的二氧化硫在更多的农村地区，大气中的硫酸盐是重要的贡献者。但是，冬季出现Δ〜（33）S负异常（-0.664‰<Δ〜（33）S←0.300‰），而出现Δ〜（33）S异常正（0.300‰<Δ〜（33）S <0.480‰）在春季，夏季和秋季，建议在每年的时间框架内实现硫同位素平衡，这可能暗示在较年轻的沉积物中不存在质量无关的硫同位素分馏（S-MIF）。此处获得的结果表明，减少煤炭用量和改善农村地区的供热系统对于有效减少中国及其他地区的硫排放至关重要。

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  • 来源
    《Environmental Science & Technology》 |2017年第14期|7794-7803|共10页
  • 作者

    Han Xiaokun; Guo Qingjun; Strauss Harald; Liu Congqiang; Hu Jian; Guo Zhaobing; Wei Rongfei; Peters Marc T.; Tian Liyan; Kong Jing;

  • 作者单位

    Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11A Datun Road, Chaoyang, Beijing, China;

    Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11A Datun Road, Chaoyang, Beijing, China,College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China;

    Institut für Geologie und Paläontologie, Westfälische Wilhelms-Universität Münster, Corrensstrasse 24, Münster, Germany;

    State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang Guizhou, China;

    State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang Guizhou, China;

    School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, China;

    Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11A Datun Road, Chaoyang, Beijing, China;

    Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11A Datun Road, Chaoyang, Beijing, China;

    Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11A Datun Road, Chaoyang, Beijing, China;

    Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11A Datun Road, Chaoyang, Beijing, China;

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