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首页> 外文期刊>Atmospheric environment >Decreased gaseous carbonyls in the North China plain from 2004 to 2017 and future control measures
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Decreased gaseous carbonyls in the North China plain from 2004 to 2017 and future control measures

机译：2004年至2017年华北平原气态羰基减少和未来的控制措施

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摘要

Gaseous carbonyls are important precursors of ozone and secondary organic aerosols. To study the characteristics of small-molecule carbonyls (SMC), samples were collected with 2, 4-dinitrophenylhydrazine in Xianghe at the junction of the Beijing, Tianjin and Hebei regions from November 2017 to January 2018 and were subjected to high-performance liquid chromatography-ultraviolet analysis. The mean concentration of SMC was 4.5 +/- 1.1 ppbv, and the observed compounds included acetone (1.9 +/- 1.3 ppbv), acetaldehyde (1.3 +/- 1.0 ppbv) and formaldehyde (1.2 +/- 0.9 ppbv). Compared with the observations in the Beijing-Tianjin-Hebei region from 2004 to 2017, the concentration of SMC decreased and the trends were -1.13, -0.44 and -0.45 ppbv yr(-1), respectively. Using volatile organic compounds as tracers, positive matrix factorization was used to analyze the sources of the SMC. The results showed that, in addition to secondary and long-lived species (84.8%), the main sources of SMC in Xianghe were vehicle emission (8.5%), solvent usage (3.7%) and coal and biomass combustion (3.0%). The significant decline in the contributions of vehicle emissions, coal and biomass combustion is the main reason for the decline in the SMC concentrations. Based on fine particulate matter concentrations, this study found that with the deterioration in air quality, the contribution of each source changed insignificantly. Although the concentrations of SMC dropped significantly, vehicular sources remained the most important sources in this region.
机译：气态羰基是臭氧和二次有机气溶胶的重要前体。为了研究小分子羰基化合物（SMC）的特征，于2017年11月至2018年1月在北京，天津和河北地区交界处的香河以2,4-二硝基苯肼收集样品，并进行了高效液相色谱分析-紫外线分析。 SMC的平均浓度为4.5 +/- 1.1 ppbv，观察到的化合物包括丙酮（1.9 +/- 1.3 ppbv），乙醛（1.3 +/- 1.0 ppbv）和甲醛（1.2 +/- 0.9 ppbv）。与2004年至2017年北京-天津-河北地区的观测值相比，SMC浓度下降，趋势分别为-1.13，-0.44和-0.45 ppbv yr（-1）。使用挥发性有机化合物作为示踪剂，正矩阵分解用于分析SMC的来源。结果表明，除次生和长寿物种（84.8％）外，香河SMC的主要来源是车辆排放（8.5％），溶剂用量（3.7％）以及煤炭和生物质燃烧（3.0％）。车辆排放，煤炭和生物质燃烧的贡献显着下降是SMC浓度下降的主要原因。基于细颗粒物浓度，这项研究发现，随着空气质量的恶化，每种来源的贡献变化不大。尽管SMC的浓度显着下降，但是车辆来源仍然是该地区最重要的来源。

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  • 来源
    《Atmospheric environment》 |2019年第12期|117015.1-117015.8|共8页
  • 作者

    Tang Guiqian; Chen Xi; Li Xingru; Wang Yinghong; Yang Yuan; Wang Yiming; Gao Wenkang; Wang Yapeng; Tao Minghui; Wang Yuesi;

  • 作者单位

    Chinese Acad Sci Inst Atmospher Phys State Key Lab Atmospher Boundary Layer Phys & Atm Beijing 100029 Peoples R China|Chinese Acad Sci Inst Urban Environm Ctr Excellence Urban Atmospher Environm Xiamen 361021 Fujian Peoples R China;

    Capital Normal Univ Beijing 100048 Peoples R China;

    Chinese Acad Sci Inst Atmospher Phys State Key Lab Atmospher Boundary Layer Phys & Atm Beijing 100029 Peoples R China|Univ Chinese Acad Sci Beijing 100049 Peoples R China;

    Chinese Acad Sci Inst Remote Sensing & Digital Earth State Key Lab Remote Sensing Sci Beijing 100101 Peoples R China;

    China Univ Geosci Sch Geog & Informat Engn Hubei Key Lab Crit Zone Evolut Wuhan 430074 Hubei Peoples R China;

    Chinese Acad Sci Inst Atmospher Phys State Key Lab Atmospher Boundary Layer Phys & Atm Beijing 100029 Peoples R China|Chinese Acad Sci Inst Urban Environm Ctr Excellence Urban Atmospher Environm Xiamen 361021 Fujian Peoples R China|Univ Chinese Acad Sci Beijing 100049 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Gaseous carbonyls; Annual trends; Source apportionment;

    机译：气态羰基;年度趋势;源分配;

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