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Chemical composition of PM_(2.5) from two tunnels with different vehicular fleet characteristics

机译:不同车队特征的两条隧道PM_(2.5)的化学成分

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摘要

The chemical compositions of PM_(2.5) including OC, EC, water soluble ions, elements, and organic components such as polycyclic aromatic hydrocarbons (PAHs), hopanes, and steranes, emitted in Wuzushan (WZS) and Kuixinglou (KXL) tunnels were determined. WZS tunnel is a major route for diesel vehicles traveling, while KXL tunnel has limited to diesel vehicles. The results showed that the proportions of the different constituents of PM_(2.5) in the Wuzushan (WZS) tunnel were OC (27.7%), EC (32.1%), elements (13.9%), and water soluble ions (9.2%). Whereas the chemical profile of PM_(2.5) in the Kuixinglou (KXL) tunnel was OC (17.7%), EC (10.4%), elements (8.90%), and water soluble ions (8.87%). The emission factors (EFs) of PM_(2.5) and proportions of SO_4~(2-) and Pb were decreased by vehicle emission standards and fuel quality policy in China, and the higher molecular weight PAHs (4 + 5 + 6 rings) were more abundant than the lower molecular weight PAHs (2 + 3 rings) in the two tunnels. The proportions of 17A(H)-21 B(H)-30-Norhopane and 17A(H)-21B(H)-Hopane in the hopane and sterane were not dependent on the vehicles types. In addition, specific composition profiles for PM_(2.5) from gasoline-fueled vehicles (GV) and diesel-fueled vehicles (DV) emissions were drafted, which indicated that OC (0.974 mg·veh~(-1)·km~(-1)) was the most abundant component in PM_(2.5), followed by Fe, Cl~-, and Mg for GV. The relative proportions of the different constituents in the PM_(2.5) for DV were EC (35.9%), OC (27.2%), elements (12.8%), and water soluble ions (11.7%). Both the PM_(2.5) EFs and EC proportions in DV were higher than those in GV, and the HMW PAHs were the dominant PAHs for both GV and DV. The PM_(2.5) emissions from the vehicles in Yantai were 581 ±513 tons to 1353 ± 1197 tons for GV, and 19,627 ± 2477 tons to 23,042 ± 2887 tons for DV, respectively.
机译:确定了五足山(WZS)和奎星楼(KXL)隧道中排放的PM_(2.5)的化学成分,包括OC,EC,水溶性离子,元素和有机成分,例如多环芳烃(PAHs),hop烷和甾烷。 。 WZS隧道是柴油车辆行驶的主要路线,而KXL隧道仅限于柴油车辆。结果表明,乌祖山(WZS)隧道中PM_(2.5)的不同组成比例为OC(27.7%),EC(32.1%),元素(13.9%)和水溶性离子(9.2%)。而奎星楼(KXL)隧道中PM_(2.5)的化学特征为OC(17.7%),EC(10.4%),元素(8.90%)和水溶性离子(8.87%)。中国的车辆排放标准和燃油质量政策降低了PM_(2.5)的排放因子(EFs)和SO_4〜(2-)和Pb的比例,较高分子量的PAHs(4 + 5 + 6环)降低了比两个通道中的较低分子量PAH(2 + 3个环)更丰富。 hop烷和甾烷中17A(H)-21 B(H)-30-正庚烷和17A(H)-21B(H)-正庚烷的比例与车辆类型无关。此外,还绘制了汽油车(GV)和柴油车(DV)排放的PM_(2.5)的具体成分分布图,表明OC(0.974 mg·veh〜(-1)·km〜(- 1))是PM_(2.5)中含量最高的组分,其次是GV的Fe,Cl〜-和Mg。 DV的PM_(2.5)中不同成分的相对比例为EC(35.9%),OC(27.2%),元素(12.8%)和水溶性离子(11.7%)。 DV中的PM_(2.5)EF和EC比例均高于GV,而HMW PAHs是GV和DV的主要PAH。烟台车辆的PM_(2.5)排放量GV分别为581±513吨至1353±1197吨,DV分别为19627±2477吨至23042±2887吨。

著录项

  • 来源
    《The Science of the Total Environment》 |2016年第15期|123-132|共10页
  • 作者单位

    Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China,University of Chinese Academy of Sciences, Beijing, China;

    Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China,Key Laboratory of Cities' Mitigation and Adaptation to Climate Change in Shanghai (China Meteorological Administration), College of Environmental Science and Engineering, Tongji University, Shanghai, China;

    Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China;

    Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China,University of Chinese Academy of Sciences, Beijing, China;

    State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, China;

    State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    PM_(2.5); Tunnels; Emission factors; Gasoline-fueled vehicles; Diesel-fueled vehicles;

    机译:PM_(2.5);隧道;排放因子;汽油车;柴油车;

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