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The characteristics, seasonal variation and source apportionment of VOCs at Gongga Mountain, China

机译：中国贡嘎山挥发性有机化合物的特征，季节变化和来源分配

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摘要

The mixing ratio, composition and variability of volatile organic compounds (VOCs) were measured from 2008 through 2011 at Gongga Mountain Forest Ecosystem Research Station (102°00'E, 29°33'N, elevation 1640 m), a remote station in southwest China. Weekly samples were collected in the Gongga Mountain area and were analyzed using a three-stage preconcentration method coupled with GC-MS. An advance receptor model positive matrix factorization (PMF) was applied to identify and apportion the sources of VOCs. The results show that the measured VOC mixing ratio at Gongga Mountain is dominated by ar-omatics (35.7%) and alkanes (30.8%), followed by halocarbons (21.6%) and alkenes (11.9%). The general trend of seasonal variation shows higher mixing ratios in spring and lower mixing ratios in autumn. The effect of alkanes and aromatics on the seasonal variation of total volatile organic compounds (TVOCs) is significant. Five sources were resolved by the PMF model: (1) gasoline-related emission (the combination of gasoline exhaust and gas vapor), which contributes 35.1% of the measured VOC mixing ratios; (2) solvent use, contributing 21.8%; (3) fuel combustion, contributing 29.1%; (4) biogenic emission, contributing 5.2%; and (5) industrial, commercial and domestic sources, contributing 8.7%. The effect on this area of the long-range transport of air pollutants from highly polluted areas is significant.
机译：在2008年至2011年期间，在西南偏远的贡嘎山森林生态系统研究站（102°00'E，29°33'N，海拔1640 m）测量了挥发性有机化合物（VOC）的混合比，组成和变异性。中国。每周在贡嘎山区采集样品，并使用三阶段预浓缩方法与GC-MS进行分析。先进的受体模型正矩阵分解（PMF）用于识别和分配VOC的来源。结果表明，贡嘎山实测挥发性有机化合物的混合比主要由芳烃（35.7％）和烷烃（30.8％），其次是卤代烃（21.6％）和烯烃（11.9％）。季节变化的总体趋势显示，春季的混合比较高，而秋季的混合比较低。烷烃和芳烃对总挥发性有机化合物（TVOCs）季节性变化的影响非常明显。 PMF模型解决了五个来源：（1）与汽油有关的排放（汽油废气和气体蒸气的组合），占所测量的VOC混合比的35.1％； （2）使用溶剂，占21.8％； （3）燃料燃烧，占29.1％； （4）生物排放，占5.2％； （5）工业，商业和家庭资源，占8.7％。来自高污染地区的空气污染物的远距离运输对该区域的影响是巨大的。

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  • 来源
    《Atmospheric environment》 |2014年第5期|297-305|共9页
  • 作者

    Junke Zhang; Yang Sun; Fangkun Wu; Jie Sun; Yuesi Wang;

  • 作者单位

    State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China,University of Chinese Academy of Sciences, Beijing 100049, China;

    State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;

    State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;

    State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;

    State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;

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  • 正文语种 eng
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  • 关键词

    VOC sources at Gongga Mountain; Seasonal variation; PMF receptor model; Source apportionment;

    机译：贡嘎山的挥发性有机化合物来源;季节性变化;PMF受体模型;源分配;

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