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首页> 美国卫生研究院文献>International Journal of Environmental Research and Public Health >A Spatial-Temporal Resolved Validation of Source Apportionment by Measurements of Ambient VOCs in Central China
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A Spatial-Temporal Resolved Validation of Source Apportionment by Measurements of Ambient VOCs in Central China

机译：中国中部环境VOCs测量的时空解析源分配验证

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Understanding the sources of volatile organic compounds (VOCs) is essential in the implementation of abatement measures of ground-level ozone and secondary organic aerosols. In this study, we conducted offline VOC measurements at residential, industrial, and background sites in Wuhan City from July 2016 to June 2017. Ambient samples were simultaneously collected at each site and were analyzed using a gas chromatography–mass spectrometry/flame ionization detection system. The highest mixing ratio of total VOCs was measured at the industrial site, followed by the residential, and background sites. Alkanes constituted the largest percentage (>35%) in the mixing ratios of quantified VOCs at the industrial and residential sites, followed by oxy-organics and alkenes (15–25%).The values of aromatics and halohydrocarbons were less than 15%. By contrast, the highest values of oxy-organics accounted for more than 30%. The model of positive matrix factorization was applied to identify the VOC sources and quantify the relative contributions of various sources. Gasoline-related emission (the combination of gasoline exhaust and gas vapor) was the most important VOC-source in the industrial and residential areas, with a relative contribution of 32.1% and 40.4%, respectively. Industrial process was the second most important source with a relative contribution ranging from 30.0% to 40.7%. The relative contribution of solvent usage was 6.5–22.3%. Meanwhile, the relative contribution of biogenic emission was only within the range of 2.0–5.0%. These findings implied the importance of controlling gasoline-related and industrial VOC emissions in reducing the VOC emissions in Wuhan.
机译：了解挥发性有机化合物（VOC）的来源对于实施地面臭氧和次要有机气溶胶的减排措施至关重要。在这项研究中，我们于2016年7月至2017年6月在武汉市的住宅，工业和背景场所进行了离线VOC测量。同时在每个场所同时收集环境样品，并使用气相色谱-质谱/火焰电离检测系统进行分析。 。在工业场所，然后是住宅场所和背景场所，测量了总VOC的最高混合比。在工业和住宅场所，烷烃占定量VOC混合比的最大百分比（> 35％），其次是氧化有机物和烯烃（15–25％）。芳烃和卤代烃的含量不到15％。相反，有机氧的最高值占30％以上。应用正矩阵分解模型确定VOC来源并量化各种来源的相对贡献。与汽油有关的排放（汽油废气和汽油蒸气的混合物）是工业和居民区最重要的VOC排放源，相对贡献分别为32.1％和40.4％。工业过程是第二重要的来源，相对贡献率为30.0％至40.7％。溶剂用量的相对贡献为6.5–22.3％。同时，生物排放的相对贡献仅在2.0％至5.0％的范围内。这些发现暗示了控制汽油相关和工业VOC排放对于减少武汉市VOC排放的重要性。

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