徐志强. 上海市徐汇区大气中挥发性有机物的组成及变化特征[J]. 环境与职业医学, 2012, 29(3): 154-156,160.
引用本文: 徐志强. 上海市徐汇区大气中挥发性有机物的组成及变化特征[J]. 环境与职业医学, 2012, 29(3): 154-156,160.
XU Zhi-qiang . Composition and Changes of Volatile Organic Compounds in the Atmosphere of Xuhui District, Shanghai[J]. Journal of Environmental and Occupational Medicine, 2012, 29(3): 154-156,160.
Citation: XU Zhi-qiang . Composition and Changes of Volatile Organic Compounds in the Atmosphere of Xuhui District, Shanghai[J]. Journal of Environmental and Occupational Medicine, 2012, 29(3): 154-156,160.

上海市徐汇区大气中挥发性有机物的组成及变化特征

Composition and Changes of Volatile Organic Compounds in the Atmosphere of Xuhui District, Shanghai

  • 摘要: 目的 研究上海市区大气中挥发性有机化合物(volatile organic compounds,VOCs)的组成和来源,为指示和早期预警区域生态失衡、资源负荷超载和环境污染加剧等现象提供依据。

    方法 采用预浓缩-气相色谱质谱联用(GC-MS)方法分析上海市徐汇区大气中VOCs的组成。

    结果 徐汇区大气中共检测出102种VOCs组分。VOCs平均体积分数为46.39& #215;10-9,其主要的组成特征:50.2%为烷烃、6.8%为烯烃、22.8%为芳香烃、7.5%为炔烃、其它(包括醇、醛、酮、酯和醚等)为12.7%。在检出物中有79种是有毒有害物质,主要成分是苯系物、卤代芳烃、烷烃。其中,甲苯是含量最高的组分。

    结论 徐汇区的VOCs源主要受运行态交通工具的影响,VOCs的污染程度以冬季最为严重,秋季最轻。

     

    Abstract: Objective To study composition and source of atmospheric volatile organic compounds (VOCs) in downtown area of Shanghai, and to provide early warning and indication of regional ecological unbalance, resource overloading and environmental pollution aggravation.

    Methods Preconcentration and gas chromatography-mass selective detector (GC-MS) were used to analyze atmospheric VOCs in Xuhui District of Shanghai.

    Results A total of 102 VOCs components were detected. The average volume fraction of VOCs was 46.39& #215;10-9, and the common components were alkanes (50.2%), olefins (6.8%), aromatic hydrocarbons (22.8%), alkynes (7.5%), and others (12.7%, including alcohol, aldehyde, ketone, ester and ether). Among the identified compositions, 79 were poisonous and harmful. The common hazardous components were benzene hydrocarbon, halogenated aromatic hydrocarbon and alkane, of which toluene was of highest concentration.

    Conclusion The VOCs in Xuhui District is mainly contributed by traffic vehicles. VOCs pollution is most serious in winter vis-& #224;-vis least serious in autumn.

     

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