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    杨一兵, 常君瑞, 李欣, 史建平, 王秦, 徐东群. 太原城区冬夏两季大气PM2.5上PAHs的污染特征及来源研究[J]. 环境卫生学杂志, 2018, 8(3): 168-175. DOI: 10.13421/j.cnki.hjwsxzz.2018.03.002
    引用本文: 杨一兵, 常君瑞, 李欣, 史建平, 王秦, 徐东群. 太原城区冬夏两季大气PM2.5上PAHs的污染特征及来源研究[J]. 环境卫生学杂志, 2018, 8(3): 168-175. DOI: 10.13421/j.cnki.hjwsxzz.2018.03.002
    shu
    YANG Yibing, CHANG Junrui, LI Xin, SHI Jianping, WANG Qin, XU Dongqun. The Characteristics and Sources of PAHs on PM2.5 during Summer and Winter in the Urban Area of Taiyuan[J]. Journal of Environmental Hygiene, 2018, 8(3): 168-175. DOI: 10.13421/j.cnki.hjwsxzz.2018.03.002
    Citation: YANG Yibing, CHANG Junrui, LI Xin, SHI Jianping, WANG Qin, XU Dongqun. The Characteristics and Sources of PAHs on PM2.5 during Summer and Winter in the Urban Area of Taiyuan[J]. Journal of Environmental Hygiene, 2018, 8(3): 168-175. DOI: 10.13421/j.cnki.hjwsxzz.2018.03.002
    shu

    太原城区冬夏两季大气PM2.5上PAHs的污染特征及来源研究

    The Characteristics and Sources of PAHs on PM2.5 during Summer and Winter in the Urban Area of Taiyuan

      摘要
    • 摘要:
      目的 分析夏季和冬季太原市不同区域的PM2.5和PM2.5上附着PAHs的污染特征，对PAHs的来源进行初步识别。
      方法 于2017年6月-2018年1月的夏季和冬季，在太原市三个采样点各进行两期PM2.5监测，并对其附着PAHs污染水平进行检测，比较分析不同季节和采样点的污染水平，并利用特征比值法对PAHs的来源进行了初步识别。
      结果 夏季PM2.5和PAHs浓度分别为69.2 μg/m3和4.33 ng/m3，冬季时为111.9 μg/m3和39.71 ng/m3，冬季PM2.5和PAHs的浓度均显著高于夏季（P < 0.05）。夏季时污染区采样点的PAHs浓度与市中心的两个采样点无显著性差异，但冬季第一期时污染区的PAHs浓度显著高于市中心区。特征比值结果显示太原市PM2.5上的PAHs主要来源于本地燃烧源，冬季时主要来源于燃煤，夏季时主要来自机动车尾气和燃煤的混合源。
      结论 太原市PM2.5和PAHs的污染水平均有明显的季节性差异，不同区域PAHs的浓度有所不同，燃煤和机动车尾气对PAHs均有重要贡献。

       

      Abstract:
      Objectives  To investigate the characteristics of PAHs on PM2.5 in different areas of Taiyuan in summer and winter, and to identify the sources of ambient PAHs on PM2.5.
      Methods  The level of PM2.5 and PAHs at three sampling sites in Taiyuan were detected from June 2017 to January 2018. Samples were collected both in summer and winter. The concentration of PM2.5 and PAHs in different season and sites were compared. A characteristic ratio method was used to identify the source of PAHs.
      Results  The concentration of PM2.5 and PAHs in summer was 69.2 μg/m3 and 4.33 ng/m3; and that in winter was 111.9 μg/m3 and 39.71 ng/m3, respectively. The concentration of PM2.5 and PAHs in winter was significantly higher than that in summer (P < 0.05). There was no significant difference of PAHs concentration between the sampling site in the polluted area and two sampling sites in the downtown during summer, but the concentration of PAHs in the polluted area was significantly higher than that in downtown area during the first sampling period of winter. The result of characteristic ratio showed that the source of ambient PAHs in Taiyuan City mainly came from coal combustion. In winter, the source of PAHs mainly came from coal combustion, while in the summer mainly came from a mixed source of motor vehicle exhausting and coal combustion.
      Conclusions  The level of PM2.5 and PAHs in Taiyuan city was different in summer and winter. The concentration of PAHs was different in different areas. Coal combustion and motor vehicle exhausting were important contributors to ambient PAHs in Taiyuan.

       

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