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    刘小云, 张甜, 夏智恒, 李拥军. 兰州市2015年一季度大气PM2.5中无机元素污染特征及潜在生态风险评价[J]. 环境卫生学杂志, 2020, 10(3): 249-254. DOI: 10.13421/j.cnki.hjwsxzz.2020.03.004
    引用本文: 刘小云, 张甜, 夏智恒, 李拥军. 兰州市2015年一季度大气PM2.5中无机元素污染特征及潜在生态风险评价[J]. 环境卫生学杂志, 2020, 10(3): 249-254. DOI: 10.13421/j.cnki.hjwsxzz.2020.03.004
    shu
    LIU Xiaoyun, ZHANG Tian, XIA Zhiheng, LI Yongjun. Pollution Characteristics and Potential Ecological Risk of Inorganic Elements in PM2.5 during First Quarter of 2015 in Lanzhou[J]. Journal of Environmental Hygiene, 2020, 10(3): 249-254. DOI: 10.13421/j.cnki.hjwsxzz.2020.03.004
    Citation: LIU Xiaoyun, ZHANG Tian, XIA Zhiheng, LI Yongjun. Pollution Characteristics and Potential Ecological Risk of Inorganic Elements in PM2.5 during First Quarter of 2015 in Lanzhou[J]. Journal of Environmental Hygiene, 2020, 10(3): 249-254. DOI: 10.13421/j.cnki.hjwsxzz.2020.03.004
    shu

    兰州市2015年一季度大气PM2.5中无机元素污染特征及潜在生态风险评价

    Pollution Characteristics and Potential Ecological Risk of Inorganic Elements in PM2.5 during First Quarter of 2015 in Lanzhou

      摘要
    • 摘要:
      目的 调查兰州市2015年一季度大气PM2.5中无机元素污染程度及潜在生态风险。
      方法 在兰州市两个采样点采集PM2.5样品，用ICP-MS法测定PM2.5样品中无机元素的含量，用富集因子法和危害指数法分析PM2.5中无机元素对生态危害程度。
      结果 兰州市两城区一季度PM2.5含量（中位值）均超过《环境空气质量标准》（GB 3095-2012）PM2.5二级标准75 μg/m3，超标倍数约1.6倍；富集因子分析显示Mo、Cu、Cd 3种元素都达到超富集程度，其污染由人为因素造成；11种无机元素（V、Cr、Mn、Co、Ni、Cu、Zn、As、Cd、Hg和Pb）的生态危害系数及生态风险指数分析表明，Cd和Hg有极强的生态危害，Cu的生态危害等级为强，Pb是中等，其他7种元素生态危害轻微，总体生态危害指数为2 116。
      结论 兰州市2015年一季度PM2.5中无机元素对生态危害极强，今后需要加以控制。

       

      Abstract:
      Objectives To investigate the pollution degree and potential ecological risk of inorganic elements in PM2.5 of Lanzhou in the first quarter of 2015.
      Methods PM2.5 samples were collected at two sampling sites in Lanzhou. ICP-MS was used to determine the content of inorganic elements in PM2.5. The pollution status was evaluated by enrichment factors and Hakanson potential ecological risk index, respectively.
      Results The PM2.5 content in Lanzhou in the first quarter was 1.6 times higher than the limit for grade two standard 75 μg/m3 of PM2.5, ruled in GB 3095-2012 Ambient Air Quality Standards.Enrichment factor analysis of 11 inorganic elements (V, Cr, Mn, Co, Ni, Cu, Zn, As, Cd, Hg and Pb) showed that Mo, Cu and Cd reached hyperaccumulation, which were caused by human factors. The potential ecological risk of Cd and Hg was extremely strong, while ecological harm degree of Cu and Pb was stronger, the other 7 elements had slight ecological hazards. The whole potential ecological risk degree was 2 116.
      Conclusions The potential ecological risk of inorganic elements in PM2.5 in Lanzhou in the first quarter of 2015 is extremely strong, and corresponding control measures should be taken.

       

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