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    李拥军, 陈瑞, 刘小云, 孙建云. 兰州市空气PM2.5中十种金属和类金属浓度的季节性变化[J]. 环境卫生学杂志, 2017, 7(2): 90-94. DOI: 10.13421/j.cnki.hjwsxzz.2017.02.002
    引用本文: 李拥军, 陈瑞, 刘小云, 孙建云. 兰州市空气PM2.5中十种金属和类金属浓度的季节性变化[J]. 环境卫生学杂志, 2017, 7(2): 90-94. DOI: 10.13421/j.cnki.hjwsxzz.2017.02.002
    shu
    LI Yongjun, CHEN Rui, LIU Xiaoyun, SUN Jianyun. Cross-section Study on Seasonal Variations of PM2.5 Concentrations for Ten Metal and Melloids in Air of Lanzhou City[J]. Journal of Environmental Hygiene, 2017, 7(2): 90-94. DOI: 10.13421/j.cnki.hjwsxzz.2017.02.002
    Citation: LI Yongjun, CHEN Rui, LIU Xiaoyun, SUN Jianyun. Cross-section Study on Seasonal Variations of PM2.5 Concentrations for Ten Metal and Melloids in Air of Lanzhou City[J]. Journal of Environmental Hygiene, 2017, 7(2): 90-94. DOI: 10.13421/j.cnki.hjwsxzz.2017.02.002
    shu

    兰州市空气PM2.5中十种金属和类金属浓度的季节性变化

    Cross-section Study on Seasonal Variations of PM2.5 Concentrations for Ten Metal and Melloids in Air of Lanzhou City

      摘要
    • 摘要:
      目的 通过对兰州市空气中PM2.5监测成分进行研究分析，发现主要污染成分和污染季节，为相关部门制定防控措施提供参考依据。
      方法 2015年分别在兰州市城关区和西固区2个监测点采集PM2.5颗粒物样品，检测PM2.5及10种元素的含量，并分析季节性趋势。
      结果 城关区和西固区PM2.5颗粒物中铅、镉及锰的含量有统计学差异，且城关区高于西固区；城关区四个季节的PM2.5的含量有统计学差异（χ2=18.406，P < 0.001），城关区春季PM2.5的含量最高，为0.12 mg/m3，秋季最低，为0.07 mg/m3；西固区四个季节的PM2.5的含量有统计学差异（χ2=30.0，P < 0.001），西固区冬季PM2.5的含量最高，为0.11 mg/m3，夏季最低，为0.05 mg/m3。
      结论 2015年兰州市城关区和西固区PM2.5颗粒物及其元素污染水平有差别，需要重视不同季节大气污染，制定相应的污染防控措施。

       

      Abstract:
      Objective To understand the concentrations of ten metal and metalloids in PM2.5 of air in Lanzhou city, and to find out the main pollutants and heavy polluted seasons, thus to provide a basic data for air pollution control.
      Methods Chengguan District and Xigu District of Lanzhou were selected as the surveillance sites. The concentration of PM2.5 and ten metal and melloids in air samples were determined in 2015.
      Results The concentration of Plumbum (Pb), Cadmium (Cd) and Manganese (Mn) of PM2.5 in Chengguan district were higher than those in Xigu district, and the seasonal variation of these three metals were significant in Chengguan district(χ2=18.406, P < 0.001) and Xigu district (χ2=30.0, P < 0.001). For instance, the concentration of PM2.5 in Chengguan district in the Spring was the highest (0.12 ng/m3), and in Xigu district in the Winter was the highest (0.11 ng/m3).
      Conclusions There were obvious seasonal trend on concentration of several ten metal and melloid in PM2.5 in 2015. Hence, the measure on prevention of air pollution should comply with the prevalence characteristics of air pollution in different seasons.

       

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