杨程, 杨兴堂, 袁震, 季鹏, 严丽丽, 沈先标. 上海市某采样点2014—2017年冬季大气PM2.5中金属和类金属成分特征分析[J]. 上海预防医学, 2020, 32(4): 290-293. DOI: 10.19428/j.cnki.sjpm.2020.19729
引用本文: 杨程, 杨兴堂, 袁震, 季鹏, 严丽丽, 沈先标. 上海市某采样点2014—2017年冬季大气PM2.5中金属和类金属成分特征分析[J]. 上海预防医学, 2020, 32(4): 290-293. DOI: 10.19428/j.cnki.sjpm.2020.19729
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YANG Cheng, YANG Xing-tang, YUAN Zhen, JI Peng, YAN Li-li, SHEN Xian-biao. Composition characteristics of PM2.5 metals and metalloids in a sampling point of Shanghai in winter from 2014 to 2017[J]. Shanghai Journal of Preventive Medicine, 2020, 32(4): 290-293. DOI: 10.19428/j.cnki.sjpm.2020.19729
Citation: YANG Cheng, YANG Xing-tang, YUAN Zhen, JI Peng, YAN Li-li, SHEN Xian-biao. Composition characteristics of PM2.5 metals and metalloids in a sampling point of Shanghai in winter from 2014 to 2017[J]. Shanghai Journal of Preventive Medicine, 2020, 32(4): 290-293. DOI: 10.19428/j.cnki.sjpm.2020.19729
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上海市某采样点2014—2017年冬季大气PM2.5中金属和类金属成分特征分析

Composition characteristics of PM2.5 metals and metalloids in a sampling point of Shanghai in winter from 2014 to 2017

    摘要
  • 摘要:
    目的 通过连续4年的动态监测探究上海某采样点大气细颗粒物(PM2.5)中金属和类金属成分组成和分布的特征。
    方法 采样点位于上海市某社区卫生服务中心楼顶, 采样高度12.5 m, 在2014—2017年的4个冬季(每年的12月至次年2月), 每月10—16日连续采样7 d, 每次采样22 h, 并采用电感耦合等离子体质谱仪(ICP/MS)测定样本中12种金属和类金属元素的含量。
    结果 采用两两比较秩和检验, 总金属、铝(Al)、铍(Be)、铬(Cr)、汞(Hg)、铅(Pb)、锰(Mn)、镍(Ni)、硒(Se)及铊(Tl)的组间两两比较差异有统计学意义; Cochran-Armitage趋势检验显示, Al随时间变化呈升高趋势, Cr、Pb和Ni随时间变化呈降低趋势; 因子分析显示, 各年度的因子1中有相对稳定的构成元素(As、Cd、Pb、Mn、Se), 其余因子的内部构成相对不稳定。
    结论 该地可能存在相对稳定的污染源排放, Al、Cr、Pb和Ni存在明显升高或降低趋势。

     

    Abstract:
    Objective To explore the composition and distribution of metal and metalloids in fine particulate metter in a certain area of Shanghai through four consecutive years of dynamic monitoring.
    Methods The sampling point was on the roof of a community health service center in Shanghai, with a height of 12.5 meters.In the four winters of 2014-2017 from Dec. to Feb. next year, samples were continuously collected for 7 days(from 10th to 16th) a month and 22 hours for each day.Inductively coupled plasma-mass spectrometry (ICP-MS) was used for the determination of metals and metalloids in collected samples.
    Results The pairwise comparisons between the total metals, Al, Be, Cr, Hg, Pb, Mn, Ni, Se and Tl in any two years were statistically different through the rank sum test.In the Cochran-Armitage trend test, Al showed an upward trend in the whole periods, while Cr, Pb and Ni was on a downward trend.In factor analysis, factor 1 in each year had relatively stable component elements (As, Cd, Pb, Mn, Se), while the internal components of the remaining factors were relatively unstable.
    Conclusions There may be relatively stable sources of pollution locally.Al, Cr, Pb and Ni have a significant tendency to increase or decrease.

     

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