张晓勇;徐虹;吴建会;韩素芹;徐建京;冯银厂;

• 1:中海油天津化工研究设计院
• 2:南开大学环境科学与工程学院
• 3:天津市气象科学研究所

摘要(Abstract)：

通过天津市气象局大气边界层观测站高255 m的气象铁塔,获得了10 m、40 m、120 m和220 m 4个高度共80个PM10样品,分析了PM10的日均质量浓度及其元素的垂直分布特征。结果表明,4个高度处PM10质量浓度时序变化基本一致;PM10质量浓度及其组成元素总量随高度增加递减;10 m、40 m和120 m 3个高度处的PM10质量浓度时间序列分布的相关性较好,组分分歧系数较小,而220 m处的PM10质量浓度时间序列分布与其他3个高度处的相关性较差,组分分歧系数较大。样品中元素质量浓度由高到低依次是Si、Al、Ca、Fe、Na、Mg、K、Zn、Ti、Cu、Mn、Pb、Cr、Ni、Co、V、As、Cd和Hg。其中,Si、Al、Na、K质量分数随高度变化不大;Ca、Fe、Mg质量分数随高度增加递减明显;Zn、Cu、Mn、Pb、Cr在10 m、40 m和120 m 3个高度处质量分数接近,而在220 m处明显降低;Ti元素在4个高度处的质量浓度接近,质量分数总体上随高度增加递增;Ni、Co、V、As、Cd、Hg质量分数随高度的变化不同,其中与燃煤有密切关系的Hg在120 m处质量分数明显高于其他高度处,而在220 m处最低。Al、Fe、Na、K等元素相对富集因子小于或接近1,其质量浓度与PM10质量浓度时序分布的相关性较好,其中Al、Na相关系数随高度增加显著递减;Zn,Cu、Pb、Cr、As、Ni的相对富集因子显著大于1,其质量浓度与PM10质量浓度时序分布的相关性较差,相关系数随高度增加变化不大。

关键词(KeyWords)： 环境学;PM10;元素垂直分布

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 张晓勇;徐虹;吴建会;韩素芹;徐建京;冯银厂;

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