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环境化学  2015 

青藏高原不同粒径大气颗粒物元素分析

Keywords: 大气颗粒物,青藏高原,粒径分布

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Abstract:

为研究青藏高原大气颗粒物化学组成特征,利用Andersen分级撞击式采样器进行大气颗粒物分级采样,建立并优化HNO3+H2O2+HF混合酸密闭消解的体系,并结合电感耦合等离子体质谱分析其中21种元素.结果表明,Na、Mg、Al、K、Ca、Fe元素浓度分别为469.12、286.61、430.75、390.92、783.59ng·m-3和1289.32ng·m-3,占所测元素的97.8%.粒径分布显示,Na、Mg、Al、K、Ca、V、Cr、Mn、Fe、Ni、Sr、Ba在5.8-9.0μm粒径范围出现峰值;Co、Cu、Zn、As、Se、Mo、Cd、Tl、Pb在0.43-0.65μm和5.8-9.0μm粒径范围出现双峰.

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