青岛大气气溶胶中微量元素溶解度及影响因素

发布时间：2018-04-10 00:30

本文选题：微量元素　切入点：气溶胶　出处：《中国环境科学》2016年11期

【摘要】：利用2012年12月在青岛采集的31个总悬浮颗粒物(TSP)样品,分析其中11种微量元素的总浓度和溶解态浓度,讨论了沙尘负载、气溶胶来源、酸过程及天气条件对微量元素溶解度的影响.结果表明,Fe和Al的溶解度5%,Pb、Ba、Bi的为10%左右,Cu、V、Cd、Mn的为20%~30%,Zn和As的约为40%.随着沙尘负载量的增加,气溶胶中微量元素溶解度呈规律性递减.气团后向轨迹聚类分析和正矩阵因子分析(PMF)结果显示,受人为源影响的气溶胶中微量元素溶解度明显高于受沙尘源影响的,受二次生成源和海洋源影响的的气溶胶中微量元素溶解度明显高于受土壤源影响的.大气酸过程是造成这些差异的主要原因.相关性分析表明,SO_4~(2-)、NO_3~-和有机酸等酸组分均对微量元素溶解度有一定影响.霾天时气溶胶中微量元素溶解度明显低于雾天的,其原因为酸组分在较高的相对湿度下更能促进微量元素溶解度的提高.
[Abstract]:Using 31 TSPs samples collected in Qingdao in December 2012, the total concentration and dissolved concentration of 11 trace elements were analyzed, and the dust loading and aerosol sources were discussed.Effects of acid process and weather conditions on solubility of trace elements.The results show that the solubility of Fe and Al is about 10% and the solubility of Fe and Al is about 10%.With the increase of dust load, the solubility of trace elements in aerosol decreases regularly.The results of cluster analysis and positive matrix factor analysis (PMF) showed that the solubility of trace elements in aerosols affected by anthropogenic sources was significantly higher than that by dust sources.The solubility of trace elements in aerosols affected by secondary and marine sources was significantly higher than that by soil sources.Atmospheric acid processes are the main cause of these differences.The correlation analysis showed that the acid components such as the acid components such as so _ 4, O _ 4, O _ 3- and organic acids had some influence on the solubility of trace elements.The solubility of trace elements in aerosols during haze is obviously lower than that in foggy days, which is due to the fact that the acid components can promote the solubility of trace elements at higher relative humidity.
【作者单位】：中国海洋大学环境科学与工程学院;中国海洋大学海洋环境与生态教育部重点实验室;中国海洋大学海洋环境学院;
【基金】：国家重大科学研究计划项目(2014CB9537002) 国家自然科学基金资助项目(41210008;41176097)
【分类号】：X513

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