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首页> 外文期刊>Journal of earth system science >Investigation of sources of atmospheric dust in Guiyang City, southwest China using rare earth element patterns
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Investigation of sources of atmospheric dust in Guiyang City, southwest China using rare earth element patterns

机译：稀土元素模式调查贵阳市贵阳市大气尘埃

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Rare earth elements (REE) of atmospheric dust were used in many investigations to trace the potential sources of environmental materials. In this study, we collected atmospheric dry deposition samples monthly from May of 2009 to January of 2011 over one and half year in a typical karst urban area of Guiyang city, southwest China, and measured the contents of REE to trace the sources. The total REE contents ($Sigma$REE) of the dusts ranged from $m{9.48 to 181 mg kg^{-1}}$, with an average of $m{93.9 mg kg^{-1}}$. The $Sigma$REE content of atmospheric dusts is similar to the contents of local soils. All the dust samples showed slighter Ce and Eu anomalies, and the dusts deposited in dry season showed slightly positive Ce anomaly. PAAS (post-Archean Australian shale) normalized REE patterns showed that there was significant difference between the dusts of dry seasons and wet seasons. The values of PAAS-normalized $La_{N}/Yb_{N}$, $La_{N}/Sm_{N}$ and $Gd_{N}/Yb_{N}$ of atmospheric dusts were closer to those of local soils collected in dry seasons, whereas the REE characteristics and patterns of dusts were similar to anthropogenic urban air particulates in wet seasons, demonstrating that dusts weremainly originated from anthropogenic inputs.
机译：在许多调查中使用了大气尘埃的稀土元素（REE）以追踪潜在的环境材料来源。在这项研究中，我们每月从2009年5月到2011年1月收集大气干燥沉积样品在中国西南部贵阳市典型喀斯特市区的一年半月，并测量了追溯这些来源的REE的内容。灰尘的总重新内容（$ sigma $ ree）从$ rm {9.48到181 mg kg ^ { - 1}} $，平均$ rm {93.9 mg kg ^ { - 1}} $。大气粉尘的$ SIGMA $ REE含量与当地土壤的内容类似。所有的粉尘样本都显示出较轻的CE和欧盟异常，沉积在干燥季节的粉尘显示出略微阳性的CE异常。 PAAS（Archean澳大利亚页岩）标准化的REE模式表明，干燥季节和湿季节的灰尘之间存在显着差异。 PaaS-Normalized $ la_ {n} / yb_ {n} $的值，$ la_ {n} / sm_ {n} $和$ gd_ {n} / yb_ {n} $大气粉尘更接近当地的粉尘在干燥的季节收集的土壤，而湿季节的人为城市空气颗粒类似于人为城市空气颗粒，展示了灰尘来自人为投入的粉尘。

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