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Rare earth elements concentrations and speciation in rainwater from Guiyang, an acid rain impacted zone of Southwest China
Zhaozhou Zhu;  Cong-Qiang Liu;  Zhong-Liang Wang;  Xiaolong Liu;   Jun Li
2016
发表期刊Chemical Geology
卷号442页码:23-34
摘要

Rare earth elements (REEs) and major ions were determined in rainwater samples collected from Guiyang in the acid rain impacted zone of Southwest China. The concentrations of total dissolved and acid-soluble REEs in rainwater are higher than those of most of the world's cities as well as the local surface water. The dissolved REE concentrations are negatively correlated to pH in rainwater. This is consistent with acidification of rainwater resulting in increasing REE concentrations. Speciation calculations using the PHREEQC-Model predict that the free REE metal ion (i.e., Ln3 +), sulfate (LnSO4+), oxalate (LnOx+ and LnOx2) and fluoride (LnF2 +) complexes were relatively important forms of dissolved REE. Although the contribution to rainwater acidity of oxalic acid is much lower than that of sulfuric acid, the proportion of REE-oxalate complexes is not lower than that of REE-sulfate complexes in rain waters. The rainwater is enriched in the middle REEs (MREE) compared to both the light REEs (LREE) and heavy REEs (HREE). REE-phosphate complexes, phosphatic minerals and a Fe-Mn-oxyhydroxide coating are more likely controls on the development of MREE enrichment in the rainwater. Complexation of sulfate and REE played little role in the development of MREE enrichment, even though sulfate is the most important anion in acidic rainwater. In the shale-normalized REE pattern plot, La showed a clear positive anomaly. La might have two main anthropogenic sources in rainwater. One of the important sources could be automobile emission; another main source of excess La in rainwater could be the REE fertilizer that has been widely used in the agriculture of China for approximately 30 years.

关键词Rare Earth Elements concentration speciation la Anomaly acid Rain
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/9611
专题环境地球化学国家重点实验室
作者单位1.Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin 300387, China
2.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
推荐引用方式
GB/T 7714
Zhaozhou Zhu;Cong-Qiang Liu;Zhong-Liang Wang;Xiaolong Liu; Jun Li. Rare earth elements concentrations and speciation in rainwater from Guiyang, an acid rain impacted zone of Southwest China[J]. Chemical Geology,2016,442:23-34.
APA Zhaozhou Zhu;Cong-Qiang Liu;Zhong-Liang Wang;Xiaolong Liu; Jun Li.(2016).Rare earth elements concentrations and speciation in rainwater from Guiyang, an acid rain impacted zone of Southwest China.Chemical Geology,442,23-34.
MLA Zhaozhou Zhu;Cong-Qiang Liu;Zhong-Liang Wang;Xiaolong Liu; Jun Li."Rare earth elements concentrations and speciation in rainwater from Guiyang, an acid rain impacted zone of Southwest China".Chemical Geology 442(2016):23-34.
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