赣南小流域水体中溶解态稀土含量及pH和Eh值变化特征

测试流经稀土矿区河水的pH和Eh值，可以反映矿区的酸碱性、氧化还原环境。本文以赣南地区濂水、桃江、东江流域为研究对象，利用ICP-MS和三通道多参数测试仪分别测试水样中溶解态稀土含量（ DREEs）和pH、Eh值，分析pH、Eh值的变化特征以及DREEs含量与pH值的相关性。结果表明：①研究区水体中DREEs含量变化较大，介于几μg/L至几十mg/L之间；DREEs经球粒陨石标准化后表现为弱的轻稀土富集模式，Eu、Ce显示负异常；②溶解态稀土及La含量分别与pH值呈弱的负相关性，说明地表水体中DREEs浓度及分布模式在一定程度上受外部环境酸碱性的影响；③对于流经地层、地层内离子吸附型稀土矿区的...

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Published in岩矿测试 Vol. 34; no. 4; pp. 487 - 493
Main Author 何晗晗 于扬 刘新星 黄凡 赵芝 李超
Format Journal Article
LanguageChinese
Published 中国地质科学院矿产资源研究所,北京,100037%国土资源部成矿作用与资源评价重点实验室，中国地质科学院矿产资源研究所，北京100037%中国地质大学 北京 地球科学与资源学院,北京,100083%国家地质实验测试中心,北京,100037 2015
Subjects
Eh值
pH值
溶解性稀土
电感耦合等离子体质谱法
赣南小流域
电感耦合等离子体质谱法
pH value
Eh value
pH值
dissolved rare earth elements
赣南小流域
Eh值
small watershed in South Jiangxi Province
溶解性稀土
Inductively Coupled Plasma-Mass Spectrometry
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ISSN0254-5357
DOI10.15898/j.cnki.11-2131/td.2015.04.018

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Summary:测试流经稀土矿区河水的pH和Eh值，可以反映矿区的酸碱性、氧化还原环境。本文以赣南地区濂水、桃江、东江流域为研究对象，利用ICP-MS和三通道多参数测试仪分别测试水样中溶解态稀土含量（ DREEs）和pH、Eh值，分析pH、Eh值的变化特征以及DREEs含量与pH值的相关性。结果表明：①研究区水体中DREEs含量变化较大，介于几μg/L至几十mg/L之间；DREEs经球粒陨石标准化后表现为弱的轻稀土富集模式，Eu、Ce显示负异常；②溶解态稀土及La含量分别与pH值呈弱的负相关性，说明地表水体中DREEs浓度及分布模式在一定程度上受外部环境酸碱性的影响；③对于流经地层、地层内离子吸附型稀土矿区的水样，其pH均值分别为7.40、6.94，Eh均值分别为-0.023 V、6.55 mV；对于流经岩体、风化壳离子吸附型稀土矿区的水样，其pH均值分别为6.61、4.37，Eh均值分别为0.024 V、0.15 V，表明赣南地区离子吸附型稀土矿区处于中酸性的氧化环境。
Bibliography:11-2131/TD
Knowing the pH and Eh values of stream water flowing through the rare earth element deposits can lead to an understanding of the acidity and alkalinity and oxidation-reduction environment of deposits. For this purpose, the Lianshui,Taojiang and Dongjiang rivers in South Jiangxi were selected for study. The dissolved rare earth elements （ DREEs ） and pH-Eh values of water samples were analyzed by Inductively Coupled Plasma-Mass Spectrometry（ ICP-MS）and Three-channel Multi-parameter,respectively. Conclusions are listed as follows：（1）DREEs contents range widely from several μg/L to tens of mg/L,and chondrite-normalized DREEs patterns show a slightly right-inclined trend with Eu and Ce negative anomalies. （ 2 ）The weakly negative correlations of DREEs and La contents with pH values indicate that the DREEs contents in water and distribution patterns are affected by the pH values of external environment. （ 3 ）Stream water samples flowing through stratums and ion-adsorbed type REE deposits in stratums have
ISSN:0254-5357
DOI:10.15898/j.cnki.11-2131/td.2015.04.018