A preliminary assessment of the concentrations of rare earth elements in an acidic fresh groundwater (south-eastern Nigeria)
A preliminary assessment of the concentrations of rare earth elements in an acidic fresh groundwater (south-eastern Nigeria)
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DOI：
10.1179/037174504225004475
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发表时间：
2004-04
期刊：
影响因子：
--
通讯作者：
A. Edet
中科院分区：
文献类型：
--
作者：
A. Edet
这项研究记录了尼日利亚东南部沿海平原砂岩含水层的酸性淡水地下水中稀土元素的浓度。其目的主要是确定稀土的浓度、模式和可能的来源，并将稀土数据与文献中报告的其他地区的浓度进行比较。结果表明，部分天然淡水、咸水和受污染水体的稀土元素总量浓度普遍小于文献值。与轻稀土(LREE)和重稀土(HREE)相比，地下水在中稀土(MREEs)中富集。这种富集性归因于与含水层有关的次生富铝矿物相，以及酸性水对富铁无机颗粒的溶解和/或颗粒表面的富铁涂层。稀土元素特征的来源与邻近地区的岩石有关，这是基于地下水和源岩中类似的Ce异常模式。
This study documents the concentrations of rare earth elements (REEs) in an acidic fresh groundwater of a coastal plain sand aquifer in south-eastern Nigeria. The aim was mainly to determine the concentrations, patterns, and probable source of REEs and to compare the REE data with reported concentrations in the literature for other areas. The results show that the concentrations of the sum of the REEs are generally less than the values in the literature for some natural fresh groundwaters, saline groundwaters and contaminated waters. The groundwaters are enriched in the middle REEs (MREEs) compared to the light REEs (LREEs) and heavy REEs (HREEs). The enrichment is attributed to secondary Al-rich mineral phases associated with the aquifer and dissolution by acidic water of Fe rich inorganic particulates and/or Fe-rich surface coating on particulates. The source of the REE signatures is related to the rocks of the adjoining areas based on similar Ce anomaly pattern in the groundwater and the source rocks.