The geochemistry of rare earth elements (REE) in acid mine drainage from the Sitai coal mine, Shanxi Province, North China
The geochemistry of rare earth elements (REE) in acid mine drainage from the Sitai coal mine, Shanxi Province, North China
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DOI：
10.1016/j.coal.2006.01.009
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发表时间：
2007-04
影响因子：
5.6
通讯作者：
F. Zhao;Z. Cong;Hongfu Sun;D. Ren
中科院分区：
文献类型：
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作者：
F. Zhao;Z. Cong;Hongfu Sun;D. Ren
通过测定山西四台煤矿酸性矿井水（AMD）中溶解态稀土元素和主要溶质的含量、AMD沉淀物样品和围岩样品（泥岩和煤）中稀土元素的含量以及AMD中稀土元素的赋存形态，研究了AMD中稀土元素的地球化学特征。结果表明，与世界范围内的几个陆地沃茨相比，四台煤矿AMD具有较高的REE和SO 42 −浓度。稀土元素形态模拟表明，AMD中稀土元素主要以硫酸盐络合物（LnSO 4+，>60%）和游离态（Ln 3+，20%~ 40%）存在。四台煤矿的AMD也显示出中等稀土富集NASC（北美页岩复合）规范化模式。作者认为，四台煤矿AMD和煤系围岩中的稀土硫酸盐（LnSO 4+）可能是导致AMD中稀土富集的NASC标准化模式的原因。需要对AMD沉淀物进行进一步的研究，以获得更多关于中间稀土富集的NASC标准化模式起源的信息。
In this paper, geochemical characteristics of rare earth elements (REE) in acid mine drainage (AMD) from the Sitai coal mine of Shanxi Province, North China were investigated by determining concentrations of dissolved REEs and major solutes in the AMD samples, concentrations of REEs in the AMD precipitate samples and country rock samples (mudstone and coal), and modeling REEs species in the AMD. The results show that AMD in the Sitai coal mine have high REEs and SO42−concentrations in comparison with several terrestrial waters worldwide. The REE speciation modeling indicates that sulfate complexes (LnSO4+, >60%) and free metal species (Ln3+, 20%–40%) are dominant REEs species in the AMD. AMD of the Sitai coal mine also shows a middle REE-enriched NASC (North American Shale Composite)-normalized pattern. The authors suggest that both REE sulfates (LnSO4+) in the AMD and country rock of coal measures are possible reasons for middle REE-enriched NASC-normalized pattern of the Sitai coal mine AMD. Further work on the AMD precipitates is needed to obtain more information on the origin of the middle REE-enriched NASC-normalized patterns.