Light Rare Earth Elements enrichment in an acidic mine lake (Lusatia,Germany) |
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| Institution: | 1. Sektion Gewässerforschung, Umweltforschungszentrum, Brückstraße 3a, D-39114 Magdeburg, Germany;2. Hydrosciences, Université Montpellier 2, F-34095 Montpellier, France;3. Sektion Analytik, Umweltforschungszentrum, Permoserstraße 15, D-04318 Leipzig, Germany;1. Technical Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India;2. Department of Physics and Astrophysics, Delhi University, Delhi 110007, India;3. Solid State Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India;1. Department of Physics, University of Pretoria, Pretoria 0002, South Africa;2. Department of Mathematics and Physical Sciences, Samuel Adegboyega University, Km 1 Ogwa/Ehor Rd, Ogwa, Edo State, Nigeria;1. Department of Geological Engineering, Firat University, 23119 Elazig, Turkey;2. M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of National Academy of Science, 03680 Kiev Ukraine;3. Department of Geology, Karazin National University, 61022 Kharkiv, Ukraine |
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| Abstract: | The distribution of Rare Earth Elements (REE) was investigated in the acidic waters (lake and groundwater) of a lignite mining district (Germany). The Fe- and SO4-rich lake water (pH 2.7) displays high REE contents (e.g. La～70 μg/l, Ce～160 μg/l) and an enrichment of light REE (LREE) in the NASC normalised pattern. Considering the hydrodynamic model and geochemical data, the lake water composition may be calculated as a mixture of inflowing Quaternary and mining dump groundwaters. The groundwater of the dump aquifer is LREE enriched. Nevertheless, the leachates of dump sediments generally have low REE contents and display flat NASC normalised patterns. However, geochemical differences and REE pattern in undisturbed lignite (LREE enriched pattern and low water soluble REE contents) and the weathered lignite of the dumps (flat REE pattern and high water soluble REE contents) suggest that lignite is probably the main REE source rock for the lake water. |
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