Simulation of the effects of geochemical reactions on groundwater quality during planned flooding of the Koenigstein uranium mine, Saxony, Germany

Uranium mining in southeastern Germany resulted in significant environmental risks. Closure of the mines and subsequent rises of water levels may result in heavy-metal and radionuclide-bearing mine waters penetrating aquifers that are used for water supply. While there are certain (geo-)technical co...

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Veröffentlicht in:Hydrogeology journal 1999-06, Vol.7 (3), p.284-293
Hauptverfasser: Biehler, Daniel, Eberhard Falck, W
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description Uranium mining in southeastern Germany resulted in significant environmental risks. Closure of the mines and subsequent rises of water levels may result in heavy-metal and radionuclide-bearing mine waters penetrating aquifers that are used for water supply. While there are certain (geo-)technical constraints on the schedule with which flooding of the mines can proceed, this process must not result in aggravating the problem of metal release. Evaluation of the likely 'natural' geochemical situation of Koenigstein mine after mining has ceased, and different scenarios for the release of metals indicates that rapid flooding, albeit avoiding unnecessary aeration of the waters, is likely to result in reducing conditions and consequently low U-solubilities.Original Abstract: L'exploitation miniere d'uranium dans le sud-est de l'Allemagne est responsable de risques environnementaux significatifs. La fermeture des mines et la remontee consecutive du niveau de l'eau peuvent permettre a des eaux des mines riches en metaux lourds et en radionucleides de penetrer dans des aquiferes captes pour l'alimentation. Alors qu'il existe certaines contraintes geotechniques sur le programme de remplissage des mines, la procedure a suivre ne doit pas conduire a une aggravation du probleme de la mobilisation des metaux. L'evaluation de la situation geochimique naturelle vraisemblable de la mine de Koenigstein apres sa fermeture et les differents scenarios pour la mobilisation des metaux indiquent que le remplissage rapide, bien qu'il evite l'aeration non necessaire des eaux, doit vraisemblablement produire des conditions reductrices et par consequent de faibles solubilites de l'uranium.
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subjects Aquifers
Flooding
Geochemistry
Groundwater
Mines
Mining
Simulation
Uranium
title Simulation of the effects of geochemical reactions on groundwater quality during planned flooding of the Koenigstein uranium mine, Saxony, Germany
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