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EN
Chemical components in groundwater from mine drainage or used in geothermal installations are a potential source of valuable minerals. At the Polish Geological Institute - National Research Institute, a study was carried out to identify the content of elements in mine waters, wells exploiting natural gas and oil as well as geothermal and therapeutic waters in Poland. The aim of the research was to recognize the concentration of potentially useful minerals in groundwater and the possibility of their recovery. It was the first project that focused on the recovery of elements from groundwater on a national scale in Poland. For this purpose, 67 sites were selected, in which 75 water samples were taken and the content of65 chemical components was determined. Then, the amount of minerals that could be recovered from mine waters and geothermal brines was calculated based on the amount of water pumped in each facility. The calculations involved the approximate efficiency and working time of the recovery installation. As a result of this research, it was found that the mine waters and geothermal brines in Poland contain resources of valuable elements in very different amounts. In more than half of the examined sites, the estimated resources of minerals are present in amounts that are not prospective. However, in 29 sites, mine waters and geothermal brines contain elevated concentrations of several elements, including - B, Br, I, K, Li, Mg and Mn. If they were successfully recovered, they could represent a potential additional income for the mining and geothermal industries. Dębieńsko Desalination Plant of mine waters in Upper Silesia is the most promising potential source of recovery of minerals from mine waters, where the total resources of minerals to be recovered from concentrated brine have been estimated as the highest. Rudna Copper Mine in Lower Silesia is in second place, with one of the highest resources and the largest amount of minerals to be recovered from groundwater. Other sites are: the SOLINO Salt Mine, “Olza” mine water collector, mine waters pumped from abandoned coal mines in the Upper Silesia (in Zabrze, Siemianowice Śląskie, Czeladź, Gliwice), and plants producing geothermal energy in Stargard, Pyrzyce and Bańska. Total amount of mineral resources that can be recovered from waters pumped from the most promising sites is over72 000 tonnes annually. Taking into account both the ecological aspect and the potential economic benefits of recovering minerals from mine waters and geothermal brines, it is necessary to continue the studies on the recovery of minerals from highly mineralized waters in Poland.
EN
A constant increase of nitrate ions (NO3-) concentrations (from ca. 10 to 400% in some wells within 1995-2005) is observed within the Major Groundwater Basin (MGWB) 326N exploited by the Water Supply and Sewerage Company in Czestochowa district. The verified fate and transport model allowed for determining concentrations and loads of NO3- introduced into groundwater within infiltrating precipitation, as well as scenarios of concentration changes until 2015 for diverse regimes of water extraction. From 6 considered scenarios, the most appropriate for the water intake Łobodno, is the extraction regime that will lead to the prognosed mean NO, concentration in 2015 of 44,0 mg/l (i.e. 91% of the concentration in 2005). In the case of the water intake Wierzchowisko, the most appropriate is the water extraction regime, for which the predicted mean NO, concentration is 59,3 mg/l (i.e. 102% of the concentration in 2005).
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