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History of exploitation of gold from Danube river sandy gravels is centuries long. Interesting on it continues to the 1970?s. Extaction of heavy minerals (HM) concentrate was never intend. About 1 milion m3 of sandy gravels is exloited in Slovak part of Danube basin for construction usage. Production of HM concentrate with gold as by-product can improve economy of exploitation. With average content 6,55 kg of HM in m3 of sandy gravels there is possibility to produce about 6500 t of HM concentrate with up to 30 kg ...

Following mining and processing activity, results a significant amount of mining wastes, in the form of sterile mineral. These wastes are stored largely in mining tailing ponds or heaps. The chemical composition of the sterile material depends from one mining site to another. For long time worldwide, tailing deposits were considered waste deposits, without the possibility of future use. A few of the negative effects on the environment my constructing and exploiting mining tailing ponds, heaps, landfills, are the d...