Verfahren zur Reinigung von Bergbauwaessern

The invention relates to a process for cleaning waste water containing uranium, arsenic and radium compounds, in particular mine water, whereby uranium compounds are separated by means of a primary flocculator (PF), which is produced by means of an aminolysis of polyacrylnitrile containing hydroxylamine, whereby the following consecutive process steps are performed: a) adjusting the pH of the waste water to a value of < 6.2, b) precipitating the radium compound with a 0.5 percent to 15 percent solution of barium chloride, c) precipitating uranium compounds using a 0.5 percent to 2 percent solution of primary flocculator (PF), d) precipitating the arsenic compound using a 0.5 percent to 45 percent solution of FeCL<-3, e) separating the precipitate