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Title
Verfahren zur Reinigung von Bergbauwaessern
Date Issued
1995
Author(s)
Gohlke, U.
Otto, A.
Seidel, D.
Patent No
1993-4322663
Abstract
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.
Language
de
Patenprio
DE 1993-4322663 A: 19930707