Possibilities of treatment and utilization of sludges from desulphation of mine waters

Abstract

In this contribution problems of sludges produced during the desulphation process of mine waters is solved, developed in the Institute of Environmental Engineering, Faculty of Mining and Geology, VSB-TU Ostrava. The sludge comes from chemical precipitation of sulphate ions during their reaction with a combination of ions Ca2+, Al3+, OH-, AlO2-. The laboratory tests were done on the mine water samples from the locality of the pit Jiří, Sokolovská uhelná, právní nástupce a.s.. These waters are loaded by a high concentration of sulphate ions (1 100 mg.l-1) and low pH (2,8). The first part was specialized on testing of efficiency of the desulphation method of IEI-HGF, VSB-TU. The next part was focused on a possibility of utilization of the sludges as donors of aluminium ions, repeatedly usable in the process of desulphation.