Use of brown coal ash for the amelioration of dump soils
Since the mid-1950s brown coal filter ash has been systematically used to ameliorate the soil, in particular Tertiary dumped substrates otherwise bare of vegetation. In conjunction with a partial project the long-term effects of the ash to the soil were examined. From the results obtained it can be estimated that as regards the aspects of soil science, soil productivity and seepage waters from dump areas ameliorated with ash no detrimental effects are produced as compared with soils ameliorated with lime – in fact, quite the contrary. The substitution of natural lime has advantages but is however limited by transportation distance. In each individual case the basic amelioration of dumped soils with ash must be approved in accordance with the development plan licensing procedure stipulated by the mining law.