Disposal and reutilization of
bottom ash from power plant is one of the main problems in environmental conservation. The
activation and release process of major elements in
bottom ash was studied under leaching conditions. The experimental treatments were: bottom ash; the mixture of bottom ash and lime; the mixture of bottom ash, lime and
cattle manure as well as its different incubation periods. The experimental data indicated that the mixture of bottom ash with cattle manure remarkably decreased both pH values, and concentrations of Ca, Al, and Si, but increased EC and concentrations of K, Mg, Na, S, P and Fe in the leachate. Furthermore, the incubation treatment of the mixture greatly increased initial EC and concentrations of Ca, Mg, K, and S in the leachate. Within the first 2 volumes, the released soluble salts in leachate accounted for 29.1, 53, 71.8 and 78.2% of the total dissolved salts in Treatments 1 ( 4, respectively. Therefore, it may be suggested that the influence and impact of bottom ash application and disposal process on environment be effectively eliminated or reduced, if the mixture of bottom ash with the cattle manure or their compost is preliminarily leached before it is applied to farmland.