ACIDIC-WASTEWATER TREATING MATERIAL AND METHOD OF TREATING ACIDIC WASTEWATER

摘要

This invention relates to a method for treating acidic waste water,particularly mine effluent, and to a solid waste water treating materialuseful for the method. This waste water treating material is obtained bysolidifying a mixture of rock wool and an inorganic binder mainlycontaining at least one kind selected from silicates, hydroxides and oxidesof alkaline earth metals and alkali metals and has a porosity of 50% ormore. When brought into contact with acidic waste water containing ironions and sulfate ions, this waste treating material can not only neutralizethe waste water but also remove harmful heavy metals such as iron andarsenic. Furthermore, it is easy to dispose the spent waste water treatingmaterial.