The Effect of pH on Stability of an Isolation Barrier Made of Dolomite Post-Floatation Waste

Dolomite post-floatation waste has been proposed as an alternative material for the construction of separation barriers. The aim this study was to determine effect pH leaching solutions on stability such present research included determination selected physical and chemical properties waste, i.e., density, grain composition, filtration coefficient. Column tests by different values modeling varying environmental conditions were performed. Selected ions determined in eluates. Grain analyses carried out column after changes composition dolomite due washing with solutions. value coefficient is 6.52 × 10−9 m∙s−1, which confirms impermeability waste. fine-grained, a diameter d ≤ 200 µm. During leaching, decrease content analyzed grains their movement down barrier, resulting its sealing, observed. central part all columns showed more 7 μm, probably secondary precipitation CaSO4. Irrespective initial solution, reaction eluates obtained slightly alkaline (pH 7.52–8.20). that ensure tightness durability which, combined ability alkalize sealing process, ensures effectiveness.