Journal de génie civil et environnemental

Assessment of Non-Corrosive Framing Material Layering for the Avoidance of Corrosive Mine Waste of Pyrite and Jarosite

Abstract

Bhara Thiraja

Epitome is a common strategy used to forestall possible corrosive mine seepage (AMD) in overburden heaps. To reduce water infiltration and/or oxygen diffusion through rock pores, Potentially Acid-Forming (PAF) material is covered with either Non-Acid-Forming (NAF) or alkaline material in this method. The thickness of the NAF material layer, as well as its physical and chemical properties, is crucial factors in the successful prevention of AMD. As a result, this study used laboratory-scale column leaching tests to evaluate the layering technique for NAF materials. NAF layers with a proportion of 25 and half were utilized to cover PAF material containing pyrite and parasite obtained from the mining regions, East Kalimantan. Over the course of 23 weeks, kinetic tests were used to examine the chemical and physical properties of leachate collected from samples of water that were watered on a weekly wet-dry cycle. The results indicated a trend toward higher pH values and lower concentrations of sulphate and metal in the leachate. This study demonstrates that NAF layering is a useful strategy for reducing or eliminating AMD generation.