Preparation of Modified Mordenitem and Application in Processing Mine Drainage

Mine drainage is a widespread environmental problem associated with both working and abandoned mining operations, resulting from the microbial oxidation of pyrite in presence of water and air, affording a solution that contains toxic metal ions. The present study aimed at evaluating the use of low-cost modified mordenitem to remove heavy metals ions from mine drainage. We elucidate the important parameters (including the pH, temperature, contact time, particle size and dosage) responsible for the removal the heavy metal ions. In addition, selectivity of modified mordenitem for metal removal was, in decreasing order, Pb2+ > Cd2+ > Cu2+ > Zn2+. Based on these results, the use of these materials has the potential to provide improved methods for the treatment of mine drainage.