Electrodialysis of coal mine water

Abstract The treatment of model solution resembling the coal mine water from the “Boleslaw Śmialy” coal mine in Łaziska Gorne, Poland, was investigated. Two cases were investigated: 1) electrodialysis is directly applied in concentration of coal mine water; 2) coal mine water is pre-concentrated in the NF-RO system and then fed to the electrodialysis. Based on the bench-scale experiments, a model describing ions and water transport across the ion-exchange membranes was established. The model predicted that it is possible to obtain saturated brine, but the coal mine water must be pre-concentrated in the NF-RO system before the electrodialytic treatment.