Kombinierter Natrium- und Chloridaustausch als Vorstufe der Membranentsalzung von Wasser Sodium-Chloride Ion Exchange of Water before Membrane Demineralization

The possibility of using sodium-chloride ion exchange for water pretreatment before membrane demineralization was studied. The parameters of the water obtained are: permanganate oxygen demand, lower than 1.0 mg O₂/dm³; MF_0.45, lower than 150 s; amount of total iron, lower than 50 μg/dm³. This water meets the requirements for all reverse osmosis and electrodialysis membranes.