HIGHLY EFFECTIVE ELECTRODIALYSIS FOR SELECTIVE ELIMINATION OF NITRATES FROM DRINKING-WATER

This paper considers a new and highly effective process for selective elimination of nitrates from drinking water through electrodialysis. I t is based on coupled use of a modified anion exchange membrane with a nitrate-selective anion exchange resin. The latter is placed in the d esalination compartment and constitutes a part of a new type of ion-co nducting intermembrane spacer. A highly preferential transport of nitr ate anions against chlorides and sulphates is observed to take place a t low current densities. The results obtained prove that electrodialys is is a practical solution to the problem of selective elimination of nitrates from drinking water.