| 摘要 |
Ground-water containing nitrate is treated by contact with an ion-exchange resin, the exhausted resin is regenerated, and the spent regenerant (containing nitrate) is subjected to electrolysis, thereby reconstituting the regenerant. For example, regenerant is supplied from a tank 1 to an ion-exchange unit 2 from which spent regenerant is passed to an electrolytic cell 3. The reconstituted regenerant (e.g. sodium bicarbonate) can be recirculated to the ion-exchange resin. |
