FIELD: water treatment.
SUBSTANCE: invention relates to removing and decomposing nitrate ions contained in water, for example in ground water or in surface waters. Process consists in passing aqueous solution through electrochemical cell containing at least one anode and at least one cathode and passing electric current between them. Surface(s) of cathode is(are) covered with layer consisted of metallic rhodium. Aqueous solution is preferably aqueous solution, which was used for regeneration of ion-exchange column.
EFFECT: enhanced electrochemical cell efficiency.
18 cl, 3 ex
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