Catalysts based on NaY zeolite for oxidative destruction of organic azo dyes in wastewater

Abstract

Samples of catalysts containing Ag+ and Co+2 cations were prepared on the basis of NaY granulated synthetic zeolite without binders by the ion-exchange method with the subsequent thermal treatment at 350–500°C. It was found that CoNaY samples are most catalytically active in the process of carmoisine oxidation by hydrogen peroxide in a weak alkaline medium (pH 8.5).