Fe-Cu aluminosilicate catalytic materials for oxidation of azo dyes

Abstract

Fe-Cu aluminosilicate materials were obtained by replacing exchangeable cations of bentonite clay with polymer hydroxocations of iron and copper. The specific surface and porosity characteristics of the synthesized materials were determined using low-temperature nitrogen adsorption. It was established that modifying clay with iron and copper complex compounds and heating at 400 °C and 500 °C led to the formation of microporous materials with a specific surface area of 140-152 m2.g-1. The catalytic properties of Fe-Cu aluminosilicate materials were studied in the oxidative degradation reaction of a diazo dye “direct pure blue” in aqueous solutions using hydrogen peroxide as oxidizing agent. It was shown that the materials were active catalysts for the dye oxidation and increased oxidation efficiency to 78-96% for 360 min at 40 °C. The results of the research allow to conclude that obtained Fe-Cu-aluminosilicate materials can be successfully used in the catalytic treatment of wastewater from organic dyes.