Document Type : Original Article
Department of Applied Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar, Iran
Department of Applied Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar , Iran
The use of catalysts to increase the efficiency of the ozonation process is known as the catalytic ozonation process that has been considered in recent years. The purpose of this study was to investigate the role of magnesium oxide in the degradation of acid red 8.colour (AR8) in the process of ozonation. Nanoparticles of magnesium oxide were prepared by sol-gel method and characterized by X-ray diffraction techniques (XRD), scanning electron microscopy (SEM), nitrogen adsorption and desorption, and infrared Fourier transform- Infrared Spectroscopy (FT-IR ). Color degradation studies were carried out in a semi-continuous reactor, and the results showed that nano magnesium oxide significantly increases the rate of degradation of AR8 color, so that during the same time (min 30) from ozone, the percentage of degradation of AR8 color from 60 % for ozonation only 98% for catalyst use. These results were obtained at optimal conditions of 5.7 pH = and a catalyst concentration of 22.86 mg / L and an initial concentration of 150 ppm of AR8.