USING NANO - SIZED CATALYTICAL MATERIAL OF ZnO IN THE OZONATION PROCESS FOR REMOVING ACID ORANGE II

Abstract

Sustainable development with green technology and management is appreciated in the 21st
century. Advanced oxidation processes (AOPs) are considered as one of the green ways towards a
sustainable future when using advanced materials to enhance the AOPs for complete pollutant
treatment. The ozonation process using nano sized catalytical material of ZnO and investigation of
the effect parameters such as initial pH, ZnO nanocatalyst concentration for removing different dye
concentrations of acid orange II (AOII) have been presented through batch experiments in this study.
The obtained results showed that the synergetic effect of ozone process and nanomaterial of ZnO for
removal of AOII was investigated with optimal conditions. Hence, the highest AOII degradation
efficiency with conditions at initial pH of 10.71; initial ZnO nanocatalyst concentration of 100mgL-1,
initial ozone concentration of 9.47mgL-1 for removal of the initial AOII concentration at 100ppm get
51.4% of the dye efficiency and COD efficiency of 43.7% for removal of AOII during 60 minutes of the
batch experiments. Thus, this investigation demonstrated that the contribution of nano ZnO as
catalyst to enhance the removal efficiency was appreciated by improvement of OH° generation for
removing AOII in operational conditions.