Aromatic Compounds Degradation In Water By Using Ozone And AOPs. A Comparative Study. O-Nitrotoluene As A Model Substrate

Abstract

Abstract O-Nitrotoluene lpar;C7H7NO2) was used as a model compound to study the oxidation of aromatic volatile organic chemicals. Bench-scale studies were conducted to assess the efficiency of ozonation (O3) and advanced oxidation processes (AOPs) such as O3/UV, O3/H2O2, UV/H2O2, and O3/UV/H2O2 for the treatment of o-Nitrotoluene as one of die benzene derivatives. Results of this study indicated that the direct reaction between o-Nitrotoluene and ozone resulted in a slow oxidation rate of o-Nitrotoluene and was pseudo first order. At higher pH, or by the combination of ozone with UV or H2O2 ozonation resulted in more efficient and faster oxidation rates of o-Nitrotoluene due to the participation of hydroxyl radicals in the oxidation of o-Nitrotoluene. Consistent results were observed for O3/UV and UV/H2O2 treatment. The reaction kinetics and mass transfer were also studied.