Degradation of nitroaromatics (MNT, DNT AND TNT) by AOPs

Application of selected AOPs to degrade nitroaromatics (nitrotoluene, dinitrotoluene and trinitrotoluene) in wastewater discharged from the production of TNT has been investigated. The first stage of the experiments was devoted to test the extent of degradation and improvement in biodegradation of the pure nitroaromatics using different AOPs: ozone alone, O-3 + H2O2, O-3 + UV, and Fenton reaction (Fe2+ + H2O2) at the various experimental conditions (pH, ozone concentration in the inlet gas, presence of radical scavengers). In the second stage degradation of the industrial wastewaters has been examined. Simple ozonation and the Fenton oxidation process were found to be the most effective.