Synergetic oxidation of nitrobenzene in ground water and its kinetics

Based on the experiment of KMnO₄/O₃ to oxidize nitrobenzene (NB) with low concentration in ground water, this test analyzed the reaction kinetic rules of NB degradation and showed that the compound potassium permanganate/ozone(KMnO₄/O₃) have strong synergetic oxidation effect. KMnO₄ can induce O₃ to decompose and produce a large amount of active groups of hydroxyl radical (-OH), improving the degradation efficiency of NB of compound KMnO₄/O₃ greatly compared with separate O₃ and KMnO₄. Under the three different technique conditions, all accorded with the apparent first-order kinetic reaction and the rate constant enhancement factor of NB degradation reached 1.48. At reacting time of 12 minutes, when adding 1.0 mg/L O₃ and 0.8 mg/L KMnO₄, the removal rate of compound KMnO₄/O₃ oxidation depredating NB in ground water reached above 95.3%.