Wet Air Oxidation of Phenol,Nitrobenzene and Aniline in Wasterwater

Liquid-phase oxidation of aqueous solutions of phenol, nitrobenzene and aniline was studied employing oxygen as the oxidant.The influence of temperature (160～220 ℃) on wet air oxidation of these compounds was investigated.Phenol oxidation proceeds in two steps:an induction period during which little of the organic was oxidized, followed by a rapid reaction period during which most of the organic was destroyed,while for aniline, the removal rate is linear with the time.The order of the reactivity of these three compounds in fixed time is:phenolanilinenitrobenzene,which is correlated to their molecule structures and reaction models.