High frequency ultrasound enhanced oxidation of bisphenol a by Fenton-like systems

Abstract

High-frequency ultrasound was employed to enhance degradation of micropollutant Bisphenol A in a Fenton-like oxidative system involving persulfate as the oxidant and ferrous iron (Fe(II)) as the catalyst US/Fe2+/S2O82−. Experiments were carried out in a 400 ml glass reactor. The influence of the initial concentration of BPA, the ratio of “oxidizer-substrate”, the ratio of “catalyst-substrate”, temperature, on the efficiency of the oxidation of BPA was established. The reaction rates of micropollutant degradation increased in the order: {Fe2+/S2O82−}<{US}<{US/Fe2+/S2O82−}. It was shown that ultrasonic activated Fenton-like oxidative system leads to degradation of micropollutants. As a result, a method of deep degradation of toxic organic pollutants based on the ultrasonic activated – Fenton process US/Fe2+/S2O82− was suggested.