Mechanism and Kinetic Analysis of the Degradation of Atrazine by O-3/H2O2

In phosphate buffer, the degradation of ATZ by ozone/(O-3/H2O2) under various circumstance was explored and the degradation mechanism and dynamics were probed. The findings revealed that when maintaining the reaction temperature at 25 degrees C, the H2O2 concentration and the O-3 concentration were 20 mol/L and 20 mol/L, respectively. Moreover, the degradation rate of 5 mol/L ATZ under the influence of O-3/H2O2 was 92.59% in phosphate buffer at pH7. The mechanism analysis showed that HO center dot and O-3 underwent co-oxidized degradation and that the HO center dot and O-3 oxidation degradation ratios were close to 1:1 under acidic conditions. Furthermore, HO center dot oxidative degradation dominated the ATZ degradation process. The kinetics analysis showed that the ATZ kinetics of O-3/H2O2 degradation were more compatible with quasi-second-order reaction kinetics under different temperatures, pH values, and H2O2 concentrations.