Degradation of Herbicide (Ametryn) in Water By UV-H2O2 Combinated Process

The removal performances of ametryn in drinking water using UV-H₂O₂ combinated process was investigated in this paper. The results showed that ametryn cannot be effectively removed by UV radiation and H₂O₂ oxidation alone, while UV-H₂O₂ combination process could achieve quite good removal efficiency. As the initial concentration of ametryn about 0.901 mg/L, its removal efficiency reached 97.68% under the condition that the intensity of UV radiation, the dosage of H₂O₂, reaction time, pH and residual concentration were 85.7 muW/cm2, 5 mg/L, 40 minutes, 7.0 and 0.021 mg/L, respectively. The kinetic effects of H₂O₂ dosage, pH values and ametryn initial concentration on the conversion of ametryn were examined respectively. Analysis of factors showed that UV radiation intensity, H₂O₂ dosage, pH values and ametryn initial concentrations have important effect on the degradation of ametryn.