Study on the Degradation of Microcystins MC-LR with the Method of Fenton Oxidation

[Objective] The efficiency of the Fenton oxidation on the degradation of microcystins MC-LR in slightly polluted water was analyzed.[Method] The experiment in the effect of the Fenton oxidation on the degradation of MC-LR in slightly polluted water was conducted and the concentration of H2O2 and Fe2+-adding,the pH value,the initial concentration of microcystin,the reaction time and others affecting the degradation effect was measured.Meanwhile,the related factor related to the process of Fenton oxidation degrading MC-LR in water was also discussed.[Results] The optimal condition was the initial concentration of H2O2 was 0.30 mmol/L,the molar ratio of [H2O2]/[FeSO4] was 30∶1,the pH value was 4.0,the reaction temperature was(24±2)℃ and the reaction time was 60 minutes while the concentration of microcystin MC-LR was 0.31 mg/L,so that the removal rate of MC-LR was 90.30%.[Conclusion] The microcystin MC-LR could be effectively degraded through the Fenton Oxidation under certain condition.