Photodegradation of natural estrogen by heterogeneous Fenton reaction

• 1、Department of Environmental Science，East China Normal University，Shanghai （200062）

Abstract：The photodegradation of natural estrogen 17β-estradiol (E2) by novel heterogenerous Fenton catalyst was investigated as a function of E2 concentrations, organic co-solvents, co-existing estrogens and pH. The degradation kinetic was fitted to Langmuir-Hinshelwood model. The removal kinetics of E2 were initiated by a rapid decay and then followed by a much slower one in acetonitrile-water solutions, while in methanol-water solutions it followed the first-kinetic model for the diffusion-controlled of hydroxyl radicals and competition between E2 and co-solvents. The lower level of co-existing estrogens didn’t significantly influence the oxidation efficiency of E2. The degradation rates of E2 depended on E2 concentrations, composition of co-solvents and pH. Thus this novel Fenton catalyst can efficiently eliminate E2 through heterogeneous Fenton mechanism.

keywords： Fenton like reaction；heterogeneous catalysis；17β-estradiol；co-solvent

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