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Comparison Between the Classical and the Electrochemical Fenton Systems for Atrazine Degradation in Acidic Medium

Abstract The degradation of chemicals in water is commonly performed using chemical oxidation. In case of refractory compounds, hydroxyl radicals have to be involved for their degradation. Several systems may be used to generate OH°, such as the ferrous iron-hydrogen peroxide system (Fenton’s reagent). However, when this reagent is prepared by mixing the two constituents, the oxidation of an organic compound is difficult to control and the ferrous iron regeneration is limited. So, very recently, electrochemical systems have merged that allow the electrochemical production of ferrous iron and/or hydrogen peroxide, thereby allowing the generation of OH°. In this paper, the efficiency of a simple electro-Fenton system in degrading chemicals in acidic medium is shown. Atrazine was chosen as a model organic compound. In addition, the electrochemical system compared favorably with the classical Fenton’s reagent under similar conditions, as it allowed a more thorough oxidation of atrazine.