Abstract
Aqueous solutions of organophosphorus pesticides were completely mineralized via in-situ generated hydroxyl radicals (HO·) by the Electro-Fenton process. Formation of Fenton's reagent (H2O2, Fe2+) was carried out by simultaneous reduction of O2 and Fe3+ on carbon cathode in acidic medium. The electrochemistry combined with Fenton's reagent provides an excellent way to continuously produce the hydroxyl radical, a powerful oxidant. We demonstrate the efficiency of the Electro-Fenton process to degrade three organophosphorus insecticides: malathion, parathion ethyl and tetra-ethyl-pyrophosphate (TEPP). Degradation kinetics and removals of chemical oxygen demand (COD) have been investigated. Here we show that the mineralization efficiency was over 80% for three organophosphorus pesticides.
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Guivarch, E., Oturan, N. & Oturan, M.A. Removal of organophosphorus pesticides from water by electrogenerated Fenton's reagent. Environ Chem Lett 1, 165–168 (2003). https://doi.org/10.1007/s10311-003-0029-4
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DOI: https://doi.org/10.1007/s10311-003-0029-4