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Removal of organophosphorus pesticides from water by electrogenerated Fenton's reagent

Elodie Guivarch 1 Nihal Oturan 1 Mehmet A. Oturan 1 
1 Géomatériaux
G2I - Géomatériaux et géologie de l'ingénieur
Abstract : Aqueous solutions of organophosphorus pesticides were completely mineralized via in-situ generated hydroxyl radicals (HO(center dot)) by the Electro-Fenton process. Formation of Fenton's reagent (H(2)O(2), Fe(2+)) was carried out by simultaneous reduction of O(2) and Fe(3+) 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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Submitted on : Wednesday, May 2, 2012 - 3:42:50 PM
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Elodie Guivarch, Nihal Oturan, Mehmet A. Oturan. Removal of organophosphorus pesticides from water by electrogenerated Fenton's reagent. Environmental Chemistry Letters, Springer Verlag, 2003, 1 (3), pp.165--168. ⟨10.1007/s10311-003-0029-4⟩. ⟨hal-00693391⟩



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