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oai:docta.ucm.es:20.500.14352/939692025-09-18T12:11:30Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Domínguez Torre, Carmen María author Oturan, Nihal author Romero Salvador, Arturo author Santos López, Aurora author Oturan, Mehmet A. author 2018 This study focuses on the effect of electrode materials on abatement of lindane (an organochlorine pesticide) by electrooxidation process. Comparative performances of different anodic (platinum (Pt), dimensionally stable anode (DSA) and boron-doped diamond (BDD)) and cathodic (carbon sponge (CS), carbon felt (CF) and stainless steel (SS)) materials on lindane electrooxidation and mineralization were investigated. Special attention was paid to determine the role of chlorine active species during the electrooxidation process. The results showed that better performances were obtained when using a BDD anode and CF cathode cell. The influence of the current density was assessed to optimize the oxidation of lindane and the mineralization of its aqueous solution. A quick (10 min) and complete oxidation of 10 mg L−1 lindane solution and relatively high mineralization degree (80% TOC removal) at 4 h electrolysis were achieved at 8.33 mA cm−2 current density. Lindane was quickly oxidized by in-situ generated hydroxyl radicals, (M(•OH)), formed from oxidation of water on the anode (M) surface following pseudo first-order reaction kinetics. Formation of chlorinated and hydroxylated intermediates and carboxylic acids during the treatment were identified and a plausible mineralization pathway of lindane by hydroxyl radicals was proposed. Dominguez, Carmen M., et al. «Lindane Degradation by Electrooxidation Process: Effect of Electrode Materials on Oxidation and Mineralization Kinetics». Water Research, vol. 135, mayo de 2018, pp. 220-30. https://doi.org/10.1016/j.watres.2018.02.037. 0043-1354 10.1016/j.watres.2018.02.037 https://hdl.handle.net/20.500.14352/93969 https://doi.org/10.1016/j.watres.2018.02.037 Lindane degradation by electrooxidation process: Effect of electrode materials on oxidation and mineralization kinetics