Removal of pesticide 2,4-D by conductive-diamond photoelectrochemical oxidation》.pdf

Applied Catalysis B: Environmental 180 (2016) 733–739 Contents lists available at ScienceDirect Applied Catalysis B: Environmental j o u rn al h omepage: w w w. elsev /locate/apc atb Removal of pesticide 2,4-D by conductive-diamond photoelectrochemical oxidation a b a ˜ b b,∗ F.L. Souza , C. Saéz , M.R.V. Lanza , P. Canizares , M.A. Rodrigo a Instituto de Química de São Carlos, Universidade de São Paulo, P.O. Box 780, CEP 13560-970 São Carlos, SP, Brazil b Department of Chemical Engineering, Faculty of Chemical Sciences Technologies, Universidad de Castilla—La Mancha, Campus Universitario s/n, 13071 Ciudad Real, Spain a r t i c l e i n f o a b s t r a c t Article history: In this work, the removal of pesticide 2,4-D by single photolysis, electrolysis with BDD anode and a Received 14 February 2015 combined UV irradiation—electrolysis is studied. Results demonstrate that although photolysis is com- Received in revised form 17 July 2015 pletely inefficient in the degradation of this pesticide, light irradiation improves significantly the results Accepted 24 July 2015 obtained by single electrolysis, leading to harsher oxidation conditions, which contribute to reduce the Available online 26 July 2015 number of intermediates and promote mineralization. Electrolysis with diamond electrodes can attain the complete depl