Oxidation of the pesticide atrazine at DSA electrodes

Journal of Hazardous Materials
Geoffroy R P MalpassArtur J Motheo

Abstract

This paper presents the study of the electrochemical oxidation of the pesticide atrazine at a Ti/Ru(0.3)Ti(0.7)O(2) dimensionally stable anodes (DSA). The effect of using different supporting electrolytes (NaCl, NaOH, NaNO(3), NaClO(4), H(2)SO(4) and Na(2)SO(4)) during the galvanostatic electrolysis of atrazine was investigated. It was observed that the removal of atrazine and total organic carbon (TOC) was only achieved at appreciable rates when NaCl was used as the supporting electrolyte, due to the oxidising species formed in this electrolyte (e.g. ClO(-)). Variation of the NaCl concentration demonstrated that, although only low concentrations of NaCl are necessary to result in the complete removal of atrazine in solution, TOC removal is almost linearly dependent on the quantity of NaCl in solution. Examination of the applied current density indicates that the efficiency of TOC removal reaches a maximum at 60 mA cm(-2). Testing of alternative electrode materials containing SnO(2) did not improve the efficiency of atrazine removal in Na(2)SO(4), but in NaCl a small increase was observed. Overall there appears to be no great advantage in using SnO(2)-containing electrodes over the Ti/Ru(0.3)Ti(0.7)O(2) electrode.

References

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Citations

Jul 11, 2013·Environmental Technology·Geoffroy R P MalpassArtur J Motheo
Dec 25, 2013·Environmental Science & Technology·Andrii ButkovskyiGrietje Zeeman
Jul 26, 2014·Chemosphere·Juliana R SteterArtur J Motheo
Feb 11, 2016·Journal of Environmental Management·F L SouzaP Cañizares
Nov 21, 2007·Journal of Hazardous Materials·M MurugananthanT Shirakashi
Oct 13, 2007·Journal of Hazardous Materials·Carla Regina CostaPaulo Olivi
Mar 28, 2016·Chemosphere·E Vieira dos SantosM A Rodrigo
May 24, 2015·Environmental Science and Pollution Research International·Sajjad HussainArtur J Motheo
Sep 7, 2016·Environmental Science & Technology·James M BarazeshDavid L Sedlak
Oct 31, 2017·Environmental Technology·Raissa AntonelliGeoffroy Roger Pointer Malpass
Oct 21, 2017·Environmental Technology·Camila Ferreira PintoGeoffroy Roger Pointer Malpass
Aug 9, 2008·Water Environment Research : a Research Publication of the Water Environment Federation·Richard J WattsAmy L Teel
Jul 28, 2016·Environmental Science and Pollution Research International·Joaquín R DomínguezEduardo M Cuerda-Correa
Aug 8, 2009·Chemical Reviews·Marco Panizza, Giacomo Cerisola
May 1, 2010·Journal of Hazardous Materials·Geoffroy R P MalpassArtur J Motheo

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