Electrochemical Degradation of the Pesticide Dimethenamid-P at Gold, DSA Platinum and Ruthenium Oxide Electrodes in Different Electrolytes

Abstract

For the first time the electrochemical degradation of the pesticide dimethenamid-P was studied. Its direct electrochemical degradation, using potential cycling at a gold electrode, was performed by cyclic voltammetry and HPLC analysis of electrolyte after 72 h showed 56.8% of degradation. HPLC-MS indicates the formation of degradation products through the elimination of chlorine atom and C-N bond cleavage. By indirect electrolysis using DSA Ti/PtOx and DSA Ti/RuO2 electrodes during 30 minutes 87.2% and 88.3% of dimethenamid-P was degradated, respectively. The high percentage of degradation of dimethenamid-P was achieved with non time consuming, simple and cheap electrochemical processes.