Electrochemical Degradation of Herbicidal and Pure 2,4-Dichlorophenoxy Acetic Acid on Pb/PbO₂ Modified Electrodes

Abstract

Lead/lead oxide Pb/PbO₂ modified electrodes was prepared for electrocatalytic oxidation of agrochemicals including herbicidal 2,4-D (albar super) and pure 2,4-dichlorophenoxy acetic acid. The results of electrocatalytic oxidation process of the agrochemical solutions were expressed in terms of the remaining concentration and COD removal. The different operating conditions of treatment process were investigated including current density, pH, temperature, time of electrolysis, type of conductive electrolyte, and its specific conductance. This electrode gives good results for the removal of agrochemicals and COD. Also, the results showed the best conductive electrolytes is NaCl. This observation was attributed to the small size of Na⁺ and contribution of Cl⁻ ion in formation of OCl⁻.

Keywords:

• Electrocatalysis
• electrode
• electrodeposition
• electrooxidation
• 2,4-dichlorophenoxyacetic acid
• lead dioxide