Application of Anodic Oxidation in Diazinon Degradation

• Published in: Water, air, and soil pollution Vol. 233; no. 10
• Main Authors: Santos, Tayanara Menezes, Marques, Maria Nogueira, de Alsina, Odelsia Leonor Sanchez, Ferreira, Maria Eliana Camargo, Yamaguchi, Natália Ueda, Bergamasco, Rosângela, Cavalcanti, Eliane Bezerra
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01.10.2022; Springer; Springer Nature B.V
• Subjects: Agrochemicals; Anodizing; Aqueous solutions; Atmospheric Protection/Air Quality Control/Air Pollution; Boron; Climate Change/Climate Change Impacts; Current density; Degradation; Diamonds; Diazinon; Dimensional stability; Dimensionally stable anodes; Earth and Environmental Science; Electrochemical oxidation; Electrochemistry; Electrodes; Electrolytes; Energy consumption; Environment; Environmental monitoring; Fungicides; Hydrogeology; Insecticides; Organic carbon; Organophosphorus pesticides; Oxidation; Oxidation-reduction reaction; Pesticides; Sodium chloride; Sodium sulfate; Soil Science & Conservation; Total organic carbon; Water Quality/Water Pollution; Electro-Oxidation; BDD; Electrochemical Oxidation; Pesticide; Electrochemical Advanced Oxidation Process
• ISSN: 0049-6979; 1573-2932
• DOI: 10.1007/s11270-022-05895-0

Diazinon, an organophosphorus pesticide, widely used in agricultural activities, can be effectively degraded in aqueous solutions via advanced oxidation processes. Electrochemical oxidation is a promising technique for the degradation of recalcitrant organic micropollutants in water. Thus, this study evaluated the pesticide diazinon degradation by anodic oxidation. To carry out the experiments, a synthetic solution of diazinon was used, with an initial concentration of 40 mg L −1 . Two types of electrodes were evaluated, a dimensionally stable anode type, with RuO 2 –IrO 2 composition, and a boron-doped diamond (BDD) electrode. In addition, two supporting electrolytes (NaCl and Na 2 SO 4 ), the electrolyte concentration, current density and also energy consumption were evaluated. All configurations were able to promote the degradation of total organic carbon. The anodic oxidation for the degradation of diazinon was more efficient with the BDD electrode, reaching 97.5% of diazinon removal after 180 min with 25 mM of Na 2 SO 4 , a current density of 42 mA cm −2 and pH 3.