Sulu çözeltide pestisitlerin elektrokimyasal yöntemlerle giderilmesi

The removal efficiency of three pesticides: Bromuconazole, bentazone, and abamectin from model solution using electrocoagulation, electrochemical-Fenton and electro-oxidation processes have been investigated. The effects of operational parameters such as current density, support electrolyte concentration, electrode types and H2O2 concentration on the pesticide and COD removal efficiency have been studied. The initial concentration of pesticide was 300, 300, 4.5 mg/L for bromuconazole, bentazone and abamectin respectively. The result showed that the highest removal efficiency of bromuconazole was 92.22% recorded at 20 mA/cm2 by using electro-oxidation process with energy consumption of 40.91 kWh/m3. The removal of bromuconazole exhibited a pseudo-second-order reaction with rate constant 0.0009 mg-1Lmin-1. The maximum removal efficiency of bentazone was 91.18% indicated at 20 mA/cm2 by using electro-oxidation process with energy consumption of 57.63 kWh/m3. The removal of bentazone exhibited a pseudo-first order reaction with rate constant 0.0462 min-1. The highest removal efficiency of Abamectin was 90.69 % indicated at 20 mA/cm2 by using electro-oxidation process with energy consumption of 65.37 kWh/m3. The removal of Abamectin exhibited a pseudo-first order reaction with rate constant 0.0379 min-1. degradation of pesticides with electrochemical methods led to the formation of intermediate species Some of these species were detected by Ion chromatography (IC). The mineralization of pesticides and reduction of their toxicity were also investigated with the Microtox test. Keywords: Pesticides model wastewater, Electrochemical methods, Intermediate compound, Removal efficiency.