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September 10, 2025

Combined Effects of Electro-Coagulation and Electro-Oxidation on Pesticide Wastewater, Using Iron Electrodes and Studying Current Variation and Electrode Gap

Key Points

The combined electrocoagulation and electro oxidation method significantly reduces chemical oxygen demand and organic pollutants.
Electrocoagulation achieves reductions in suspended particles within 45-60 minutes, but stable compounds persist.
Electro oxidation further degrades pollutants and requires longer treatment, especially for colloidal particles.
Iron electrodes effectively enhance pollutant removal across various treatment conditions, indicating strong performance.

Abstract

This study explores the combined use of Electrocoagulation (EC) and Electro oxidation (EO) to removal of persistent organic compounds from industrial wastewater, focusing on pesticide wastewater. The EC process efficiently removes colloidal and suspended particles within 45-60 minutes, achieving significant reductions in Chemical Oxygen Demand (COD), although some stable organic compounds remain. The EO process further breaks down these organic pollutants, reducing COD, Biochemical Oxygen Demand (BOD), Total Suspended Solids (TSS), pH, and iron concentrations, but requires more time, especially for colloidal particles. The hybrid EC-EO method first utilizes EC to eliminate charged species and then applies EO to degrade the remaining organic compounds, leading to the effective reduction of various pollutants within approximately one hour. The results indicate that iron electrodes were particularly effective in removing pollutants under different treatment conditions. The combined EC-EO treatment method demonstrates significant potential for the efficient treatment and separation of contaminants in industrial wastewater, offering a promising solution for improving water quality and reducing environmental pollution

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