Electro-Fenton is an advanced oxidation process (AOP) that combines electrochemical methods with the traditional Fenton reaction. The process involves the in-situ generation of hydrogen peroxide (H2O2) and the catalytic conversion of H2O2 into hydroxyl radicals (•OH) using iron ions as a catalyst. These highly reactive radicals effectively degrade a wide range of organic pollutants in water and wastewater.