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Abstract

The electrocoagulation of fipronil (insecticide) contaminated wastewater by Iron anodes has been investigated. During the various stages of electrolysis, parameters such as COD, chloride ion concentration, Fluoride were examined and discussed. The maximum chemical oxygen demand (COD) removal efficiency 70 %, chloride 62%, fluoride 40% was achieved at pH 7, operated at the current density of 7.5 mA/cm 2 , electrolyte (NaCl) concentration of .1M and at 120 min of electrolysis using iron anode. A neutral pH showed the maximum reduction of COD compared with alkaline and acidic pH. Increase in current density and process time led to the increase in COD removal. The experimental results showed that the electrochemical oxidation process could effectively reduce the COD from the fipronil contaminated wastewater. The degradation of fipronil was analyzed and confirmed by GC-MS and intermediate produced during the process.