Open Access Research Article

Degradation of Synthetic Agro wastewater (Fipronil) using Electro Coagulation Process by Iron Electrodes

Ramya Thangamani1, Karthikeyan Velayutham2, Thanarasu Amudha2, Anuradha Dhanasekaran3, Sivanesan Subramanian*1

Environmental Engineering Laboratory, Department of Environmental Sciences, Bharathiar University, Coimbatore, India.

Department of Applied Science & Technology, Alagappa College of Technology, Anna University, Chennai, India.

Department of Biotechnology, Anna University, Chennai, India.

Corresponding Author

Received Date: October 29, 2018;  Published Date: November 21, 2018


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/cm2, 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.

Keywords: Fipronil; Phenylpyrazoles; COD; Fluoride; Chloride; pH7; Iron electrode; Pesticide; Degradation; GC-MS

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