Optimizing Electro-oxidation, Electrocoagulation and Electro-Fenton processes for Treating Model Pesticide Wastewater containing Bromuconazole

Yusuf Yavuz; Mohammed Azeez OTHMAN

doi:10.21271/ZJPAS.33.1.15

Authors

Yusuf Yavuz Anadolu University, Dept. of Environmental Engineering, Turkey
Mohammed Azeez OTHMAN Anadolu University, Graduate School of Applied Sciences, Dept. of Environmental Engineering, Turkey

DOI:

https://doi.org/10.21271/ZJPAS.33.1.15

Abstract

In this work the removal efficiency of Bromuconazole and chemical oxygen demand (COD) from aqueous solution using different electrochemical processes (electro-oxidation process (EOP), electrocoagulation process (ECP) and electro- Fenton process (EFP) were investigated. All experiments were achieved at the natural pH of solution. The effects of some parameters such as current density and H₂O₂concentration on COD and pesticide removal efficiency have been carried out at an initial pH of ˷8.45, current density 5,10,15,20 mA/cm2, an initial pesticide concentration of 300 mg/L, 5mM Na₂SO₄ support electrolyte and temperature of 30^oC. The COD decrease at the end of 80 minutes of treatment from ˷1200 to 167.52 mg/L by EOP, to 248.26 mg/L by ECP, and to 237.94 mg/L by EFP. Results showed that a high COD reduction was obtained by EOP (85.59%), followed by EFP (80.48%) and electrocoagulation at (79.51 %) with a constant current density of 20, 20, 15 mA/cm²respectively. The removal of bromuconazole pesticide exhibited a pseudo-second-order reaction with rate constant 0.0009 mg^-1Lmin^-1. Moreover, energy consumption, the cost of degradation and sludge formation were also determined.

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