Nasser M Abu Ghalwa and Nader B Farhat
The present study deals with removal efficiency of the pesticide fenamiphos and chemical oxygen demand (COD) from aqueous solution by electrocoagulation method. The effects of initial pH, current density, initial pesticide concentration, salt concentration, usage of different electrolytes and temperature on the removal efficiency and COD have been investigated. The obtained results showed that fenamiphos and COD removal were 97.4% and 96.4% by using C with SS (Carbon as the anode and stainless steel as the cathode) at 60 min and were 90.3% and 88.2% by using SS with Ti (stainless steel as the anode and titanium as the cathode) at the same time. These electrodes provided a higher oxidation rate, higher current efficiency, high over potential and consume less electrical energy. The experimental data were fitted with several adsorption isotherm models to describe the electrocoagulation process. This study has been carried out to determine the feasibility of fenamiphos adsorption on carbon and stainless steel species by EC process using the Langmuir and Freundlich Isotherm. In addition, results for the fenamiphos removal kinetics at various effects show that the kinetic rates conformed to the pseudo first order kinetic model with good correlation using both electrodes.
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