10.22376/ijpbs.2019.10.1.p1-12 Volume 4 Issue 4 2013 (October - December) Glass/Nb lessThan sub greaterThan 2 lessThan /sub greaterThan O lessThan sub greaterThan 5 lessThan /sub greaterThan and Nb/Nb lessThan sub greaterThan 2 lessThan /sub greaterThan O lessThan sub greaterThan 5 lessThan /sub greaterThan electrodes were prepared by electrodeposition and used as anodes for electrochemical degradation of chlorpyrifos (CPF) in aqueous solution. Different operating conditions and factors affecting the treatment process including current density, temperature, initial concentration of chlorpyrifos, pH, conductive electrolyte and time of electrolysis were studied and optimized. The best degradation occurred in the presence of NaCl (1gL lessThan sup greaterThan -1 lessThan /sup greaterThan ) as conductive electrolyte. After 30 min, nearly complete degradation of chlorpyrifos was achieved (94% and 82%) using G/Nb lessThan sub greaterThan 2 lessThan /sub greaterThan O lessThan sub greaterThan 5 lessThan /sub greaterThan and Nb/Nb lessThan sub greaterThan 2 lessThan /sub greaterThan O lessThan sub greaterThan 5 lessThan /sub greaterThan electrodes at pH 10.8. Higher degradation efficiency was obtained at room temperature (20-30 lessThan sup greaterThan o lessThan /sup greaterThan C). The optimum current density for the degradation of chlorpyrifos on both electrodes was (25 mAcm lessThan sup greaterThan -2 lessThan /sup greaterThan ). NASSER M. ABU GHALWA electrochemical degredation, chlorpyrifos, electrodes, electrocatalytic oxidation. 885-897