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Comparison Study of Dimensionally Stable Anodes for Degradation of Chlorpyrifos in Water
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2014
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EngineeringDegradation ReactionChemistryWastewater TreatmentChemical EngineeringDimensionally Stable AnodesCorrosionWater TreatmentPhotocatalysisChemical Oxygen DemandAfm ImagesDrinking Water TreatmentElectrode Reaction MechanismElectrochemical Power SourceEnergy StorageWater QualityElectrochemical ProcessPhotodegradationElectrochemistryWater TechnologyTi/iro 2Environmental EngineeringMetal AnodeComparison Study
In the present study, two dimensionally stable anodes, Ti/IrO 2 and Ti/IrO 2 -SnO 2 , have been developed in order to degrade chlorpyrifos in chloride-free environment. The chemical oxygen demand (COD) results revealed that Ti/IrO 2 -SnO 2 electrode had degraded 78.2% of COD after 6 h of electrolysis. COD removal followed pseudo second-order kinetics. Radical scavenger studies confirmed that the hydroxyl radical can be the major factor responsible for degrading chlorpyrifos. The anodic charge decreased from 153.76 to 145.15 mC while accelerated lifetime showed 7 h increment, indicating the higher stability of Ti/IrO 2 - SnO 2 anode. The qualitative identification of oxides of both electrodes was studied by X-ray diffraction. Roughness parameters and topography were determined using AFM images.