Phenol red degradation using a synergetic method (Electrochemical Oxidation with Ozone) in batch and continuous system

Abstract

The degradation of phenol red (as a model of phenolic contamination) in aqueous solution was studied coupling two advanced oxidation processes in batch and continuous mode. Using an ozonation process in batch mode only 5% of COD removal in 30 min, is obtained. Electrochemical oxidation process in batch mode with electrodes of diamond doped with boron (DDB) as anode and stainless steel as cathode, removes 31% of COD in 120 minutes However, when the processes are coupled in batch mode reach 13.7% of COD removal in 30 minutes. In other hand, electrochemical oxidation process (DiaClean® cell) in continuous mode removes 38.4% of COD in 120 minutes. Coupling ozone with electrochemical oxidation (DiaClean ® cell) in continuous mode, a 46% of COD removal is achieved in 30 minutes. Samples of this treatment were analyzed in an ionic chromatographic equipment, it was detected that the main products formed in the degradation of phenol red were acetate and fumarate.