Removal of N,N methylene-bis-morpholine pollutant in water by advanced oxidation process "electro-Fenton"

This study discusses the degradation of biocide solution containing N,N Methylene-bis-morpholine by electro-Fenton process. Hydrogen peroxide (H2O2) was produced by electro-reduction of oxygen dissolved in a diluted acid solution containing the supporting electrolyte. This oxidation process allows the production of active intermediates, which react on the organic compounds, leading to their mineralization. The independent current parameters, Fe3+ concentration, in the range (0.3-2.77)mA/cm(2) and (2.8-224)mg/L, respectively, were evaluated. Other parameters related to optimization of generation of hydrogen peroxide were explored, such as the optimal cathodic potential, electrolysis/aeration time, the concentration of supporting electrolyte, and effect of pH, and investigated to find the best experimental conditions for achieving generation of oxidant (H2O2) in situ. Results showed that potential of -500mV/ECS, 0.05M Na2SO4 electrolyte, O-2 sparging during 2h, and pH 3 were the best conditions for production of the hydrogen peroxide. After optimizing the operational parameters such as Fe3+ concentration of 28mg/L and current density of 1.4mA/cm(2), the mineralization of N,N Methylene bismorpholine was of 97% efficiency after 6h to treatment.