Experimental study of microwave-catalytic oxidative degradation of COD in livestock farming effluent by copper-loaded activated carbon

Abstract

AbstractCuO/granular activated carbon (GAC) catalysts were prepared in this work and used as heterogeneous catalysts for the degradation of chemical oxygen demand (COD) in the microwave (MW)-induced H2O2catalytic oxidation process. The prepared catalysts were characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDS), X-ray diffraction (XRD), and N2adsorption-desorption techniques. The results showed that CuO was loaded on the GAC surface. Subsequently, the effects of catalyst dosage, H2O2dosage, pH, MW power, and MW irradiation time on the degradation efficiency were studied. The orthogonal experiment showed that the initial PH value had the greatest effect on COD removal rate in the microwave-assisted reaction system with CuO/GAC as catalyst.The COD was degraded quickly and efficiently by the combined method of MW/catalyst/H2O2, and the mechanism of microwave catalytic oxidation and H2O2degradation of farm wastewater COD was discussed.