Heterogeneous catalytic ozonation of organic wastewater by using bimetallic catalysts supported on honeycomb‐structured activated carbon

Abstract Honeycomb‐structured activated carbon (HAC) is one of the most studied chemicals with large specific surface area, high porosity, unique adsorption properties, and other characteristics, which has been widely used in the fields of exhaust gas adsorption, wastewater adsorption, and catalyst support. However, the study and application of HAC in the field of wastewater treatment is not extensive. Herein, a novel HAC‐based bimetallic catalyst was prepared by incipient wetness co‐impregnation, which exhibited high catalytic activity in heterogeneous catalytic ozonation of methylene blue (MB) organic wastewater. A high MB removal of 95.43% and a chemical oxygen demand (COD) removal of 85.19% were achieved by using Cu‐La/HAC under optimized conditions. The inductively coupled plasma‐mass spectrometry (ICP‐MS) results showed that the metal dissolution concentration of Cu‐La/HAC was the lowest. Moreover, X‐ray photoelectron spectroscopy (XPS) characterization of copper‐containing catalysts indicated that the strong interaction between copper and lanthanum resulted in the low metal dissolution concentration.