Process Optimization and Characterization of Copper Oxide/Zeolite for Heterogeneous Catalytic Wet Oxidation of Dyeing Wastewater

Abstract

Waste coal fly ash was used, as a cheap and handy material, to synthesize zeolite.The synthesized zeolite was then taken, as a carrier, to load CuO by dipping method for heterogeneous catalytic wet oxidation of acid bright red GR wastewater. The optimal process parameters of CuO loading were determined by orthogonal test. The comparison of XRD patterns of zeolite and CuO/zeolite displayed that CuO was successfully loaded on the zeolite.The SEM morphology of CuO/zeolite revealed that the cotton shape structure with more loose surface of CuO/zeolite was obtained compared with the SEM morphologies of fly ash and synthesized zeolite. The experimental results of water treatment showed that high CODCr and chroma removal rates of 88.27% and 99.97% were achieved by the prepared CuO/zeolite sample,respectively.