Mechanism study on a novel Cu/Fe co-catalyzed heterogeneous particle mediated activation of hydrogen peroxide for efficient degradation of cyanides

The degradation of cyanide ions in cyanide containing wastewater is a major challenge in water treatment . This article uses a one-step hydrothermal method to prepare iron copper bimetallic oxide catalysts and applies them for the rapid degradation of cyanide (CN − ). The experimental results show that under the optimal conditions, the removal rate of CN − in the bimetallic catalyst/H 2 O 2 system is close to 100 % within 1 h, which is significantly better than the single metal oxide catalyst. Through characterization by SEM-EDS, XRD, XPS, and combined with catalytic performance experimental analysis, it was found that. There is a synergistic effect between Cu and Fe, which can effectively promote the cycling of metal ions and improve the generation efficiency of hydroxyl radicals (HO • ) to a certain extent, thereby improving the degradation performance of CN − . In addition, ion chromatography was used to analyze the oxidation products and a possible pathway for CN − degradation was proposed. This provides new insights and ideas for the development of high-performance bimetallic oxide catalysts for cyanide degradation.