Boutrif, AbderrahamaneChergui, SalimaHalet, FaridChergui, AbdelmalekBoudriche, LilyaOuld-Dris, AïssaNadjemi, BoubekeurYeddou, Ahmed Reda2024-07-042024-07-042024https://doi.org/10.1007/s11270-024-07298-9https://link.springer.com/article/10.1007/s11270-024-07298-9https://dspace.univ-boumerdes.dz/handle/123456789/14181This work is concerned with the cyanide removal from aqueous solution by oxidation with hydrogen peroxide H2O2 catalyzed by copper zinc oxide (CuO-ZnO) nanoparticles prepared by co-precipitation method. The influences of catalyst dose, hydrogen peroxide concentration, temperature, and catalyst stability on cyanide removal were examined. The use of CuO-ZnO nanoparticles made it possible to increase the reaction rate, thus showing good catalytic activity. The cyanide removal percentage was increased after 75 minutes of reaction time from 70% to 100% by raising the catalyst dose from 0.25 g/L to 1.0 g/L. Increasing the temperature from 24 °C to 35 °C enhanced cyanide removal rate, the apparent activation energy was then found to be equal to 48 KJ/mol. The nanocatalyst was used again for four successive times and exhibited good stability. The kinetics of cyanide elimination was found to be pseudo-first order with respect to cyanide.enCyanide removalOxidationPeroxide hydrogenCatalystCuO-ZnO nanoparticlesKineticsArticle