Browsing by Author "Ould-Dris, Aïssa"
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Item Cyanide Removal from Aqueous Solution by Oxidation with Hydrogen Peroxide Catalyzed by Copper-Zinc Oxide Nanoparticles(Springer Nature, 2024) Boutrif, Abderrahamane; Chergui, Salima; Halet, Farid; Chergui, Abdelmalek; Boudriche, Lilya; Ould-Dris, Aïssa; Nadjemi, Boubekeur; Yeddou, Ahmed RedaThis 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.Item Removal of cyanide from aqueous solutions by adsorption on activated carbon prepared from lignocellulosic By-products(Taylor & Francis, 2015) Halet, Farid; Yeddou, Ahmed Réda; Chergui, Abdelmalek; Chergui, Salima; Nadjemi, Boubekeur; Ould-Dris, AïssaItem Removal of cyanide in aqueous solution by oxidation with hydrogen peroxide in presence of activated alumina(Taylor and Francis, 2015) Chergui, Salima; Yeddou, Ahmed Réda; Chergui, Abdelmalek; Halet, Farid; Amaouche, Hamza; Nadjemi, Boubekeur; Ould-Dris, AïssaItem Removal of cyanide in aqueous solution by oxidation with hydrogen peroxide in presence of activated carbon prepared from olive stones(Elsevier, 2010) Yeddou, Ahmed Reda; Nadjemi, Boubakeur; Halet, Farid; Ould-Dris, Aïssa; Capart, RichardItem Removal of cyanide in aqueous solution by oxidation with hydrogen peroxide in presence of copper-impregnated activated carbon(Elsevier, 2011) Yeddou, Ahmed Reda; Chergui, Salima; Chergui, Abdelmalek; Halet, Farid; Amaouche, Hamza; Nadjemi, Boubekeur; Ould-Dris, Aïssa; Belkouch, Jamal