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Cyanide Removal from Aqueous Solution by Oxidation with Hydrogen Peroxide Catalyzed by Copper-Zinc Oxide Nanoparticles

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Abstract

This 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.

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Correspondence to Ahmed Reda Yeddou.

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Boutrif, A., Chergui, S., Halet, F. et al. Cyanide Removal from Aqueous Solution by Oxidation with Hydrogen Peroxide Catalyzed by Copper-Zinc Oxide Nanoparticles. Water Air Soil Pollut 235, 471 (2024). https://doi.org/10.1007/s11270-024-07298-9

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  • DOI: https://doi.org/10.1007/s11270-024-07298-9

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