Removal of cyanide in aqueous solution by oxidation with hydrogen peroxide catalyzed by copper oxide | Zendy

Hamza Amaouche | Zendy; Salima Chergui | Zendy; Farid Halet | Zendy; Ahmed Réda Yeddou | Zendy; Abdelmalek Chergui | Zendy; Boubekeur Nadjemi | Zendy; Aïssa OuldDris | Zendy

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Removal of cyanide in aqueous solution by oxidation with hydrogen peroxide catalyzed by copper oxide

Author(s) -

Hamza Amaouche,

Salima Chergui,

Farid Halet,

Ahmed Réda Yeddou,

Abdelmalek Chergui,

Boubekeur Nadjemi,

Aïssa OuldDris

Publication year - 2019

Publication title -

water science and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.406

H-Index - 137

eISSN - 1996-9732

pISSN - 0273-1223

DOI - 10.2166/wst.2019.254

Subject(s) - cyanide , hydrogen peroxide , catalysis , chemistry , aqueous solution , copper , inorganic chemistry , oxide , hydrogen cyanide , peroxide , reaction rate constant , kinetics , nuclear chemistry , organic chemistry , physics , quantum mechanics

This work is dedicated to the removal of free cyanide from aqueous solution through oxidation with hydrogen peroxide H 2 O 2 catalyzed by copper oxide nanoparticles. Effects of initial molar ratio [H 2 O 2 ] 0 /[CN - ] 0 , catalyst dose, temperature, pH and the catalyst stability on cyanide removal have been investigated. The use of copper oxide has improved the reaction rate showing catalytic activity. The cyanide removal efficiency was increased from 60% to 94% by increasing in the dose of catalyst from 0.5 g/L to 5.0 g/L. Increasing the temperature from 20 °C to 35 °C promotes cyanide removal and the four successive times re-use of catalyst shows good stability. Kinetics of cyanide removal was found to be of pseudo-first-order with respect to cyanide. The rate constants have been determined.

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