Dissolution of copper oxide by the ethanolamine and ammonium fluoride in aqueous solution

2011 ◽  
Vol 44 (1) ◽  
pp. 94-97 ◽  
Author(s):  
Cheon Kwang Ko ◽  
Won Gyu Lee
Keyword(s):  
Aqueous Solution ◽  
Copper Oxide ◽  
Ammonium Fluoride

scholarly journals Corrigendum: Syngas Production from Electrochemical CO 2 Reduction on Copper Oxide Electrodes in Aqueous Solution

2021 ◽  
Vol 8 (5) ◽  
pp. 948-948
Author(s):  
Xi Yao ◽  
Yafei Guo ◽  
Bingqian Liu ◽  
Puyao Wang ◽  
Jian Sun ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Copper Oxide ◽  
Syngas Production ◽  
Oxide Electrodes

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

2019 ◽  
Vol 80 (1) ◽  
pp. 126-133
Author(s):  
Hamza Amaouche ◽  
Salima Chergui ◽  
Farid Halet ◽  
Ahmed Réda Yeddou ◽  
Abdelmalek Chergui ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Copper Oxide ◽  
Copper Oxide Nanoparticles ◽  
Catalyst Stability ◽  
Molar Ratio ◽  
First Order ◽  
Cyanide Removal ◽  
Stability Kinetics ◽  
Kinetics Of

Abstract This work is dedicated to the removal of free cyanide from aqueous solution through oxidation with hydrogen peroxide H2O2 catalyzed by copper oxide nanoparticles. Effects of initial molar ratio [H2O2]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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