Kinetics of sulphur(IV) oxidation by hydrogen peroxide in basic aqueous solution

1996 ◽  
Vol 30 (7) ◽  
pp. 1013-1018 ◽  
Author(s):  
J. Lagrange ◽  
C. Pallares ◽  
G. Wenger ◽  
P. Lagrange
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Kinetics Of ◽  
Oxidation By Hydrogen Peroxide

Kinetics of the oxidation of hydrogen sulfite by hydrogen peroxide in aqueous solution:

1999 ◽  
Vol 33 (27) ◽  
pp. 4413-4419 ◽  
Author(s):  
Frank Maaß ◽  
Horst Elias ◽  
Klaus J. Wannowius
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Oxidation Of Hydrogen ◽  
Kinetics Of

Kinetics of the UV degradation of atrazine in aqueous solution in the presence of hydrogen peroxide

1995 ◽  
Vol 88 (1) ◽  
pp. 65-74 ◽  
Author(s):  
Javier Arántegui ◽  
Juan Prado ◽  
Esther Chamarro ◽  
Santiago Esplugas
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Uv Degradation ◽  
Kinetics Of

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.

scholarly journals Kinetics of pyrite oxidation by hydrogen peroxide in phosphoric acid solutions

1999 ◽  
Vol 64 (12) ◽  
pp. 753-764 ◽  
Author(s):  
Mile Dimitrijevic ◽  
Milan Antonijevic ◽  
Valentina Dimitrijevic
Keyword(s):  
Hydrogen Peroxide ◽  
Phosphoric Acid ◽  
Pyrite Oxidation ◽  
Negative Influence ◽  
Acid Solutions ◽  
Phosphate Ion ◽  
Shrinking Core ◽  
Kinetics Of ◽  
Rate Controlling Step ◽  
Oxidation By Hydrogen Peroxide

The kinetics of pyrite oxidation by hydrogen peroxide in phosphoric acid solutions were investigated. The effects of stirring, temperature, and particle size, as well as of the hydrogen peroxide and phosphoric acid concentrations were studied. The effect of phosphate ion addition was also examined. The oxidation kinetics was found to follow a shrinking core model, with the surface chemical reaciton as the rate-controlling step. This is in accord with an activation energy of 57 kJ/mol and a linear relationship between the rate constant and the reciprocal of the particle radius. The reaction order with respect to the hydrogen peroxide concentration was found to be equal to unity. Variation of the phosphoric acid concentration had practically no effect on the rate of pyrite oxidation. Addition of the phosphate ion in the relatively low concentration range (0.005.0.1 mol/dm 3) had a highly negative influence on the rate of pyrite oxidation, indicating that this ion has an inhibiting effect on the oxidation of pyrite by hydrogen peroxide.

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