The kinetics of iodide oxidation by hydrogen peroxide in acid solution

2011 ◽  
Vol 85 (13) ◽  
pp. 2279-2282 ◽  
Author(s):  
M. C. Milenković ◽  
D. R. Stanisavljev
Keyword(s):  
Hydrogen Peroxide ◽  
Acid Solution ◽  
Iodide Oxidation ◽  
Kinetics Of ◽  
Oxidation By Hydrogen Peroxide

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.

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

Leaching kinetics of scheelite in hydrochloric acid solution containing hydrogen peroxide as complexing agent

2014 ◽  
Vol 144-145 ◽  
pp. 140-147 ◽  
Author(s):  
Guixiang He ◽  
Zhongwei Zhao ◽  
Xiaobo Wang ◽  
Jiangtao Li ◽  
Xingyu Chen ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Hydrochloric Acid ◽  
Acid Solution ◽  
Hydrochloric Acid Solution ◽  
Complexing Agent ◽  
Leaching Kinetics ◽  
Kinetics Of
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