The hydroxyl radical reaction rate constant and products of 3,5-dimethyl-1-hexyn-3-ol

2004 ◽  
Vol 36 (10) ◽  
pp. 534-544 ◽  
Author(s):  
J. R. Wells
Keyword(s):  
Hydroxyl Radical ◽  
Rate Constant ◽  
Reaction Rate ◽  
Radical Reaction ◽  
Reaction Rate Constant

The hydroxyl radical reaction rate constant and products of cyclohexanol

2001 ◽  
Vol 33 (2) ◽  
pp. 108-117 ◽  
Author(s):  
W. R. Bradley ◽  
S. E. Wyatt ◽  
J. R. Wells ◽  
M. V. Henley ◽  
G. M. Graziano
Keyword(s):  
Hydroxyl Radical ◽  
Rate Constant ◽  
Reaction Rate ◽  
Radical Reaction ◽  
Reaction Rate Constant

Removal of Refractory Organic Compounds Using Peroxy Radical and Ozone Reaction in Aqueous Solution

2008 ◽  
Vol 569 ◽  
pp. 33-36
Author(s):  
Jong Tae Jung ◽  
Jong Oh Kim ◽  
Bum Gun Kwon ◽  
Dong Ha Song
Keyword(s):  
Aqueous Solution ◽  
Reaction Time ◽  
Humic Acid ◽  
Hydroxyl Radical ◽  
Organic Compounds ◽  
Acid Concentration ◽  
Rate Constant ◽  
Reaction Rate ◽  
Peroxy Radical ◽  
Reaction Rate Constant

This study was conducted to evaluate the treatment performance of the system using peroxy radical/ozone reaction for refractory organic compounds removal in aqueous solution. The effect of initial humic acid concentration was conducted under the conditions of humic acid concentration 10 mg/L, 30 mg/L, 50 mg/L and 100 mg/L. Reaction rate constant (k) in 30 mg/L of humic acid concentration was higher than that of humic acid concentration 10 mg/L, 50 mg/L amd 100 mg/L. However, it decreased over the range of 30 mg/L of humic acid concentration due to the action of internal filter of humic acid itself. Reaction rate constant (k) in the initial 20 minute of reaction time was accelerated by decreasing hydraulic retention time (HRT). This may be ascribed to increase the reaction time between peroxy radical and ozone. pH is a key for both ozone stability and TiO2 surface property in aqueous solution. Reaction rate constant (k) of acid solution on pH variation was smaller compared to that of neutral or basic circumstances because ozone decomposes easily into hydroxyl radicals in neutral or basic solution. At reaction rate constant (k) for humic acid degradation in each unit process, peroxy radical/ozone combined system was higher than that of ozone only due to the effective production of hydroxyl radical. An obvious difference between ozone and peroxy radical/ozone is the consequence of hydroxyl radical produced by the reaction of ozone molecules and peroxy radicals.

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