Kinetics and Mechanism of the Degradation and Mineralization of Acetone in Dilute Aqueous Solution Sensitized by the UV Photolysis of Hydrogen Peroxide

1996 ◽  
Vol 30 (7) ◽  
pp. 2382-2390 ◽  
Author(s):  
Mihaela I. Stefan ◽  
Aitken R. Hoy ◽  
James R. Bolton
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Kinetics And Mechanism ◽  
Uv Photolysis ◽  
Dilute Aqueous Solution

Quantum Yields for the Photodegradation of Pollutants in Dilute Aqueous Solution: Phenol, 4-Chlorophenol and N-Nitrosodimethylamine

1996 ◽  
Vol 1 (2) ◽  
Author(s):  
Te-Fu L. Ho ◽  
James R. Bolton ◽  
Ewa Lipczynska-Kochany
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Quantum Yield ◽  
High Performance ◽  
Flash Photolysis ◽  
Quantum Yields ◽  
Visible Absorption ◽  
Dilute Aqueous Solution ◽  
Uv Visible ◽  
Photolysis Of Phenol

AbstractA broadband method has been applied to determine the quantum yields for the photochemical removal of three common pollutants: phenol, 4-chlorophenol and N-nitrosodimethylamine (NDMA) in dilute aqueous solution. Flash photolysis (xenon flash lamps) was used to cause a significant amount of photolysis without photolyzing intermediates. The analysis of reactant depletion following a single flash was carried out by high- performance liquid chromatography (HPLC) or UV/visible absorption spectroscopy. The method for determining quantum-yields employed p-benzoquinone as an actinometer and was validated by determining the average (200-400 nm) quantum yield for the generation of hydroxyl radicals from the photolysis of hydrogen peroxide (0.90 ± 0.10) and the quantum yields for the photolysis of phenol (0.13 ± 0.02) and 4-chlorophenol (0.24 ± 0.04). The values determined agree very well with the literature ones obtained with monochromatic radiation. The quantum yield for the direct photolysis of NDMA was found to be 0.11 ± 0.03 at neutral pH and 0.27 ± 0.02 at pH 2-4. Under conditions where hydrogen peroxide is the principal absorber, the NDMA quantum yield is 0.32 ± 0.04, independent of pH in the range 2-8.

Notes - Reaction of Paraoxon with Hydrogen Peroxide in Dilute Aqueous Solution

1956 ◽  
Vol 21 (7) ◽  
pp. 796-797 ◽  
Author(s):  
Joseph. Epstein ◽  
Mary M. Demek ◽  
David H. Rosenblatt
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Dilute Aqueous Solution

Kinetics and Mechanism of the Homogeneous Oxidation of Quinaldine Red by Hydrogen Peroxide

2001 ◽  
Vol 215 (5) ◽  
Author(s):  
Ibrahim A. Salem ◽  
M. El-Maazawi
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Kinetics And Mechanism ◽  
Cationic Dye ◽  
First Order ◽  
Homogeneous Oxidation ◽  
Rate Of Reaction ◽  
Kinetics Of ◽  
Quinaldine Red

The kinetics of the oxidation of quinaldine red, a cationic dye, using hydrogen peroxide has been studied in aqueous solution. The rate of reaction was found to be first order in [quinaldine red] whereas in hydrogen peroxide it varies from one to zero with increasing [H

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