Oxidative Destruction of Picric Acid in Aqueous Media by Fenton's Reagent

2009 ◽  
Vol 26 (2) ◽  
pp. 343-350 ◽  
Author(s):  
Abua Ikem ◽  
Nosa O. Egiebor
Keyword(s):  
Picric Acid ◽  
Aqueous Media ◽  
Fenton’S Reagent ◽  
Oxidative Destruction ◽  
Fenton's Reagent

Reactions of Hydroxyl Radicals with Chlorobenzenes: Comparison of TiO2 Photocatalyst Reactions to Fenton’s Reagent

1989 ◽  
Vol 24 (4) ◽  
pp. 537-552 ◽  
Author(s):  
G. Lepore ◽  
C.H. Langford
Keyword(s):  
Hydroxyl Radical ◽  
Hydroxyl Radicals ◽  
Aqueous Media ◽  
Surface Generation ◽  
Fenton’S Reagent ◽  
Adsorbed State ◽  
Fenton's Reagent ◽  
Photo Catalysis ◽  
Solution Generation ◽  
The Individual

Abstract A comparative study on reactions of solution and surface generated hydroxyl radicals with chlorobenzenes has been carried out, to determine the reaction path of reactive intermediates in photo-catalysis. Two separate approaches for generating hydroxyl radical oxidants in aqueous media were employed. Fenton’s reagent (solution generation) and TiO2 irradiation (surface generation) were exploited in the decomposition of dichlorobenzenes, 1,2,4-trichlorobenzene and a mixture (o-DCB, m-DCB, 1,2,4-TCB). Photocatalysis displayed a distinctive order for the individual chlorobenzenes with increasing ease of disappearance: p-DCB < 1,2,4-TCB < o-DCB < m-DCB. Reduced selectivity was observed for a mixture. Use of Fenton’s reagent resulted in the following pattern for both individual and the mixture of chlorobenzenes: 1,2,4-TCB < o-DCB ≈ p-DCB ≈ m-DCB. Added acetone, suppressed the disappearance of the parent chlorinated aromatics in both systems. However, in the reaction with Fenton’s reagent 1,2,4-TCB displayed considerable sensitivity in comparison to the DCB isomers. In contrast, the photocatalysis of three individual substrates evaluated in a mixture (1,2,4-TCB, m-DCB, o-DCB) did not manifest significant differences. Results indicate that reactions observed on the photocatalyst must occur in the adsorbed state, where the oxidant is an adsorbed hydroxyl radical or the surface trapped hole itself.

Degradation of trace contaminants using coupled sonochemistry and Fenton's reagent

2003 ◽  
Vol 47 (10) ◽  
pp. 85-92 ◽  
Author(s):  
Y. Jiang ◽  
T.D. Waite
Keyword(s):  
Reaction Temperature ◽  
Aqueous Media ◽  
Operating Conditions ◽  
Oh Radicals ◽  
Fenton’S Reagent ◽  
Pseudo First Order Reaction ◽  
Optimal Operating ◽  
Fenton's Reagent ◽  
First Order ◽  
Phenol Decomposition

The degradations of phenol in air-equilibrated aqueous media were investigated using coupled sonochemistry and Fenton's reagent for a variety of operating conditions. The decomposition yields of phenol (100-500 mM) were substantially enhanced due to the addition of Fenton's reagent (FeSO4) into the solutions irradiated at 608 kHz with 30 W and with reaction temperature 25 ± 1°C. The decomposition process follows a pseudo-first-order reaction kinetics with respect to phenol concentration, and the rate constant of phenol disappearance observed increases by approximately 2-3 fold when FeSO4 concentration was between 400 and 1000 M at pH = 3.5 ± 0.2 (controlled by phosphate buffer) as a result of Fe(II) reaction with H2O2 enabling further production of additional OH• radicals. The results obtained here also indicate that the decomposition rate of aqueous phenol using coupled ultrasound and Fenton's reagent was strongly dependant on the initial concentration of reactant, the amount of Fe(II) added as well as the pH of solution. The optimal operating conditions for 100-500 mM phenol decomposition in the air-equilibrated aqueous media were obtained when FeSO4 concentration was between 400 and 1,000 mM with pH in the range 3.5-4.2 under ultrasonic irradiation at 608 kHz, 30 W and reaction temperature 25 ± 1°C.

Use of Fenton's Reagent for the Degradation of TCE in Aqueous Systems and Soil Slurries

2000 ◽  
Vol 9 (4) ◽  
pp. 331-345 ◽  
Author(s):  
Katherine R. Weeks ◽  
Clifford J. Bruell ◽  
Nihar R. Mohanty
Keyword(s):  
Fenton’S Reagent ◽  
Aqueous Systems ◽  
Fenton's Reagent

Detection of Picric Acid by Terpy-Based Metallo-Supramolecular Fluorescent Coordination Polymers in Aqueous Media

2017 ◽  
Vol 35 (4) ◽  
pp. 447-456 ◽  
Author(s):  
Zhongyu Ding ◽  
Hongqing Li ◽  
Wanqing Gao ◽  
Yiquan Zhang ◽  
Chunhua Liu ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
Picric Acid ◽  
Aqueous Media

The action of fenton's reagent on carbohydrates

Tetrahedron ◽  
1963 ◽  
Vol 19 (11) ◽  
pp. 1705-1710 ◽  
Author(s):  
G.J. Moody
Keyword(s):  
Fenton’S Reagent ◽  
Fenton's Reagent

Additions and Corrections - Oxidation of Mandelic Acid by Fenton's Reagent

1982 ◽  
Vol 104 (13) ◽  
pp. 3783-3783
Author(s):  
Cheves Walling ◽  
Kalyani Amarnath ◽  
Curt Campbell
Keyword(s):  
Mandelic Acid ◽  
Fenton’S Reagent ◽  
Fenton's Reagent

Fluorescent Nanoaggregates of Pentacenequinone Derivative for Selective Sensing of Picric acid in Aqueous Media

2012 ◽  
Vol 14 (12) ◽  
pp. 3112-3115 ◽  
Author(s):  
Vandana Bhalla ◽  
Ankush Gupta ◽  
Manoj Kumar
Keyword(s):  
Picric Acid ◽  
Aqueous Media
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