Studies of oxidations by Fenton's reagent using redox titration. III. Reactions with carbohydrates and polyhydroxy compounds

1972 ◽  
Vol 25 (1) ◽  
pp. 105 ◽  
Author(s):  
DL Ingles
Keyword(s):  
Oxidation Potential ◽  
Cyclic Process ◽  
Ferric Ion ◽  
Fenton’S Reagent ◽  
Complete Oxidation ◽  
Redox Titration ◽  
Fenton's Reagent ◽  
Polyhydroxy Compounds

The oxidation of carbohydrates and some other polyhydroxy compounds by Penton's reagent has been studied by redox titration at constant oxidation potential. Such compounds were oxidized by a cyclic process involving the formation of enediols which reduced ferric ion. The possible significance of these reactions is indicated. The peroxide consumed in the complete oxidation of carbohydrates and some polymers was measured in the absence and presence of oxygen.

Studies of oxidation by fenton's reagent using redox titration. I. Oxidation of some organic compounds

1972 ◽  
Vol 25 (1) ◽  
pp. 87 ◽  
Author(s):  
DL Ingles
Keyword(s):  
Organic Compounds ◽  
Organic Substrate ◽  
Oxidation Potential ◽  
Oxidation Products ◽  
Fenton’S Reagent ◽  
Complete Oxidation ◽  
Redox Titration ◽  
Fenton's Reagent

Oxidations using Fenton's reagent have not been followed previously by redox titration. This procedure assists in defining the overall reaction and allows both an estimate of relative rates of oxidation and a measure of the consumption of peroxide by the organic substrate. The peroxide consumed in the complete oxidation of substrate to inactive compounds has been measured by titration at constant oxidation potential. Such measurements reflect the peroxide consumed by the substrate and its consecutive oxidation products and may therefore be used to assess the significance of oxidation pathways.

Studies of oxidations by Fenton's reagent using redox titration. II. Effect of oxygen

1972 ◽  
Vol 25 (1) ◽  
pp. 97 ◽  
Author(s):  
DL Ingles
Keyword(s):  
Gas Chromatography ◽  
Oxidation Potential ◽  
Fenton’S Reagent ◽  
Complete Oxidation ◽  
Redox Titration ◽  
Fenton's Reagent ◽  
Chain Reactions ◽  
Effect Of Oxygen

The effect of oxygen on oxidations by Fenton's reagent has been studied by redox titration at constant oxidation potential. The reactivity of substrate radicals towards oxygen has been assessed. The peroxide requirements for the complete oxidation of substrate in the absence and presence of oxygen have been compared. The extent of oxidation of different substrates was determined by gas chromatography and the results indicated the occurrence, in oxygen, of nem chain reactions.

Studies of oxidations by fenton's reagent using redox titration. V. Effect of complex formation on reaction mechanism

1973 ◽  
Vol 26 (5) ◽  
pp. 1021 ◽  
Author(s):  
DL Ingles
Keyword(s):  
Reaction Mechanism ◽  
Complex Formation ◽  
Hydroxyl Radical ◽  
Butyl Alcohol ◽  
Fenton’S Reagent ◽  
Redox Titration ◽  
Fenton's Reagent ◽  
Free Hydroxyl ◽  
Electron Transfers ◽  
H2o2 System

The effect of complex formation on the oxidation of substrate in the Fe2+-H2O2 system has been studied. t-Butyl alcohol which is normally oxidized to the dimer, 2,5-dimethylhexane-2,5-diol, by Fenton's reagent has been used as a probe for the presence of free hydroxyl radical. ��� It is shown that when suitable complexes are formed substrates are not oxidized by free hydroxyl radical. Instead, new mechanisms involving one- and two-electron transfers within a substrate-ferrous ion-peroxide complex are proposed.

Studies of oxidations by fenton's reagent using redox titrations. IV. Oxidation of ethanol and t-butyl alcohol

1973 ◽  
Vol 26 (5) ◽  
pp. 1015 ◽  
Author(s):  
DL Ingles
Keyword(s):  
Reaction Rates ◽  
Butyl Alcohol ◽  
Oxidation Products ◽  
Fenton’S Reagent ◽  
Copper Salts ◽  
Redox Titration ◽  
Fenton's Reagent ◽  
Titration Procedure ◽  
Free Hydroxyl ◽  
Oxidation Of Ethanol

The oxidation of ethanol by Fenton's reagent was studied to confirm the validity of the redox titration procedure. A quantitative analysis of oxidation products during the complete oxidation of ethanol and its consecutive oxidation products is presented. � The oxidation of t-butyl alcohol was studied under a number of different conditions and yields of acetone and the dimer, 2,5- dimethylhexane-2,5-diol, were obtained. The effects of oxygen, copper salts, and chloride and bromide ions on this oxidation were studied. ��� The ratio of reaction rates of ethanol and t-butyl alcohol with the free hydroxyl radical was determined.

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

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

Kinetics and mechanism of oxidative decomposition of Congo red by Fenton’s reagent and its synergic effects on exposure to UV radiation

2021 ◽  
Vol 25 (7) ◽  
pp. 8-12
Author(s):  
P. Rajendran ◽  
K. Geethu ◽  
P. Bashpa ◽  
K. Bijudas
Keyword(s):  
Congo Red ◽  
Homogeneous Medium ◽  
Ultra Violet ◽  
Kinetics And Mechanism ◽  
Fenton’S Reagent ◽  
Fenton Reagent ◽  
Fenton's Reagent ◽  
Oxidative Decomposition ◽  
Ultra Violet Radiation ◽  
Thermodynamic Variables

Congo red is a toxic azo dye which is used extensively in industries like textile, paper, pulp and paper. Very high amount of Congo red from these industrial sources is discharged into natural water bodies resulting environmental pollution. The present work reports the kinetics and mechanism of oxidative decomposition of Congo red by Fenton’s reagent in homogeneous medium and also under ultra violet light irradiation. Kinetic parameters like effect of [Fe2+], [H2O2], [Congo red] and temperature on the decomposition of Congo red were studied. The reaction is found to be fractional order with [Fe2+] and first order with [H2O2] and [Congo red]. The rate of oxidative decomposition of Congo red by Fenton’ reagent showed a rapid increase of three times when irradiated with ultra violet radiation and completion of reaction occurred within 5-6 minute. Various thermodynamic variables were determined and the presence of isosbestic points on sequential scanning of oxidation kinetics proves that the reaction is very smooth, spontaneous and endothermic. A suitable mechanism is suggested based on the experimental results obtained.

Sign in / Sign up

Export Citation Format

Share Document