scholarly journals Treatment of Water Contaminated with DI-N-Butyl Phthalate by Foto-Fenton Process

2013 ◽  
Vol 5 (1) ◽  
pp. 23-28
Keyword(s):  
Hydrogen Peroxide ◽  
Hydroxyl Radical ◽  
Uv Irradiation ◽  
Fenton’S Reagent ◽  
H2o2 Concentration ◽  
Fenton Process ◽  
Ferrous Ions ◽  
Fenton's Reagent ◽  
Dominant Mechanism ◽  
Butyl Phthalate

This study was conducted to assess the removal efficiency of Di-n-butyl phthalate (DnBP) from aqueous medium using the photo-Fenton process. The Fenton's reagent that consists of a mixture of hydrogen peroxide (H2O) and ferrous ions (Fe2+) was used to generate the hydroxyl radical (OH0) that attacks the target contaminant and degrade it. An ultraviolet (UV) source was used to provide the radiation needed in the photo-Fenton method (i.e. UV/H2O2/Fe2+). The results demonstrated that photo-Fenton process was more effective and faster than Fenton's reagent in removing DnBP and that photolysis by UV irradiation was the dominant mechanism in degrading the compound. The results also showed that enhancing the removal via UV irradiation was achieved by increasing either the temperature or the H2O2 concentration.

Degradation of hexachloroethane by Fenton's reagents

2008 ◽  
Vol 58 (11) ◽  
pp. 2211-2214
Author(s):  
E. H. Jho ◽  
N. Singhal ◽  
S. Turner
Keyword(s):  
Hydrogen Peroxide ◽  
Fenton’S Reagent ◽  
H2o2 Concentration ◽  
Fenton's Reagent ◽  
Contaminant Mixtures

The effect of hydrogen peroxide (H2O2) concentrations on the degradation of hexachloroethane (HCA) in the absence and the presence of tetrachloroethene (PCE) by Fenton's reagent was investigated at pH 3 with 1 mM iron(II) and H2O2 concentrations ranging from 0.01 M to 2 M. HCA degradation in the absence of PCE increased with increasing H2O2 concentration between 0.2 M and 2 M. In the presence of PCE, HCA degradation was similar to that in the absence of PCE for H2O2 concentration up to 1 M, but significantly higher for 2 M H2O2. We propose that this increase is a result of elevated reductant radicals when PCE is present. This study highlights the need for further investigation into the degradation of contaminant mixtures at higher H2O2 concentrations.

Coagulation of textile secondary effluents with Fenton's reagent

1997 ◽  
Vol 36 (12) ◽  
pp. 215-222 ◽  
Author(s):  
Shyh-Fang Kang ◽  
Huey-Min Chang
Keyword(s):  
Hydrogen Peroxide ◽  
Cod Removal ◽  
Color Removal ◽  
Fenton’S Reagent ◽  
Fenton's Reagent ◽  
Effluent Standards ◽  
Secondary Effluents ◽  
Removal Efficiencies

This study was designed to use both artificial and real textile secondary effluents to evaluate (1) the COD and color removal efficiencies for ferrous coagulation and Fenton's coagulation, and (2) the feasibility of using hydrogen peroxide to improve ferrous coagulation to meet more stringent effluent standards. The results indicate that the optimum pHs for both ferrous coagulation and Fenton's preoxidation processes range between 8.0–10 and 3.0–5.0, respectively. The rate for color removal is faster than that for COD removal in the Fenton's preoxidation process. The removals of COD and color are mainly accomplished during Fenton's preoxidation step. The ratio of COD removal for Fenton's coagulation versus ferrous coagulation, given the same ferrous dosage, ranges from 1.4 to 2.3, and it ranges from 1.1 to 1.9 for color removal, using two effluent samples. Therefore, using hydrogen peroxide can enhance the ferrous coagulation, and this ensures more stringent effluent standards of COD and color are met.

Effect of Contaminant Hydrophobicity in the Treatment of Contaminated Soils by Catalyzed H2O2 Propagations (Modified Fenton’s Reagent)

2008 ◽  
Vol 11 (2) ◽  
Author(s):  
Richard J. Watts ◽  
Tanya M. Haeri-McCarroll ◽  
Amy L. Teel
Keyword(s):  
Hydrogen Peroxide ◽  
Contaminated Soils ◽  
Fenton’S Reagent ◽  
Fenton's Reagent

AbstractThe effect of contaminant hydrophobicity on hydrogen peroxide dosage requirements in the treatment of contaminated soils using catalyzed H

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.

Ascorbic acid and hydrogen peroxide (Fenton's reagent) induced changes in gelatin systems

2003 ◽  
Vol 17 (3) ◽  
pp. 321-326 ◽  
Author(s):  
Asgar Farahnaky ◽  
David A Gray ◽  
John R Mitchell ◽  
Sandra E Hill
Keyword(s):  
Hydrogen Peroxide ◽  
Ascorbic Acid ◽  
Fenton’S Reagent ◽  
Fenton's Reagent ◽  
Induced Changes

Study of the decomposition of four commercially available hydrogen peroxide solutions by Fenton's reagent

1997 ◽  
Vol 69 (5) ◽  
pp. 1052-1056 ◽  
Author(s):  
Brian K. Aldershof ◽  
Ronald M. Dennis ◽  
Craig J. Kunitsky
Keyword(s):  
Hydrogen Peroxide ◽  
Fenton’S Reagent ◽  
Fenton's Reagent

scholarly journals Comparison of Landfill Leachate Treatment Efficiency Using the Advanced Oxidation Processes

2013 ◽  
Vol 39 (2) ◽  
pp. 107-115 ◽  
Author(s):  
Barbara Pieczykolan ◽  
Izabela Płonka ◽  
Krzysztof Barbusiński ◽  
Magdalena Amalio-Kosel
Keyword(s):  
Hydrogen Peroxide ◽  
Organic Compounds ◽  
Advanced Oxidation Processes ◽  
Potassium Dichromate ◽  
Advanced Oxidation ◽  
Fenton’S Reagent ◽  
Nitrogen And Phosphorus ◽  
Leachate Treatment ◽  
Fenton's Reagent ◽  
Oxidation Processes

Abstract Treatment of leachate from an exploited since 2004 landfill by using two methods of advanced oxidation processes was performed. Fenton’s reagent with two different doses of hydrogen peroxide and iron and UV/H2O2 process was applied. The removal efficiency of biochemically oxidizable organic compounds (BOD5), chemically oxidizable compounds using potassium dichromate (CODCr) and nutrient (nitrogen and phosphorus) was examined. Studies have shown that the greatest degree of organic compounds removal expressed as a BOD5 index and CODCr index were obtained when Fenton’s reagent with greater dose of hydrogen peroxide was used - efficiency was respectively 72.0% and 69.8%. Moreover, in this case there was observed an increase in the value of ratio of BOD5/CODCr in treated leachate in comparison with raw leachate. Application of Fenton’s reagent for leachate treatment also allowed for more effective removal of nutrients in comparison with the UV/H2O2 process.

Kinetic Study of Advanced Oxidation of Eosin Dye by Fenton's Reagent

2008 ◽  
Vol 6 (1) ◽  
Author(s):  
Phalguni Banerjee ◽  
Sunando DasGupta ◽  
Sirshendu De
Keyword(s):  
Hydrogen Peroxide ◽  
Ferrous Sulfate ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Advanced Oxidation ◽  
Fenton’S Reagent ◽  
Fenton's Reagent ◽  
Oxidation Study ◽  
Dye Decomposition ◽  
Detailed Kinetic Model

An advanced oxidation study using Fenton's reagent, i.e., ferrous sulfate and hydrogen peroxide was carried out for studying oxidation of eosin dye. Effects of concentration of various reagents on the degradation of dye were explored during an advanced oxidation process. It was found that ferrous concentration plays a major role in dye decomposition. Rate of dye decomposition is faster with an increase in ferrous sulfate concentration compared to the increase in hydrogen peroxide concentration. A detailed kinetic model was proposed. Profiles for eosin, hydrogen peroxide and various intermediates were also generated. The rate constant of the reaction of eosin with a hydroxyl radical was found to be of the order of 109 l/mol.s.

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