Kinetic study and hydrogen peroxide consumption of phenolic compounds oxidation by Fenton’s reagent

Luis, Ana de; Lombraña, José Ignacio; Varona, Fernando; Menéndez, A.

doi:10.1007/s11814-009-0009-x

Cited by 26 publications

(22 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As the concentration increased to 10 mm, the efficiency reduced dramatically. As stated in other studies, the decrease of efficiency can be attributed to the excessive concentration of hydrogen peroxide and spontaneous decomposition of this oxidizing agent (18,19). With the increase of iron sulfate from 10 to 15 mM, favorite decolonization was observed, because any increase in the level of iron concentration resulted in the production of more hydroxyl radical, and consequently the speed and rate of bleaching increased.…”

Section: Discussionmentioning

confidence: 51%

Comparing Fenton Oxidation with Conventional Coagulation Process for RR198 Dye Removal from Aqueous Solutions

Esrafili

Yengejeh

2017

Iran J Health Sci

View full text Add to dashboard Cite

Background and purpose: The wastewater discharged from textile industries is one of the main environmental pollutants that causes many problems for the environment if it is not treated or discharged. The present study compared Fenton oxidation process with coagulation and flocculation using the natural coagulant of Sodium Alginate in order to remove Reactive Red 198 Dye. Materials and methods: This study was carried out in an experimental scale, in which the effects of pH, concentration of the dyeing substance, concentration of iron sulfate and hydrogen peroxide for the oxidation of Fenton and the effects of pH, concentration of coagulant, concentration of dyeing substance, and the Coagulant Aid of Sodium Alginate were all investigated. Results:The results of the current study indicated that in the Fenton process, the efficiency of RR 198 Dye removal under acidic conditions (pH=3) at optimal conditions was achieved to be 96.2% for the dye with the concentration of 20 mg/l. By using 70 mg/l of the coagulant of Poly-Aluminum Chloride in coagulation and flocculation process, 71.2% of the dye removal was obtained for the initial concentration of the dye as 20 mg/l. Also, by adding 50 mg/l of Sodium Alginate to the optimal concentration of Poly-Aluminum Chloride, the dye removal increased up to 92.1%. Conclusion: Although under optimal conditions, the efficiency of coagulation process with coagulant aid was only 4% less than the efficiency of Fenton process, considering the advantages of Fenton oxidation including lack of production of excessive sludge, a higher efficiency was gained at large doses of dye.

show abstract

Section: Discussionmentioning

confidence: 51%

Comparing Fenton Oxidation with Conventional Coagulation Process for RR198 Dye Removal from Aqueous Solutions

Esrafili

Yengejeh

2017

Iran J Health Sci

View full text Add to dashboard Cite

show abstract

“…These constants adequately describe the elimination kinetics of both reagents and result from the sum of the kinetic terms of the different radicals, as can be seen in Eqs. (17) and (18).…”

Section: Radical Concentration Model To Describe Degradation Of Phenomentioning

confidence: 99%

Modeling of the radicalary state in the H₂O₂/UV oxidation system to predict the degradation kinetics of phenolic mixture solutions

Luis

Lombraña

Menéndez

2011

Env Prog and Sustain Energy

Self Cite

View full text Add to dashboard Cite

The characterization of radical oxidation in the degradation of phenolic compounds with H 2 O 2 /UV has been studied. A kinetic model was developed to estimate the concentration of different radical species. Radical concentration defines a determined oxidative level whose changes are analyzed for different oxidizing conditions involving pH and hydrogen peroxide dosage. This study has been developed to extend a previous radical model, only for simple phenolic solutions, to phenolic mixtures consisting of phenol and different cresols. In a mixture, the effects of composition and total amount of phenolics have a great influence on the degradation of each compound markedly modifying the behavior found in a simple solution. The application of a new extended radicalary model requires the characterization of the phenolic mixture solution through two fundamental parameters. The first one is the equivalent phenol in the mixture or phenol concentration, which gives the same oxidative level as that of the mixture case. Besides, additional information must be considered to characterize the deviation of the radical level between each compound and the mixture through the corresponding coefficient of radicalary activity. The model has been applied and verified to estimate the degradation of the different phenolics of a mixture, whatever the composition of phenolics, with good fitting to the experimental data.

show abstract

“…When pH >3, oxidation efficiency rapidly decreases due to auto-decomposition of H2O2 affecting the production of OH • radicals (Badawy and Ali, 2006) and deactivation of ferrous catalyst with the formation of ferric hydroxide precipitates (Luis et al, 2009 …”

Section: Effect Of Phmentioning

confidence: 99%

Degradation of Para-Phenylenediamine in Aqueous Solution by Photo-Fenton Oxidation Processes

Shridhara¹,

Chethan²,

Basavaraju³

et al. 2014

Sci. Technol. Arts Res. J.

View full text Add to dashboard Cite

Article InformationIn this research Photo-Fenton Oxidation of Para-Phenylenediamine (PPD) in aqueous solution by UV/Fenton's reagent (Fe 2+ and H2O2) was investigated. Experiments were conducted in a batch reactor, at pH 3.5 and at 25°C with a source of UV-C light. The effects of different reaction parameters such as initial PPD concentration, pH of the solution, ferrous concentration, Hydrogen peroxide concentration, on the oxidative degradation of PPD were measured. Final concentration of PPD and COD of the solution after treatment were determined to know degree of degradation of the compound. Iron source used for photo-Fenton's oxidation were Ferrous Sulphate (FeSO4.7H2O).The optimum conditions established by Fenton's oxidation without UV, were considered for this investigation. Only the maximum removal conditions were tried with the UV for reaction time of 3 hours. The results showed that under optimum experimental conditions, the pH 3.5, 50 mg/L H2O2, 3 mg/L Fe 2+ and UV reaction time of 3 hours, the initial concentration 10 mg/L of PPD was reduced by 71.20% with 65.89% COD removal. Likewise the removal efficiencies for PPD concentration of 20, 30, 40 and 50 mg/L keeping the same proportion of H2O2 and Fe 2+ dosage (with ratios of PPD:Fe 2+ :H2O2::10:1:16.7) were investigated and the results showed, PPD removal were 65.10, 61.23, 58.34 and 54.26% and COD removal was 61, 54, 52 and 50.32% respectively. From the results obtained it can be concluded that Fenton's reagent favours the lower concentration of Phenylenediamines and UV-C assisted photo-Fenton showed that the photo-Fenton process was very effective than the normal Fenton process.

show abstract

Kinetic study and hydrogen peroxide consumption of phenolic compounds oxidation by Fenton’s reagent

Cited by 26 publications

References 31 publications

Comparing Fenton Oxidation with Conventional Coagulation Process for RR198 Dye Removal from Aqueous Solutions

Comparing Fenton Oxidation with Conventional Coagulation Process for RR198 Dye Removal from Aqueous Solutions

Modeling of the radicalary state in the H₂O₂/UV oxidation system to predict the degradation kinetics of phenolic mixture solutions

Degradation of Para-Phenylenediamine in Aqueous Solution by Photo-Fenton Oxidation Processes

Contact Info

Product

Resources

About

Kinetic study and hydrogen peroxide consumption of phenolic compounds oxidation by Fenton’s reagent

Cited by 26 publications

References 31 publications

Comparing Fenton Oxidation with Conventional Coagulation Process for RR198 Dye Removal from Aqueous Solutions

Comparing Fenton Oxidation with Conventional Coagulation Process for RR198 Dye Removal from Aqueous Solutions

Modeling of the radicalary state in the H2O2/UV oxidation system to predict the degradation kinetics of phenolic mixture solutions

Degradation of Para-Phenylenediamine in Aqueous Solution by Photo-Fenton Oxidation Processes

Contact Info

Product

Resources

About

Modeling of the radicalary state in the H₂O₂/UV oxidation system to predict the degradation kinetics of phenolic mixture solutions