The operating parameters in the electro-Fenton process were simulated using computational fluid dynamics (CFD). The effects of H2O2/Fe(2+) molar ratio, current density, pH and reaction time were numerically investigated. The results were compared with the experimental data. The simulated data showed that maximum chemical oxygen demand (COD) removal was around 91.52% at pH of 3.27, H2O2/Fe(2+) molar ratio of 1.16, current density of 59.29 mA/cm(2) and reaction time of 41.7 min while the experimental data obtained from the literature showed a maximum COD removal (94.7%) at pH of 3, H2O2/Fe(2+) molar ratio of 1, current density of 49 mA/cm(2) and reaction time of 43 min.
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http://dx.doi.org/10.2166/wst.2013.715 | DOI Listing |
Water Sci Technol
June 2015
Pontifícia Universidade Católica do Rio de Janeiro and Peróxidos do Brasil Ltda. (Solvay Group), 22451-041, Rio de Janeiro - RJ, Brazil.
This study evaluated the use of a Fenton's reaction in a falling film solar reactor (FFR), as a possible advanced oxidation process for the mineralization of the organic compound phenol in water. Preliminary tests were carried out to evaluate phenol degradation by photolysis and to select the optimal residence time in which to carry out the process using a solar photo-Fenton system. The variables studied were the initial phenol concentration (100 to 300 mg L(-1)), the [Phenol]:[H2O2] mass ratio (1.
View Article and Find Full Text PDFJ Environ Health Sci Eng
June 2013
Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
Biodegradation of azo dyes is difficult due to their complex structures and low BOD to COD ratios. In the present study, the efficiency of using Fenton's reagent (H2O2 + Fe2+) as a pretreatment process to enhance microbial transformation of reactive black 5 (RB5) in an aqueous system was evaluated. The RB5 with an initial concentration of 250 mg/L was decolorized up to 90% in 60 h by using a bacterial consortium.
View Article and Find Full Text PDFJ Environ Sci Health A Tox Hazard Subst Environ Eng
July 2010
School of Civil Engineering, Universiti Sains Malaysia, Nibong Tebal, Penang, Malaysia.
This study evaluated the effectiveness of Fenton's technique for the treatment of semi-aerobic landfill leachate collected from Pulau Burung Landfill Site (PBLS), Penang, Malaysia. The Fe2+ or Fe3+ as catalyst and H2O2 as oxidizing agent are commonly used for the classical Fenton's reaction. In present study, the effect of operating conditions such as pH, reaction time, molar ratio, agitation rate, feeding mode and Fenton reagent concentrations which are important parameters that affect the removal efficiencies of Fenton method were investigated.
View Article and Find Full Text PDFEnviron Sci Pollut Res Int
May 2010
Laboratory of Applied Environmental Chemistry, University of Eastern Finland, Patteristonkatu 1, 50100, Mikkeli, Finland.
Background, Aim, And Scope: Chlorinated volatile organic compounds (CVOCs), widely used in industry as solvents and chemical intermediates in the production of synthetic resins, plastics, and pharmaceuticals, are highly toxic to the environment and public health. Various studies reported that Fenton's oxidation could degrade a variety of chlorinated VOCs in aqueous solutions. In acidic conditions, ferrous ion catalyzes the decomposition of H2O2 to form a powerful *OH radical.
View Article and Find Full Text PDFWater Environ Res
December 2009
Electrochemistry and Environment Laboratory, National Engineering School of Sfax, Tunisia.
This paper evaluates the dark Fenton and the solar photo-Fenton advanced oxidation processes for the treatment of solutions containing 4-chloroguaiacol (4-CG). The 4-CG was chosen as a model compound found in pulp and paper wastewater formed in the bleaching process in the pulp industry. The effects of operating parameters, including reaction time, hydrogen peroxide-to-ferrous iron molar ratio (H2O2/Fe2+), initial chemical oxygen demand (COD), pH value, and temperature, on 4-CG degradation efficiency using the solar photo-Fenton process were investigated.
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