Experimental design to optimize the degradation of the synthetic dye Orange II using Fenton's reagent

The experimental design methodology was applied having in mind the optimization of the azo dye Orange II degradation using the Fenton's reagent (mixture of H 2O 2 and Fe 2+). The variables considered were the temperature, H 2O 2 concentration and Fe 2+:H 2O 2 ratio, for a dye concentration of 0...

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Bibliographic Details
Published in:Catalysis today 2005-10, Vol.107, p.68-76
Main Authors: Ramirez, J. Herney, Costa, Carlos A., Madeira, Luis M.
Format: Article
Language:English
Subjects:
Catalysis
Chemistry
Exact sciences and technology
Experimental design
Fenton's reagent
General and physical chemistry
Hydrogen peroxide
Orange II
Oxidation
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:The experimental design methodology was applied having in mind the optimization of the azo dye Orange II degradation using the Fenton's reagent (mixture of H 2O 2 and Fe 2+). The variables considered were the temperature, H 2O 2 concentration and Fe 2+:H 2O 2 ratio, for a dye concentration of 0.3 mM and pH 3. The multivariate experimental design allowed to develop quadratic models for: (i) color removal and (ii) total organic carbon (TOC) reduction (both after 2 h of reaction), which were adequate to predict responses in all the range of experimental conditions used. Under the optimum conditions, performances of 99.7 and 70.7% for color and TOC removal, respectively, were experimentally reached. It was found that both H 2O 2 concentration and temperature have an important effect in the organic matter degradation efficiency.
ISSN:0920-5861
1873-4308
DOI:10.1016/j.cattod.2005.07.060