Abstract
This work investigates oxidative decolorization of two different dyes, Methylene blue and Titan yellow in aqueous solution using an environmentally friendly advanced electro-chemical oxidation (electro-Fenton) process. The effect of operating conditions like H2O2 concentration, current density, initial dye concentration was studied in a batch stirred cell. Individual decolorization decay kinetics for both dyes was investigated. The second-order absolute rate constants (L mol−1 s−1) between hydroxyl radical and dye have been calculated from experimental data by fitting it to the decolorization model. The apparent kinetic constants, k app (s−1) for Methylene blue and Titan yellow dye decolorization were also determined. The experimental data showed a good fit to the theoretical model, which can predict data in a wide range of % dye decolorization. This process also reduces COD of the dye solution, and the unit energy demand (UED) in kWh/kg COD removed for different electrical current has been reported.
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Ghosh, P., Thakur, L.K., Samanta, A.N. et al. Electro-Fenton treatment of synthetic organic dyes: Influence of operational parameters and kinetic study. Korean J. Chem. Eng. 29, 1203–1210 (2012). https://doi.org/10.1007/s11814-012-0011-6
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DOI: https://doi.org/10.1007/s11814-012-0011-6