[01] Asma Sennaoui, Laboratory of Physical Chemistry, Team Photocatalysis and Environment, Faculty of Science, Ibn Zohr University, Agadir, Morocco. [02] Fatima Sakr, Laboratory of Physical Chemistry, Team Photocatalysis and Environment, Faculty of Science, Ibn Zohr University, Agadir, Morocco. [03] Said Alahiane, Laboratory of Physical Chemistry, Team Photocatalysis and Environment, Faculty of Science, Ibn Zohr University, Agadir, Morocco. [04] Ali Assabbane, Laboratory of Physical Chemistry, Team Photocatalysis and Environment, Faculty of Science, Ibn Zohr University, Agadir, Morocco. [05] El Habib Ait Addi, Team Biotechnology, Energy and environment, Superior School of Technology, Ibn Zohr University, Agadir, Morocco.

Solutions of Reactive Yellow 17 (RY17) azo dye were degraded by electro-Fenton process (EF) using an undivided electrochemical cell containing a boron doped diamond (BDD) electrode. A 24 factorial design considering the initial Fe2+ and dye concentrations, the applied current and the electrolysis time as variable independents was used to analyze the process by response surface methodology. The maximum decolorization efficiency attained 99.94%, in the response of variations in the experimental conditions, which confirms the electro-Fenton process ability and also importance of the process modeling. The ANOVA analysis confirmed that all of the variables have significant influence on the model response and showed a high coefficient of determination value (R2 = 0.9938). Graphical response surface and contour plots were used to locate the optimum point. The optimum values of the process variables for the maximum decolorization efficiency (100 %) were Fe2+ concentration = 0.04 mM, applied current = 100 mA, RY17 concentration = 5 mg/L and electrolysis time =30 min.

Degradation, Reactive Yellow 17, Advanced Oxidation Processes, Hydroxyl Radical, Electro-Fenton, Response Surface Methodology (RSM)

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