Decolorization and Degradation of Methyl Orange Azo Dye in Aqueous Solution by the Electro Fenton Process: Application of Optimization

Catalysts

Roula Bayram¹  Amine Assouguem²  Ibtissam El Manssouri³  Mohammed Kara⁴  Faiçal El Ouadrhiri⁵  Noureddine Eloutassi⁵  Amal Lahkimi⁵  Abderrazzak Adachi⁵  Ilaria Peluso⁶  Mikhlid H. Almutairi⁷  Hanan R. H. Mohamed⁸ 

[1] Department of Analytical and Food Chemistry, Faculty of Pharmacy, Aleppo University, Aleppo 12212, Syria;Faculty of Sciences and Technology, Laboratory of Functional Ecology and Environment, Sidi Mohamed Ben Abdellah University, P.O. Box 2202, Imouzzer Street, Fez 30000, Morocco;Laboratory of Biotechnology of Environment, Agroalimentary, Health, Faculty of Sciences Fez, University Sidi Mohamed Ben Abdelah, Fes 30000, Morocco;Laboratory of Biotechnology, Conservation and Valorisation of Natural Resources (LBCVNR), Faculty of Sciences Dhar El Mehraz, Sidi Mohamed Ben Abdellah University, BP 1796 Atlas, Fez 30000, Morocco;Laboratory of Engineering, Molecular Organic Materials and Environment, Faculty of Sciences Dhar El Mahraz, University Sidi Mohamed Ben Abdallah, Fez 30000, Morocco;Research Centre for Food and Nutrition, Council for Agricultural Research and Economics (CREA-AN), 00184 Rome, Italy;Zoology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;Zoology Department, Faculty of Science, Cairo University, Giza 12613, Egypt;

关键词: methyl orange;    discoloration rate;    electro-fenton;    experimental design;    box-behnken;    response surface;   

DOI  :  10.3390/catal12060665

来源: DOAJ

【 摘 要 】

In a batch reactor, the EF advanced oxidation decolorization of aqueous solutions of methyl orange MO, a commercial azo reactive textile dye, was investigated in the presence of two different electrodes. The evaluation included various operational variables such as the I_C current intensity (60 mA, 80 mA, and 100 mA), initial concentration of pollutant MO (20 mg/L, 40 mg/L, and 60 mg/L), initial pH of solution (3, 5, and 7), temperature of solution (20 °C, 30 °C, and 50 °C), and initial concentration of catalyst [Fe²⁺] (0.1 mM, 0.2 mM, and 0.3 mM) on the discoloration rate. A Box-Behnken Design of Experiment (BBD) was used to optimize the parameters that directly affect the Electro-Fenton (EF) process. Under the optimal experimental conditions such as [Fe²⁺] = 0.232 mM, pH = 3, I_C = 80 mA, [MO] = 60 mg/L, and T = 30 ± 0.1 °C, the maximum discoloration rate achieved was 94.9%. The discoloration of the aqueous MO solution during the treatment time was confirmed by analysis of the UV-visible spectrum. After a review of the literature on organic pollutant degradation, the EF system provided here is shown to be one of the best in terms of discoloration rate when compared to other AOPs.

【 授权许可】

Unknown