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Optimization of the 3D Electro-Fenton Process in Removal of Acid Orange 10 From Aqueous Solutions by Response Surface Methodology Publisher



Mohammadi H1 ; Alinejad A2 ; Khajeh M3 ; Darvishmotevalli M3 ; Moradnia M3 ; Tehrani AM4 ; Hosseindost G5 ; Zare MR6 ; Mengelizadeh N6
Authors
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Authors Affiliations
  1. 1. Department of Environmental Health Engineering, Torbat Jam Faculty of Medical Sciences, Torbat Jam, Iran
  2. 2. Department of Public Health, Fasa University of Medical Sciences, Fasa, Iran
  3. 3. Student Research Committee and Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
  4. 4. Environment Health, Department of Environment Health, Hamadan University of Medical Sciences, Hamadan, Iran
  5. 5. Environment Health, Department of Environment Health, Kashan University of Medical Sciences, Kashan, Iran
  6. 6. Research Center of Health, Safety and Environment, Department of Environmental Health Engineering, Evaz Faculty of Health, Larestan University of Medical Sciences, Larestan, Iran

Source: Journal of Chemical Technology and Biotechnology Published:2019


Abstract

BACKGROUND: In recent decades, rapid population growth and industrial development have led to the release of toxic compounds into water resources. Several technologies have been proposed to address the problem, and among them, the 3D electro-Fenton process has found great popularity due to its high efficiency and simple operation. In the 3D electro-Fenton process, the type of particle electrode is one of the most important factors owing to its impact on the reduction of energy consumption and generation of reactive species. In the present study, the optimization of the 3D electro-Fenton process coupled with iron-coated nickel foam (NF-Fe), as a new particle electrode, in the removal of acid orange 10 was investigated using response surface methodology (RSM). RESULTS: The RSM results showed that the quadratic model has a high R2 and high F-value based on ANOVA analysis. The optimum efficiency of dye removal (99.15%) was obtained at pH 5.6, an NF-Fe dosage of 0.68 g L−1, a time of 34.6 min, and current density of 23.62 mA cm−2. Comparative tests showed the high efficiency of the 3D electro-Fenton process compared to other electrochemical systems. Quenching experiments demonstrated the production of different reactive species in the 3D process. The stability experiment proved that the NF-Fe has a high potential to improve the long-term degradation of dye. CONCLUSIONS: Due to its high efficiency, production of more reactive species and excellent stability of the NF-Fe electrode, this 3D electro-Fenton process is an excellent option for removal of dye from aqueous solutions. © 2019 Society of Chemical Industry. © 2019 Society of Chemical Industry
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