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Electrochemical Degradation of Organic Pollutants in the Presence of Spinel Cobalt Ferrite Nanoparticles: Investigation of the Effective Parameters and Evaluation of Degradation Kinetics

Mousavi, Sadegh | 2021

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54043 (03)
  4. University: Sharif University of Technology
  5. Department: Chemistry
  6. Advisor(s): Rahman Setayesh, Shahrbanoo
  7. Abstract:
  8. In this study, CoFe2O4/CuO nanocomposite was synthesized by hydrothermal method and utilized for removal of metronidazole in electro-Fenton process. Nanocomposite was characterized by FT-IR, XRD, FE-SEM, VSM and BET methods. The Results of XRD patterns confirmed the monoclinic structure formation for copper(Ⅱ) oxide and the spinel structure for CoFe2O4. The FE-SEM images displayed the formation of CuO nanosheets for copper(Ⅱ) oxide and the decoration of cobalt ferrite nanoparticles on the surface of CuO nanosheets. Measurement of the surface area of nanocatalysts using BET isotherm represented the high surface area for CuO nanosheets and the increase of surface area of nanocomposite in comparision with cobalt ferrite nanoparticles. The electro-Fenton process was performed in an undivided electrochemical cell with two stainlees steel electrodes and the influence of electric current intensity, initial pollutant concentration, initial pH of system, the catalyst amount and inert electrolyte parameters was investigated for the determination of optimum conditions. At the optimum conditions ( I= 0.2A, pH= 3, catalyst= 0.05 g and sodium sulfate= 0.05M ) and initial concentration of metronidazole: 100 ppm, the MNZ removal efficiency reached 93% after 120 min and COD removal reached 59% after 120 min and 90% after 300 min electro-Fenton process. The investigation of nanocomposite performance in the degradation of levofloxacin and methyl orange was showed the efficiency of 95% and 98%, respectively. Electro-Fenton process in the presence of different salts such as NaCl and NaNO3 showed the increase in the degradation performance. The assessment of stability of nanocomposite by leaching and reusability tests displayed high stability and reusability for CoFe2O4/CuO nanocomposite. Also, the kinetics studies represented that the degradation of metronidazole antibiotics by electro-fenton process followed pseudo first order kinetics.


  9. Keywords:
  10. Chemical Kinetic ; Metronidasole ; Electro-Fenton Method ; Advanced Electrochemical Oxidation ; Cobalt Ferrite/Copper Oxide (CoFe2O4/CuO)Nanocomposite ; Hydrothermal Synthesis ; Methyl Orange

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