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Electrosorption and photocatalytic one-stage combined process using a new type of nanosized TiO2/activated charcoal plate electrode

  • Electrochemical advanced oxidation processes for removal of toxic/persistent organic pollutants from water
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Abstract

In the present study, an activated charcoal (AC) plate was prepared by physical activation method. Its surface was coated with TiO2 nanoparticles by electrophoretic deposition (EPD) method. The average crystallite size of TiO2 nanoparticles was determined approximately 28 nm. The nature of prepared electrode was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Brunauer–Emmett–Teller (BET) surface area measurement before and after immobilization. The electrosorption and photocatalytic one-stage combined process was investigated in degradation of Lanasol Red 5B (LR5B), and the effect of dye concentration, electrolyte concentration, pH, voltage, and contact time was optimized and modeled using response surface methodology (RSM) approach. The dye concentration of 30 mg L−1, Na2SO4 concentration of 4.38 g L−1, pH of 4, voltage of 250 mV, and contact time of 120 min were determined as optimum conditions. Decolorization efficiency increased in combined process to 85.65 % at optimum conditions compared to 66.03 % in TiO2/AC photocatalytic, 20.09 % in TiO2/AC electrosorption, and 1.91 % in AC photocatalytic processes.

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Acknowledgments

This paper is published as part of a research project supported by the University of Tabriz Research Affairs Office. The authors would like to express their gratitude to the University of Tabriz for financial and other supports provided in the implementation of this research project.

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Authors and Affiliations

  1. Research Laboratory of Environment Protection Technology, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran

    Baharak Ayoubi-Feiz & Soheil Aber

  2. Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran

    Alireza Khataee

  3. Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran

    Esmaeel Alipour

Authors
  1. Baharak Ayoubi-Feiz
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  2. Soheil Aber
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  3. Alireza Khataee
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  4. Esmaeel Alipour
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Corresponding author

Correspondence to Alireza Khataee.

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Responsible editor: Philippe Garrigues

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Ayoubi-Feiz, B., Aber, S., Khataee, A. et al. Electrosorption and photocatalytic one-stage combined process using a new type of nanosized TiO2/activated charcoal plate electrode. Environ Sci Pollut Res 21, 8555–8564 (2014). https://doi.org/10.1007/s11356-014-2777-z

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  • DOI: https://doi.org/10.1007/s11356-014-2777-z

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