American Journal of Chemical Engineering

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The Effect of Graphene/TIO2 Nanomaterials on Photocatalytic Performance for Industrial Wastewater Treatment

Received: 05 September 2018    Accepted: 08 October 2018    Published: 06 November 2018
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Abstract

The aim of the present work is to combine TiO2/Graphene to increase photo-catalytic activity and obtain efficient removal of direct red 23 azo dye without difficult synthesis. Many operating variables which affect the process and some design aspects were studied. Reactor geometry is the main design parameter where slurry rectangular reactor and bubble column were compared with respect to hydrodynamic regimes, overall degradation efficiency and applicability in industrial scale. The removal rate was found to increase with increase in TiO2 concentration, approaching a limiting value at catalyst loads of 3g/L. For rectangular reactor only 0.005g/L of rGO able to enhance the activity of photo-catalysis. However, the optimum concentration of rGO is decreased in the bubble column reactor to be 0.001g/L. In both reactor systems, photocatalytic activity increase significantly by decreasing wavelength of the irradiated lamp from 365 nm to 254 nm. Also, results show the ability of bubble column reactor to treat high concentrations of dye up to 200 ppm. That makes it suitable to be integrated with biological system to convert non-biodegradable contaminates into biodegradable organics. That reduces the operating cost of the process and makes it more applicable in industrial scale. Rectangular reactor has the ability to be modified to use sunlight instead of artificial lamps because of high surface exposed to sunlight. In general the performance of bubble column reactor was better than rectangular reactor because it has excellent mass transfer characteristics, which enhance the efficiency of the process.

DOI 10.11648/j.ajche.20180605.15
Published in American Journal of Chemical Engineering (Volume 6, Issue 5, September 2018)
Page(s) 107-120
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Wastewater Treatment, Photocatalysis, Nanomaterials, Slurry Bubble Column Reactor

References
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Author Information
  • Department of Chemical Engineering, Alexandria University, Alexandria, Egypt

  • Department of Chemical Engineering, Alexandria University, Alexandria, Egypt

  • Department of Chemical Engineering, Alexandria University, Alexandria, Egypt

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  • APA Style

    Abd El-Aziz Hassanin Konsowa, Yehia Abd El-Qadeer EL-Taweel, Shahinaz Ibrahim Abogaliel. (2018). The Effect of Graphene/TIO2 Nanomaterials on Photocatalytic Performance for Industrial Wastewater Treatment. American Journal of Chemical Engineering, 6(5), 107-120. https://doi.org/10.11648/j.ajche.20180605.15

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    ACS Style

    Abd El-Aziz Hassanin Konsowa; Yehia Abd El-Qadeer EL-Taweel; Shahinaz Ibrahim Abogaliel. The Effect of Graphene/TIO2 Nanomaterials on Photocatalytic Performance for Industrial Wastewater Treatment. Am. J. Chem. Eng. 2018, 6(5), 107-120. doi: 10.11648/j.ajche.20180605.15

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    AMA Style

    Abd El-Aziz Hassanin Konsowa, Yehia Abd El-Qadeer EL-Taweel, Shahinaz Ibrahim Abogaliel. The Effect of Graphene/TIO2 Nanomaterials on Photocatalytic Performance for Industrial Wastewater Treatment. Am J Chem Eng. 2018;6(5):107-120. doi: 10.11648/j.ajche.20180605.15

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  • @article{10.11648/j.ajche.20180605.15,
      author = {Abd El-Aziz Hassanin Konsowa and Yehia Abd El-Qadeer EL-Taweel and Shahinaz Ibrahim Abogaliel},
      title = {The Effect of Graphene/TIO2 Nanomaterials on Photocatalytic Performance for Industrial Wastewater Treatment},
      journal = {American Journal of Chemical Engineering},
      volume = {6},
      number = {5},
      pages = {107-120},
      doi = {10.11648/j.ajche.20180605.15},
      url = {https://doi.org/10.11648/j.ajche.20180605.15},
      eprint = {https://download.sciencepg.com/pdf/10.11648.j.ajche.20180605.15},
      abstract = {The aim of the present work is to combine TiO2/Graphene to increase photo-catalytic activity and obtain efficient removal of direct red 23 azo dye without difficult synthesis. Many operating variables which affect the process and some design aspects were studied. Reactor geometry is the main design parameter where slurry rectangular reactor and bubble column were compared with respect to hydrodynamic regimes, overall degradation efficiency and applicability in industrial scale. The removal rate was found to increase with increase in TiO2 concentration, approaching a limiting value at catalyst loads of 3g/L. For rectangular reactor only 0.005g/L of rGO able to enhance the activity of photo-catalysis. However, the optimum concentration of rGO is decreased in the bubble column reactor to be 0.001g/L. In both reactor systems, photocatalytic activity increase significantly by decreasing wavelength of the irradiated lamp from 365 nm to 254 nm. Also, results show the ability of bubble column reactor to treat high concentrations of dye up to 200 ppm. That makes it suitable to be integrated with biological system to convert non-biodegradable contaminates into biodegradable organics. That reduces the operating cost of the process and makes it more applicable in industrial scale. Rectangular reactor has the ability to be modified to use sunlight instead of artificial lamps because of high surface exposed to sunlight. In general the performance of bubble column reactor was better than rectangular reactor because it has excellent mass transfer characteristics, which enhance the efficiency of the process.},
     year = {2018}
    }
    

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  • TY  - JOUR
    T1  - The Effect of Graphene/TIO2 Nanomaterials on Photocatalytic Performance for Industrial Wastewater Treatment
    AU  - Abd El-Aziz Hassanin Konsowa
    AU  - Yehia Abd El-Qadeer EL-Taweel
    AU  - Shahinaz Ibrahim Abogaliel
    Y1  - 2018/11/06
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    DO  - 10.11648/j.ajche.20180605.15
    T2  - American Journal of Chemical Engineering
    JF  - American Journal of Chemical Engineering
    JO  - American Journal of Chemical Engineering
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    EP  - 120
    PB  - Science Publishing Group
    SN  - 2330-8613
    UR  - https://doi.org/10.11648/j.ajche.20180605.15
    AB  - The aim of the present work is to combine TiO2/Graphene to increase photo-catalytic activity and obtain efficient removal of direct red 23 azo dye without difficult synthesis. Many operating variables which affect the process and some design aspects were studied. Reactor geometry is the main design parameter where slurry rectangular reactor and bubble column were compared with respect to hydrodynamic regimes, overall degradation efficiency and applicability in industrial scale. The removal rate was found to increase with increase in TiO2 concentration, approaching a limiting value at catalyst loads of 3g/L. For rectangular reactor only 0.005g/L of rGO able to enhance the activity of photo-catalysis. However, the optimum concentration of rGO is decreased in the bubble column reactor to be 0.001g/L. In both reactor systems, photocatalytic activity increase significantly by decreasing wavelength of the irradiated lamp from 365 nm to 254 nm. Also, results show the ability of bubble column reactor to treat high concentrations of dye up to 200 ppm. That makes it suitable to be integrated with biological system to convert non-biodegradable contaminates into biodegradable organics. That reduces the operating cost of the process and makes it more applicable in industrial scale. Rectangular reactor has the ability to be modified to use sunlight instead of artificial lamps because of high surface exposed to sunlight. In general the performance of bubble column reactor was better than rectangular reactor because it has excellent mass transfer characteristics, which enhance the efficiency of the process.
    VL  - 6
    IS  - 5
    ER  - 

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