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The Effect of Graphene/TIO2 Nanomaterials on Photocatalytic Performance for Industrial Wastewater Treatment
American Journal of Chemical Engineering
Volume 6, Issue 5, September 2018, Pages: 107-120
Received: Sep. 5, 2018; Accepted: Oct. 8, 2018; Published: Nov. 6, 2018
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Abd El-Aziz Hassanin Konsowa, Department of Chemical Engineering, Alexandria University, Alexandria, Egypt
Yehia Abd El-Qadeer EL-Taweel, Department of Chemical Engineering, Alexandria University, Alexandria, Egypt
Shahinaz Ibrahim Abogaliel, Department of Chemical Engineering, Alexandria University, Alexandria, Egypt
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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.
Wastewater Treatment, Photocatalysis, Nanomaterials, Slurry Bubble Column Reactor
To cite this article
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, American Journal of Chemical Engineering. Vol. 6, No. 5, 2018, pp. 107-120. doi: 10.11648/j.ajche.20180605.15
Copyright © 2018 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License ( which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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