Presented at the 3rd International Symposium on Innovative Approaches in Scientific Studies (Engineering and Natural Sciences) (ISAS2019-ENS), Ankara, Turkey, Apr 19, 2019

SETSCI Conference Proceedings, 2019, 4, Page (s): 200-202 , https://doi.org/

Published Date: 01 June 2019    | 815     31

The photocatalytic degredation has received a great deal of attention due to its new technology for environmental pollution. Among photocatalytic semiconductors, titanium dioxide is known as a photocatalyst for the removal of environmental contaminants. In this study, granular form of the TiO2 (1-5mm diameter) which provided its powder was used to observe the methylene blue (MB) degradation. The purpose of this study is to investigate the reusability of granular TiO2 (fixed as 40 gr) as a catalyst in the removal of MB by photocatalytic oxidation process for various concentration of MB (10, 20, 30, 40, 50 mg/L) and UV-irradiation time up to 60 min. Then, photocatalytic oxidation of MB using granular TiO2 was investigated under UV irradiation. The effects of MB concentration on the color removal efficiency of the aqueous solutions were investigated. During the photocatalytic oxidation, the change in dyestuff concentration was monitored with spectrophotometer and the reaction kinetics were determined by spectrophotometric analyses. The results showed that, 87% yield was obtained using 50 mg/L MB and 40g granular TiO2 for one hour degradation time.  

Keywords - Granular TiO2; photocatalytic oxidation; degredation; methylene blue; yield

[1] R.S. Dariani, A.Esmaeili, A. Mortezaali., S. Dehghanpour “Photocatalytic reaction and degradation of methylene blue on TiO2 nano-sized particles” Optics, vol. 127, pp. 7143-7154, Sep. 2016

[2] M. Salehi, H. Hashemipour, M. Mirzaee, “Experimental Study of Influencing Factors and Kinetics in Catalytic Removal of Methylene Blue with TiO2 Nanopowder” American Journal of Environmental Engineering, Jan. 2012

[3] M. Luo, D. Bowden, P. Brimblecombe, “Removal of Dyes from Water Using a TiO2 Photocatalyst Supported on Black Sand” Water, Air and Soil Pollution, vol. 198, pp. 233-241, March 2009

[4] E.A. El-Sharkawy, Afaf Y. Soliman, Kawthr M. Al-Amer “Comparative study for the removal of methylene blue via adsorption and photocatalytic degradation” Journal of Colloid and Interface Science, vol. 310, pp. 498-508, June 2007

[5] Mohd. Rafatullah, O. Sulaiman, R. Hashim, A. Ahmad, “Adsorption of methylene blue on low-cost adsorbents: A review” Journal of Hazardous Materials, vol. 177, pp.70-80, May 2010

[6] M.H. Abdellah, S.A. Nosier, A.H. Al-Shazly, A.A.Mubarek, “Photocatalytic decolorization of methylene blue using TiO2/UV system enhanced by air sparging” Alexandria Engineering Journal, vol.57, pp. 3727-3735, Dec 2018

[7] E.Çakıroğlu, “Titanyum Dioksit Esaslı (TiO2) Fotokatalizör Kullanılarak Toksik Madde İçerikli Atık Suların Detoksifikasyonu” Metallurgy and Materials Eng., Dokuz Eylul University Graduate School of Natural and Applied Sciences, Izmir, Turkey, June 2011.

[8] E.D. Sam, M. Urgen, F.Z. Tepehan, “TiO2 fotokatalistleri” İTÜ Dergisi, Vol. 6, pp. 81-92, 2007

[9] K. Nakata, A. Fujishima, “TiO2 photocatalysis: Design and applications” Journal of Photochemistry and Photobiology C: Photochemistry Reviews, 13 (2012) 169–189