Photo catalytic degradation of methylene blue in aqueous solutions using TiO2 nanoparticles

Paper Details

Research Paper 01/12/2013
Views (365) Download (8)

Photo catalytic degradation of methylene blue in aqueous solutions using TiO2 nanoparticles

Majid Aliabadi, Mohsen Hajiabadi
J. Bio. Env. Sci.3( 12), 8-12, December 2013.
Certificate: JBES 2013 [Generate Certificate]


Colored wastewater from dyeing and textile industry is one of the most important sources of environmental pollution. Using appropriate methods to remove toxic pollutants from industrial wastewater is necessary for the environment. In the present study, photo catalytic degradation of Methylene blue in aqueous solutions using nanoparticles of TiO2 was investigated. The effects of operating conditions such as initial dye concentration, solution pH, and catalyst loading and different sources of UV irradiation were investigated. The results revealed that catalyst loading of 0.2 g/l was the optimum and further increase in the TiO2 loading reduced removal efficiency. In addition, higher degradation rate was observed at pH=5. The order of degradation rate using different sources of UV irradiation was shown to be UV-C > UV-A > UV-LEDs.


Al-Momani F, Touraud E, Degorce-Dumas JR, Roussy J, Thomas O. 2002. Biodegradability enhancement of textile dyes and textile wastewater by UV photolysis. Journal of Photochemistry and Photobiology A: Chemistry 153, 191-197.

Azbar N, Yonar T, Kestioglu K. 2004. Comparison of various advanced oxidation processes and chemical treatment methods for COD and color removal from a polyester and acetate fiber dyeing effluent. Chemosphere 55, 35-43.

Bauer C, Jacques P, Kalt A. 2001. Photo oxidation of an azo dye induced by visible light incident on the surface of TiO2. Journal of Photochemistry and Photobiology A: Chemistry 140, 87–92.

Cesconeto ST, Jose NG, Moreira RFPM. 2002. Kinetics  of  photocatalytic  degradation  of  reactive dyes in a TiO2 slurry reactor. Journal of photochemical and photobiology 149,147-154.

Ghaly MY, Jamil TS, El-Seesy IE, Souaya ER, Nasr RA. 2011. Treatment of highly polluted paper mill wastewater by solar photocatalytic oxidation with synthesized nano TiO2. Chemical Engineering Journal 168, 446–454.

Kamble SP, Sawant SB, Pangarkar VG. 2003. Photocatalytic and photochemical degradation of aniline using titanium dioxide and concentrated solar radiations. Journal of Chemical Technology and Biotechnology 78, 865-872.

Lachheb H, Puzenat E, Houas A, Ksibi M. 2002. Photocatalytic degradation of various types of dyes in water by UV-irradiated titania. Applied Catalysis B: Environmental 39, 75-90.

Tang C, Chen V. 2004. The photocatalytic degradation of reactive black 5 using TiO2/ UV in an annular photoreactor. Water Research 38, 2775-2781.

Wong YC, Szeto YS, Cheung WH, McKay G. 2004. Equilibrium studies for acid dye adsorption onto chitosan. Langmuir 39, 693-702.