Removal of dyes using immobilized titanium dioxide illuminated by fluorescent lamps.

The photodegradation of various dyes in aqueous solution was studied. Experiments were carried out using glass coated titanium dioxide thin film as photocatalyst. Photodegradation processes of methylene blue (MB), methyl orange (MO), indigo carmine (IC), chicago sky blue 6B (CSB), and mixed dye (MD, mixture of the four mentioned single dye) were reported. As each photodegradation system is pH dependent, the photodegradation experiment was carried out in each dye photodegradation reactive pH range at approximately 28 degrees C. The dyes removal efficiency was studied and compared using UV-vis spectrophotometer analysis. The total removal of each dye was: methylene blue (90.3%), methyl orange (98.5%), indigo carmine (92.4%), chicago sky blue 6B (60.3%), and mixed dyes (70.1%), respectively. The characteristic of the photocatalyst was investigated using X-ray diffractometer (XRD). The amount of each dye intermediate produced in the photodegradation process was also determined with the help of total organic carbon (TOC) analysis.

[1]  David F. Ollis,et al.  Mixed reactant photocatalysis: Intermediates and mutual rate inhibition , 1989 .

[2]  M. Stylidi.  Pathways of solar light-induced photocatalytic degradation of azo dyes in aqueous TiO2 suspensions , 2003 .

[3]  R. W. Matthews.  Photooxidation of organic impurities in water using thin films of titanium dioxide , 1987 .

[4]  E. R. Trotman.  Dyeing And Chemical Technology Of Textile Fibres , 1985 .

[5]  Gulen Eremektar,et al.  Color removal from textile wastewaters , 1996 .

[6]  N. Serpone,et al.  Kinetics studies in heterogeneous photocatalysis. I. Photocatalytic degradation of chlorinated phenols in aerated aqueous solutions over titania supported on a glass matrix , 1988 .

[7]  Ying-xu Chen,et al.  Photodegradation of dye pollutants on silica gel supported TiO2 particles under visible light irradiation , 2004 .

[8]  R. W. Matthews.  Photocatalytic oxidation and adsorption of methylene blue on thin films of near-ultraviolet-illuminated TiO2 , 1989 .

[9]  Lisa Studnicki,et al.  Comparative photocatalytic degradation using natural and artificial UV-light of 4-chlorophenol as a representative compound in refinery wastewater , 2003 .

[10]  C. Bauer,et al.  Photooxidation of an azo dye induced by visible light incident on the surface of TiO2 , 2001 .

[11]  S. Gialanella,et al.  Sol-Gel Synthesis and Characterisation of TiO2-Anatase Powders Containing Nanometric Platinum Particles Employed as Catalysts for 4-Nitrophenol Photodegradation , 2000 .

[12]  Qiang Ke,et al.  Photocatalytic degradation of a cationic azo dye by TiO2/bentonite nanocomposite , 2002 .

[13]  Nevim San,et al.  Photocatalytic degradation of 4-nitrophenol in aqueous TiO2 suspensions: Theoretical prediction of the intermediates , 2002 .

[14]  C. Baiocchi,et al.  Characterization of methyl orange and its photocatalytic degradation products by HPLC/UV–VIS diode array and atmospheric pressure ionization quadrupole ion trap mass spectrometry , 2002 .

[15]  Nevim San,et al.  Prediction of primary intermediates and the photodegradation kinetics of 3-aminophenol in aqueous TiO2 suspensions , 2001 .

[16]  Regina de Fátima Peralta Muniz Moreira,et al.  Kinetics of photocatalytic degradation of reactive dyes in a TiO2 slurry reactor , 2002 .

[17]  L. Palmisano,et al.  Photocatalytic degradaton of phenol in aqueous polycrystalline TiO2 dispersions: the influence of Fe3+, Fe2+ and Ag+ on the reaction rate , 1991 .

[18]  M. Inagaki,et al.  A new route for preparation of TiO2-mounted activated carbon , 2003 .

[19]  Heechul Choi,et al.  Solar light induced and TiO2 assisted degradation of textile dye reactive blue 4. , 2002, Chemosphere.

[20]  C. Baiocchi,et al.  Azo-dyes photocatalytic degradation in aqueous suspension of TiO2 under solar irradiation. , 2002, Chemosphere.

[21]  Debabrata Chatterjee,et al.  Demineralization of organic pollutants on the dye modified TiO2 semiconductor particulate system using visible light , 2001 .

[22]  A. Harizanova,et al.  Development and investigation of sol–gel solutions for the formation of TiO2 coatings , 2000 .

[23]  Jincai Zhao,et al.  TiO2-assisted photodegradation of dyes: A study of two competitive primary processes in the degradation of RB in an aqueous TiO2 colloidal solution , 1998 .

[24]  H. Zollinger.  Color chemistry: Syntheses, properties, and applications of organic dyes and pigments , 1987 .

[25]  Jincai Zhao,et al.  TiO2-assisted photodegradation of dye pollutants : II. Adsorption and degradation kinetics of eosin in TiO2 dispersions under visible light irradiation , 1998 .

[26]  M. Halmann.  Photodegradation of Water Pollutants , 1995 .