In this work a detailed investigation of heterogeneous photocatalytic degradation of Navy blue HE2R 1 (NB), azo dye of the reactive class is presented using UV/TiO2/H2O2 process in the aqueous suspension under 8W low-pressure mercury vapor lamp irradiation. Here we also report about optimization of various experimental parameters such as effect of catalyst concentration, effect of substrate concentration, effect of H2O2 addition. The effect of the UV/TiO2/H2O2 process employment and selection of optional operational parameters on complete decolorization and substantial decrease of Chemical Oxygen Demand (COD) and Total Organic Carbon (TOC) of dye solution has been established.
[1] Zollinger H.: Color Chemistry. VCH Publishers., New York 1991.
[2] Habibi M., Hassanzadesh A. and Mahdavi S.: J. Photochem. and Photobiol. A., 2005, 172, 89.
[3] Yang Y., Guo Y., Hu C., Wang Y. et al.: Appl. Catalysis A., 2004, 27, 201.
[4] Park H. and Choi W.: J. Photochem. and Photobiol. A., 2003, 159, 241.
[5] Chung K. and Cerniglia C.: Mutat. Res., 1992, 277, 201.
[6] Sauer T., Cesconeto G., Jose H. et al.: J. Photochem. and Photobiol. A., 2002, 149, 147.
[7] Davis R., Gainer J., Neal G. and Wu I.: Water Environ. Res., 1994, 66, 50.
[8] Aleboyed A., Aleboyeh H. and Moussa Y.: Environ. Chem. Lett. 1., 2003, 161.
[9] Legrini O., Oliveros E. and Braun A.: Chem. Rev., 1993, 93, 671.
[10] Schiavello M. (Ed.): Heterogenous Photocatalysis. Wiley Series in Photoscience and Photoengineering, John Wiley & Sons, Chichester 1997.
[11] Vincenzo A., Marta L., Leonardo P. and Javier S.: J. Photochem. and Photobiol. C, 2006, 7, 127.
[12] Fujishima A., Rao T. and Tryk D.: J. Photochem. and Photobiol. C, 2000, 1, 1.
[13] Franson H.: Standards Methods for the Examination of Water and Wastewater. 17th edn., American Public Health Association, Washington D.C 1989.
[14] Dominguez J., Beltra J. and Rodriguez O.: Catalysis Today, 2005, 101, 389.
[15] Subramani K., Byrappa K., Ananda S., Rai K. et al.: Bull. Mater. Sci., 2007, 30, 37.
[16] Lodha S., Vaya D., Ameta R. and Punjabi P.: J. Serb. Chem. Soc., 2008, 73, 631.
[17] Shintre S. and Thakur P.: J. Environ. Sci. Eng., 2008, 50, 299.