Decolorization and Mineralization of Basic Dye using Nanophotocatalysis: Pilot Scale Study

Authors

1 Department of Environmental Research, Institute for Color Science and Technology

2 Textile Engineering Department, Amirkabir University of Technology

3 Department of Organic Colorants;Center of Excellence for Color science and Technology, Institute for Color Science and Technology

4 Department of Organic Colorants, Institute for Color Science and Technology

Abstract

In this research, decolorization and mineralization of Basic Blue 41 (BB 41) were investigated by nanophotocatalytic process using immobilized titania nanoparticles in a batch photoreactor. Photocatalytic decolorization and mineralization processes of dye solutions were performed at pilot scale (10 L). To obtain the details of the photocatalytic degradation of BB 41, UV-Vis and Ion Chromatography (IC) analyses were employed. The effects of major variables governing the efficiency of the process such as H2O2 dosage, dye concentration and anions (NO3-, Cl-, SO42-, HCO3- and CO32-) were investigated. Kinetic analysis indicates that the photocatalytic decolorization rates can usually be approximated first-order model. The nitrate and sulfate anions were measured as photocatalytic mineralization products of BB 41. The results show that the employment of desired operational parameters may lead to complete decolorization and mineralization of BB 41 at pilot scale.

Keywords

References

  1. N. M. Mahmoodi, M. Arami, Bulk phase degradation of Acid Red 14 by nanophotocatalysis using immobilized titanium (IV) oxide nanoparticles. J. Photochem. Photobiol. A: Chem. 182(2006), 60–66.
  2. M. A. Behnajady, N. Modirshahla,  N. Daneshvar, M. Rabbani, Photocatalytic degradation of an azo dye in a tubular continuous-flow photoreactor with immobilized TiO2 on glass plates. Chem. Eng. J. 127(2007), 167-176.
  3. J. Saien, A. R Soleymani, Degradation and mineralization of Direct Blue 71 in a circulating upflow reactor by UV/TiO2 process and employing a new method in kinetic study. J. Hazard. Mater. 144(2007), 506-512.
  4. T. Robinson, B. Chandran, P. Nigam, Removal of dyes from a synthetic textile dye effluent by biosorption on apple pomace and wheat straw. Water Res. 36(2002), 2824–2830.
  5. D. Mohan, K. P. Singh, G. Singh, G. Singh, K. Kumar, Removal of dyes from wastewater using flyash, a low-cost adsorbent. Ind. Eng. Chem. Res. 41(2002), 3688–3695.
  6. P. Nigam, G. Armour, I. M. Banat, D. Singh, R. Marchant, Physical removal of textile dyes and solid state fermentation of dye-adsorbed agricultural residues. Bioresour. Technol. 72(2000), 219–226.
  7. K. R. Ramakrishna, T. Viraraghavan, Dye removal using low cost adsorbents. Water Sci. Technol. 36(1997), 189–196.
  8. M. R. Hoffmann, S. T. Martin, W. Choi, D. W. Bahnemann, Environmental applications of semiconductor photo-catalysis. Chem. Rev. 95(1995), 69-96.
  9. I. K. Konstantinou, T. A. Albanis, TiO2-assisted photo-catalytic degradation of azo dyes in aqueous solution: kinetic and mechanistic investigations - a review. Appl. Catal. B: Environ. 49(2004), 1-14.
  10. I. Arsalan-Alaton, A review of the effects of dye-assisting chemicals on advanced oxidation of reactive dyes in wastewater. Color. Technol. 119(2003), 345-353.
  11. K. Tanaka, S. M. Robledo, T. Hisanaga, R. Ali, Z. Ramli, W. A. Bakar, Photocatalytic degradation of 3,4-xylyl N-methylcarbamate (MPMC) and other carbamate pesticides in aqueous TiO2 suspensions. J. Mol. Catal A: Chem. 144 (1999), 425–30.
  12. A. Houas, H. Lachheb, M. Ksibi, E. Elaloui, C. Guillard, J. M. Hermann, Photocatalytic degradation pathway of Methylene Blue in Water. Appl. Catal. B: Environ. 31(2001), 145-157.
Journal of Color Science and Technology
Volume 1, Issue 1
October 2007
Pages 1-6

Files

Share

How to cite

Statistics