Photocatalytic Degradation of Orange II in Aqueous Iron-Rich Montmorillonite Solutions
Publication: Journal of Environmental Engineering
Volume 136, Issue 1
Abstract
In this work the photodegradation of orange II was carried out in the presence of iron-rich montmorillonite (MMt) (2.24% ) using a 15-W low-pressure ultraviolet lamp . The effects of pH, MMt dose, and dye concentration were studied. A low pH value is favorable for the decolorization of orange II. The hydroxyl radical concentration increased with increasing concentration of MMt in aqueous solutions in the range of 0–1.5 g/L. Concentrations higher than 5.0 g/L MMt inhibited the production. There was no significant decrease in photocatalytic activity when the catalyst was reused. Hydroxyl radicals were detected by tert-butyl alcohol in aqueous MMt suspensions under ultraviolet irradiation and were responsible for the degradation of orange II. Free iron ions dissolved in MMt suspensions, structural iron in the MMt structural and the charged surface of nanoclay are responsible for the hydroxyl radical production. Free iron ions dissolved in solution plays a predominant role in the degradation of orange II. This study shows that iron-rich MMt is a potential photocatalyst for dye wastewater treatment.
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References
AlHamedi, F. H., Rauf, M. A., and Ashraf, S. S. (2009). “Degradation studies of Rhodamine B in the presence of .” Desalination, 239, 159–166.
American Public Health Association (APHA), American Water Works Association (AWWA), and Water Pollution Control Federation (WPCF). (1992). Standard methods for the examination of water and wastewater, 18th Ed., APHA, AWWA, and WPCF, Washington, D.C.
Ay, F., Catalkaya, E. C., and Kargi, F. (2009). “A statistical experiment design approach for advanced oxidation of direct red azo-dye by photo-Fenton treatment.” J. Hazard. Mater., 162(1), 230–236.
Deng, N. S., Wu, F., Fang, T., and Tian, S. (1996). “Photodegradation of dyes in aqueous solutions containing Fe(III)-hydroxy complex. I: Photodegradation kinetics.” Chemosphere, 33(3), 547–557.
Fox, M. A., and Dulay, M. T. (1993). “Heterogeneous photocatalysis.” Chem. Rev. (Washington, D.C.), 93, 341–357.
Gournis, D., Karakassides, M. A., and Petridis, D. (2002). “Formation of hydroxyl radicals catalyzed by clay surfaces.” Phys. Chem. Miner., 29, 155–158.
Hu, M. Q., and Xu, Y. M. (2004). “Photocatalytic degradation of textile dye X3B by heteropolyoxometalate acids.” Chemosphere, 54(3), 431–434.
Kiwi, J., Lopez, A., and Nadtochenko, V. (2000). “Mechanism and kinetics of the OH-radical intervention during Fenton oxidation in the presence of a significant amount of radical scavenger .” Environ. Sci. Technol., 34(11), 2162–2168.
Liu, Y. X., Li, J., Wu, F., Zhang, C. B., and Deng, N. S. (2008). “Insight into heterogeneous photocatalytic degradation of phenol over montmorillonite KSF.” Chem. Eng. Commun., 195(8), 1–10.
Lucarelli, L., Nadtochenko, V., and Kiwi, J. (2000). “Environmental photochemistry: Quantitative adsorption and FTIR studies during the -photocatalyzed degradation of orange II.” Langmuir, 16, 1102–1108.
Marto, J., São Marcos, P., Trindade, T., and Labrincha, J. A. (2009). “Photocatalytic decoloration of Orange II by ZnO active layers screen-printed on ceramic tiles.” J. Hazard. Mater., 163, 36–42.
Morlat-Therias, S., Mailhot, B., Gardette, J. L., Silva, C. D., Haidar, B., and Vidal, A. (2005). “Photooxidation of ethylene-propylene-diene/montmorillonite nanocomposites.” Polym. Degrad. Stab., 90(1), 78–85.
Panizza, M., and Cerisola, G. (2009). “Electro-Fenton degradation of synthetic dyes.” Water Res., 43(2), 339–344.
Park, H., and Choi, W. (2004). “Effects of surface fluorination on photocatalytic reactions and photoelectrochemical behaviors.” J. Phys. Chem. B, 108(13), 4086–4093.
Petigara, B. R., Blough, N. V., and Mignerey, A. C. (2002). “Mechanisms of hydrogen peroxide decomposition in soils.” Environ. Sci. Technol., 36, 639–645.
Ramirez, J. H., Duarte, F. M., Martins, F. G., Costa, C. A., and Madeira, L. M. (2008). “Modelling of the synthetic dye orange II degradation using Fenton’s reagent: From batch to continuous reactor operation.” Chem. Eng. J., 148, 394–404.
Sarla, M., Pandita, M., Tyagib, D. K., and Kapoora, J. C. (2004). “Oxidation of cyanide in aqueous solution by chemical and photochemical process.” J. Haz. Mater., 116, 49–56.
Shield, S. R., and Harris, J. M. (2000). “Reaction kinetics at dispersed-colloid/solution interfaces: Benzophenone triplet-state quenching by methylated silica particles.” J. Phys. Chem. B, 104, 8527–8535.
Song, W., Cheng, M., Ma, J., Ma, W., Chen, C., and Zhao, J. (2006). “Decomposition of hydrogen peroxide driven by photochemical cycling of iron species in clay.” Environ. Sci. Technol., 40, 4782–4787.
Van Grieken, R., Aguado, J., López-Muňoz, M. J., and Marugán, J. (2005). “Photocatalytic degradation of iron-cyanocomplexes by based catalysts.” Appl. Catal., B, 55, 201–211.
Wu, F., and Deng, N. S. (2000). “Photochemistry of hydrolytic iron (III) species and photoinduced degradation of organic compounds.” Chemosphere, 41(8), 1137–1147.
Wu, F., Deng, N. S., and Hua, H. L. (2000). “Degradation mechanism of azo dye C.I. reactive red 2 by iron powder reduction and photooxidation in aqueous solutions.” Chemosphere, 41(8), 1233–1238.
Wu, F., Li, J., Peng, Z. E., and Deng, N. S. (2008). “Photochemical formation of hydroxyl radicals catalyzed by montmorillonite.” Chemosphere, 72(3), 407–413.
Zuo, Y. G., and Hoigné, J. (1992). “Formation of hydrogen peroxide and depletion of oxalic acid in atmospheric water by photolysis of iron(III)-oxalato complexes.” Environ. Sci. Technol., 26, 1014–1022.
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© 2010 ASCE.
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Received: Oct 8, 2008
Accepted: May 26, 2009
Published online: May 30, 2009
Published in print: Jan 2010
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