Degradation of reactive azo dye by UV/peroxodisulfate system: an experimental design approach



In the present study, UV and UV/S2O8 2− have been applied to decolorize and mineralize organic dye C. I. Reactive Red 45 (RR 45) in aqueous solution. The rate of color removal was studied by measuring the absorbance at the characteristic wavelength while mineralization rates were obtained on the basis of total organic carbon (TOC). A statistical study of the process was performed using an experimental design method, particularly a response surface methodology (RSM) hexagonal design. Optimal operating conditions were established; pH 5 to pH 7 and [K2S2O8] = 15 mM. A complete color removal was achieved in all studied combinations of process parameters, while almost complete mineralization can be achieved at established optimal process conditions. According to the developed statistical model of the process and performed kinetic study, experimental data were fitted into a model of homogeneous system.


Organic azo dye AOPs UV/S2O82− Experimental design Total organic carbon Decolorization 



We would like to acknowledge financial support from the Ministry of Science, Education and Sport, Republic of Croatia. We are also grateful to dr Ana Loncaric Bozic for useful comments about this study.

Supplementary material

11144_2010_174_MOESM1_ESM.doc (507 kb)
Supplementary material 1 (DOC 507 kb)


  1. 1.
    Konstantinou IK, Albanis TA (2004) TiO2-assisted photocatalytic degradation of azo dyes in aqueous solution: kinetic and mechanistic investigations—a review. Appl Catal B 49:1–14CrossRefGoogle Scholar
  2. 2.
    Ch-H Wu (2008) Effects of operational parameters on the decolorization of C.I. Reactive Red in UV/TiO2-based systems. Dyes Pigment 77:31–38CrossRefGoogle Scholar
  3. 3.
    Gottlieb A, Shaw C, Smith A, Wheatley A, Forsythe S (2003) The toxicity of textile reactive azo dyes after hydrolysis and decolourisation. J Biotechnol 101:49–56CrossRefGoogle Scholar
  4. 4.
    Lourenco ND, Novais JM, Pinheiro HM (2001) Effect of some operational parameters on textile dye biodegradation in sequential batch reactor. J Biotechnol 89:163–174CrossRefGoogle Scholar
  5. 5.
    Forgacs E, Cserhati T, Oros G (2004) Removal of synthetic dyes from wastewaters: a review. Environ Int 30:953–971CrossRefGoogle Scholar
  6. 6.
    Neamtu M, Yediler A, Siminiceanu I, Macoveanu M, Kettrup A (2004) Decolorization of disperse red 354 azo dye in water by several oxidation processes—a comparative study. Dyes Pigment 60:61–68CrossRefGoogle Scholar
  7. 7.
    Daneshvar N, Salari D, Khataee AR (2003) Photocatalytic degradation of azo dye Acid Red 14 in water: investigation of the effect of operational parameters. J Photochem Photobiol A 157:111–116CrossRefGoogle Scholar
  8. 8.
    Gogate PR, Pandit AB (2004) A review of imperative technologies for wastewater treatment I: oxidation technologies at ambient conditions. Adv Environ Res 8:501–551CrossRefGoogle Scholar
  9. 9.
    Daneshvar N, Rasoulifard MH, Khataee AR, Hosseinzadeh F (2007) Removal of C.I. Acid Orange 7 from aqueous solution by UV irradiation in the presence of ZnO nanopowder. J Hazard Mater 143:95–101CrossRefGoogle Scholar
  10. 10.
    McCallum JEB, Madison SA, Alkan S, Depinto RL, Wahl RU (2000) Analytical studies on the oxidative degradation of the reactive textile dye. Environ Sci Technol 34:5157–5164CrossRefGoogle Scholar
  11. 11.
    Lau TK, Chu W, Graham NJD (2007) The aqueous degradation of butylated hydroxyanisole by UV/S2O8: study of reaction mechanisms via dimerization and mineralization. Environ Sci Technol 41:613–619CrossRefGoogle Scholar
  12. 12.
    Myers RH, Montgomery DC (2002) Response surface methodology. process and products optimization using designed experiments. Wiley, New YorkGoogle Scholar
  13. 13.
    Grčić I, Vujević D, Šepčić J, Koprivanac N (2009) Minimization of organic content in simulated industrial wastewater by fenton type processes: a case study. J Hazard Mater 170:954–961CrossRefGoogle Scholar
  14. 14.
    Peternel I, Koprivanac N, Kusic H (2006) UV-based processes for reactive azo dye mineralization. Water Res 40:525–532CrossRefGoogle Scholar
  15. 15.
    Peternel I, Kusic H, Koprivanac N, Locke BR (2006) The roles of ozone and zeolite on reactive dye degradation in electrical discharge reactors. Environ Technol 27:545–558CrossRefGoogle Scholar
  16. 16.
    Baran W, Makowski A, aw Wardas W (2003) The influence of FeCl3 on the photocatalytic degradation of dissolved azo dyes in aqueous TiO2 suspensions. Chemosphere 53:87–95CrossRefGoogle Scholar
  17. 17.
    Grčić I, Mužic M, Vujević D, Koprivanac N (2009) Evaluation of atrazine in UV/FeZSM-5/H2O2 system using factorial experimental design. Chem Eng J 150:476–484CrossRefGoogle Scholar
  18. 18.
    Peternel I, Lončarić Božić A, Koprivanac N, Flamaceta M (2009) Degradation of C.I. Reactive Red 45 by UV-S2O8 2− system-optimization of key operational parameters. In: Progress in environmental science and technology, vol 2, part B. Science Press, Beijing, pp 1093–1098Google Scholar
  19. 19.
    Connors KA (1990) Chemical kinetics: the study of reaction rates in solution. Wiley, New YorkGoogle Scholar
  20. 20.
    Wang D, Li Y, Yang M, Han M (2008) Decomposition of polycyclic aromatic hydrocarbons in atmospheric aqueous droplets through sulfate anion radicals: an experimental and theoretical study. Sci Total Environ 393:64–71CrossRefGoogle Scholar
  21. 21.
    Horia H, Yamamotoa A, Koikea K, Kutsunaa S, Osakab I, Arakawab R (2007) Persulfate-induced photochemical decomposition of a fluorotelomer unsaturated carboxylic acid in water. Water Res 41:2961–2968Google Scholar
  22. 22.
    Salari D, Niaei A, Aber S, Rasoulifard MH (2009) The photooxidative destruction of C.I. Basic Yellow 2 using UV/S2O8 process in a rectangular continuous photoreactor. J Hazard Mater (corrected proof)Google Scholar

Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2010

Authors and Affiliations

  1. 1.Faculty of Chemical Engineering and TechnologyUniversity of ZagrebZagrebCroatia

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