Decolorization of reactive blue 19 dye from textile wastewater by the UV/H2O2 process

Rezaee, A ; Sharif University of Technology | 2008

353 Viewed
  1. Type of Document: Article
  2. DOI: 10.3923/jas.2008.1108.1112
  3. Publisher: Asian Network for Scientific Information , 2008
  4. Abstract:
  5. Photo-oxidation of dyes is a new concern among researchers since it offers an attractive method for decoloration of dyes and breaks them into simple mineral forms. An advanced oxidation process, UV/H2O2, was investigated in a laboratory scale photoreactor for decolorization of the Reactive blue 19 (RB19 dye from synthetic textile wastewater. The effects of operating parameters such as hydrogen peroxide dosage, pH, initial dye concentration and UV dosage, on decolorization have been evaluated. The RB19 solution was completely decolorized under optimal hydrogen peroxide dosage of 2.5 mmol L-1 and low-pressure mercury UV-C lamps (55 w) in less than 30 min. The decolorization rate followed pseudo-first order kinetics with respect to the dye concentration. The rate increased linearly with-volumetric UV dosage and nonlinearly with increasing initial hydrogen peroxide concentration. It has been found that the degradation rate increased until an optimum of hydrogen peroxide dosage, beyond which the reagent exerted an inhibitory effect. From the experimental results, the UV/H2O2 process was an effective technology for RB19 dye treatment in wastewater. © 2008 Asian Network for Scientific Information
  6. Keywords:
  7. Degradation ; Dyes ; Hydrogen ; Hydrogen peroxide ; Oxidation ; Peroxides ; Textiles ; Advanced Oxidation Processes ; Decolorization ; Decolorization rates ; Hydrogen peroxide concentration ; Initial dye concentration ; Operating parameters ; Pseudo first-order kinetics ; Reactive blue 19 ; Wastewater treatment
  8. Source: Journal of Applied Sciences ; Volume 8, Issue 6 , 2008 , Pages 1108-1112 ; 18125654 (ISSN)
  9. URL: https://scialert.net/fulltext/?doi=jas.2008.1108.1112