Electrochemical Monitoring of Decolorization of Diazo Dye Evans Blue by Fenton Process under Anaerobic Conditions: Kinetics and Optimization

Arat C., Biçer E.

RUSSIAN JOURNAL OF ELECTROCHEMISTRY, vol.51, no.8, pp.730-742, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 51 Issue: 8
  • Publication Date: 2015
  • Doi Number: 10.1134/s1023193515080029
  • Journal Name: RUSSIAN JOURNAL OF ELECTROCHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.730-742
  • Keywords: Evans blue, Fenton process, anaerobic media, decolorization, kinetics, voltammetry, AZO-DYE, AQUEOUS-SOLUTION, CARDIOVASCULAR-DISEASE, SYNTHETIC DYES, MERCURY, IRON, OXIDATION, DEGRADATION, CORONARY, PARAMETERS
  • Ondokuz Mayıs University Affiliated: Yes

Abstract

The decolorization of Evans Blue (EB), a diazo dye, by Fenton process under anaerobic conditions has been investigated using cyclic voltammetry technique. Effects of solution pH, concentrations of H2O2, Fe2+ and EB on the decolorization of EB have also been studied. About 98.9% decolorization was found under the optimal conditions [EB] : [Fe2+] : [H2O2] = 1 : 1.9 : 4.7 and [H2O2]/[Fe2+] = 2.5 at pH 2 in 403 seconds. The kinetic data at pH 2 revealed that Behnajady-Modirshahla-Ghanbery (BMG) model was more favorable to describe the decolorization of EB than the zero-, first- and second- order kinetic models. Our experimental results will provide a fundamental knowledge for the more effective treatment of EB in a short time by Fenton's reagent.