Role of reactive intermediates in the radiolytic degradation of Acid Red 1 in aqueous solution

Cs M. Földváry, L. Wojnárovits

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The role of reactive intermediates of water radiolysis (eaq-, H{radical dot}, HO{radical dot}, O2{radical dot}-/HO2{radical dot}) in decoloration and mineralization of aqueous solutions of Acid Red 1 dye was investigated. The decoloration is highly effective in the reactions of eaq- and H{radical dot}, and less effective in HO{radical dot} reactions. The O2{radical dot}-/HO2{radical dot} pair does not take part in decoloration. For mineralization, which is an oxidative degradation, HO{radical dot} radicals are needed: the efficiency increases with the dissolved oxygen concentration. The reactions of the O2{radical dot}-/HO2{radical dot} radical pair slightly increase the rate of mineralization. Iron and copper ions (possible constituents of waste waters) in low concentration do not influence the reactions.

Original languageEnglish
Pages (from-to)13-18
Number of pages6
JournalRadiation Physics and Chemistry
Volume78
Issue number1
DOIs
Publication statusPublished - Jan 1 2009

Keywords

  • Acid Red 1
  • Azo dyes
  • Azophloxine
  • Radiolysis
  • Superoxide anion

ASJC Scopus subject areas

  • Radiation

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