Hydroxyl radical induced degradation of salicylates in aerated aqueous solution

László Szabó, Tünde Tóth, Renáta Homlok, Gergely Rácz, Erzsébet Takács, László Wojnárovits

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Ionizing radiation induced degradation of acetylsalicylic acid, its hydrolysis product salicylic acid and a salicylic acid derivative 5-sulpho-salicylic acid, was investigated in dilute aqueous solutions by UV-vis spectrophotometry, HPLC separation and diode-array or MS/MS detection, chemical oxygen demand, total organic carbon content and by Vibrio fischeri toxicity measurements. Hydroxyl radicals were shown to degrade these molecules readily, and first degradation products were hydroxylated derivatives in all cases. Due to the by-products, among them hydrogen peroxide, the toxicity first increased and then decreased with the absorbed dose. With prolonged irradiation complete mineralization was achieved.

Original languageEnglish
Pages (from-to)239-245
Number of pages7
JournalRadiation Physics and Chemistry
Volume97
DOIs
Publication statusPublished - Apr 1 2014

Keywords

  • Acetylsalicylic acid
  • Advanced oxidation processes
  • Degradation
  • Hydroxyl radical
  • Salicylic acid

ASJC Scopus subject areas

  • Radiation

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