Hydroxyl radical induced degradation of salicylates in aerated aqueous solution

László Szabó, Tünde Tóth, Renáta Homlok, Gergely Rácz, E. Takács, L. Wojnárovits

Research output: Contribution to journalArticle

8 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 2014

Fingerprint

salicylates
hydroxyl radicals
degradation
aqueous solutions
toxicity
acids
chemical detection
acetylsalicylic acid
spectrophotometry
products
hydrogen peroxide
ionizing radiation
hydrolysis
diodes
dosage
irradiation
carbon
oxygen
molecules

Keywords

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

ASJC Scopus subject areas

  • Radiation

Cite this

Hydroxyl radical induced degradation of salicylates in aerated aqueous solution. / Szabó, László; Tóth, Tünde; Homlok, Renáta; Rácz, Gergely; Takács, E.; Wojnárovits, L.

In: Radiation Physics and Chemistry, Vol. 97, 04.2014, p. 239-245.

Research output: Contribution to journalArticle

Szabó, László ; Tóth, Tünde ; Homlok, Renáta ; Rácz, Gergely ; Takács, E. ; Wojnárovits, L. / Hydroxyl radical induced degradation of salicylates in aerated aqueous solution. In: Radiation Physics and Chemistry. 2014 ; Vol. 97. pp. 239-245.
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AU - Takács, E.

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