Phototransformation of ibuprofen and ketoprofen in aqueous solutions

R. K. Szabó, C. S. Megyeri, E. Illés, K. Gajda-Schrantz, P. Mazellier, A. Dombi

Research output: Contribution to journalArticle

83 Citations (Scopus)

Abstract

The UV (254. nm) and UV/VUV (254/185. nm) photolysis of two anti-inflammatory drugs, ibuprofen and ketoprofen, have been studied in aqueous solutions as a possible process for the removal of non-biodegradable compounds.We have examined the effects of dissolved oxygen and initial target concentration. Upon irradiation at 254. nm, the decomposition rate of ketoprofen is almost forty times higher as it of ibuprofen whilst VUV irradiation only increased the ibuprofen decomposition rate. The presence of dissolved oxygen accelerated the photodegradation of ibuprofen, whereas no effect was observed on the degradation of ketoprofen. The maximum quantum yield for the phototransformation was 0.2. The rate of mineralization in both cases was ~60%, even after 1. h of treatment and this suggests the formation of stable by-products which were identified using GC-MS and HPLC-MS, respectively.

Original languageEnglish
Pages (from-to)1658-1663
Number of pages6
JournalChemosphere
Volume84
Issue number11
DOIs
Publication statusPublished - Sep 1 2011

Keywords

  • Degradation products
  • Ibuprofen
  • Ketoprofen
  • UV photolysis
  • UV/VUV photolysis

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis

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