Degradation of naproxen by UV, VUV photolysis and their combination

Eszter Arany, Rita Katalin Szabó, László Apáti, Tünde Alapi, István Ilisz, Patrick Mazellier, András Dombi, Krisztina Gajda-Schrantz

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

Naproxen is a widely used nonsteroidal anti-inflammatory drug. Recently, this medicine was detected both in natural waters (up to 1.5μgL-1) and in sewage treatment plant effluents (up to 5.2μgL-1). Moreover, naproxen is only partly eliminated by classical processes used in sewage treatment plants. Therefore, its degradation is of utmost interest. Advanced oxidation processes proved to be the most suitable methods for the elimination of persistent organic contaminants. In this work ultraviolet (UV, 254nm), vacuum ultraviolet photolysis (VUV, 172nm) and their combination (UV/VUV, 254/185nm) were investigated. The efficiency of the methods increased in the following order: UV<VUV< UV/VUV photolysis. However, VUV irradiation was found to mineralize the contaminant molecule most effectively. The chemical structures of three out of four aromatic by-products and of some aliphatic carboxylic acids were presumed. The effects of dissolved O2 and the initial concentration of naproxen on the degradation were also investigated.

Original languageEnglish
Pages (from-to)151-157
Number of pages7
JournalJournal of Hazardous Materials
Volume262
DOIs
Publication statusPublished - Nov 15 2013

Keywords

  • Advanced oxidation process
  • Dissolved O
  • Mineralization
  • Naproxen
  • UV/VUV photolysis

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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