Degradation of the pharmaceutical Metronidazole via UV, Fenton and photo-Fenton processes


Shemer H., Kunukcu Y., Linden K.

CHEMOSPHERE, cilt.63, sa.2, ss.269-276, 2006 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 63 Sayı: 2
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1016/j.chemosphere.2005.07.029
  • Dergi Adı: CHEMOSPHERE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.269-276
  • Anahtar Kelimeler: advanced oxidation, pharmaceuticals, Fenton, photolysis, ultraviolet, ADVANCED OXIDATION PROCESSES, AQUATIC ENVIRONMENT, THERAPEUTIC DRUGS, WATER, FATE, RESIDUES, HORMONES, REMOVAL, SEWAGE
  • Akdeniz Üniversitesi Adresli: Hayır

Özet

Degradation rates and removal efficiencies of Metronidazole using UV, UV/H2O2, H2O2/Fe2+, and LTV/H2O2/Fe2+ were studied in de-ionized water. The four different oxidation processes were compared for the removal kinetics of the antimicrobial pharmaceutical Metronidazole. It was found that the degradation of Metronidazole by UV and UV/ H2O2 exhibited pseudo-first order reaction kinetics. By applying H2O2/Fe2+, and UV/H2O2/Fe2+ the degradation kinetics followed a second order behavior. The quantum yields for direct photolysis, measured at 254 mn and 200400 nm, were 0.0033 and 0.0080 mol E-1, respectively. Increasing the concentrations of hydrogen peroxide promoted the oxidation rate by UV/ H2O2. Adding more ferrous ions enhanced the oxidation rate for the H2O2/Fe2+ and UV/H2O2/Fe2+ processes. The major advantages and disadvantages of each process and the complexity of comparing the various advanced oxidation processes on an equal basis are discussed. (c) 2005 Published by Elsevier Ltd.