Colour Changes during the Carbamazepine Oxidation by Photo-Fenton

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Villota N., Ferreiro C., Qulatein H. A., Lomas J. M., Camarero L. M., Lombrana J. I.

CATALYSTS, cilt.11, sa.3, 2021 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 11 Sayı: 3
  • Basım Tarihi: 2021
  • Doi Numarası: 10.3390/catal11030386
  • Dergi Adı: CATALYSTS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, CAB Abstracts, Chemical Abstracts Core, Communication Abstracts, INSPEC, Metadex, Directory of Open Access Journals, Civil Engineering Abstracts
  • Anahtar Kelimeler: acridone, carbamazepine, colour, oxo-carbamazepine, photo-Fenton
  • Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
  • Anadolu Üniversitesi Adresli: Evet

Özet

The oxidation of aqueous solutions of carbamazepine is conducted using the Fenton reagent, combined with the photolytic action of a 150 W medium pressure UV lamp, operating at T = 40 degrees C. The effect of acidity is analysed at an interval pH = 2.0-5.0, verifying that operating at pH = 5.0 promotes colour formation (Colour = 0.15 AU). The effect of iron is studied, finding that the colour of the water increases in a linear way, Colour = 0.05 + 0.0075 [Fe](0). The oxidising action of hydrogen peroxide is tested, confirming that when operating with [H2O2](0) = 2.0 mM, the maximum colour is generated (Colour(max) = 0.381 AU). The tint would be generated by the degradation of by-products of carbamazepine, which have chromophoric groups in their internal structure, such as oxo and dioxocarbazepines, which would produce tint along the first minutes of oxidation, while the formation of acridones would slowly induce colour in the water.