Comparative study of the degradation of carbamazepine in water by advanced oxidation processes

Chao Meng Dai, Xue Fei Zhou, Ya Lei Zhang, Yan Ping Duan, Zhi Min Qiang, Tian C. Zhang

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25 Scopus citations

Abstract

Degradation of carbamazepine (CBZ) using ultraviolet (UV), UV/H2O2, Fenton, UV/Fenton and photocatalytic oxidation with TiO2 (UV/TiO2) was studied in deionized water. The five different oxidation processes were compared for the removal kinetics of CBZ. The results showed that all the processes followed pseudo-first-order kinetics. The direct photolysis (UV alone) was found to be less effective than UV/H2O2 oxidation for the degradation of CBZ. An approximate 20% increase in the CBZ removal efficiency occurred with the UV/Fenton reaction as compared with the Fenton oxidation. In the UV/TiO2 system, the kinetics of CBZ degradation in the presence of different concentrations of TiO2 followed the pseudo-first order degradation, which was consistent with the Langmuir–Hinshelwood (L–H) model. On a time basis, the degradation efficiencies of CBZ were in the following order: UV/Fenton (86.9%±1.7%)>UV/TiO2 (70.4%±4.2%)>Fenton (67.8%±2.6%)>UV/H2O2 (40.65±5.1%)>UV (12.2%±1.4%). However, the lowest cost was obtained with the Fenton process.

Original languageEnglish (US)
Pages (from-to)1101-1109
Number of pages9
JournalEnvironmental Technology (United Kingdom)
Volume33
Issue number10
DOIs
StatePublished - May 2012

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Keywords

  • Advanced oxidation processes
  • Carbamazepine
  • Comparative assessment
  • Degradation
  • Water

ASJC Scopus subject areas

  • Environmental Chemistry
  • Water Science and Technology
  • Waste Management and Disposal

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