Prediction of carbofuran degradation based on the hydroxyl radical's generation using the FeIII impregnated N doped-TiO2/H2O2/visible LED photo-Fenton-like process

Amal Abdelhaleem, Wei Chu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

15 Citations (Scopus)


Hydroxyl radicals ([rad]OH) are the dominant reactive species during most photocatalytic reactions. Therefore, [rad]OH generation as an index could be beneficial in comparing the obtained results in different experimental setup designs, thereby providing new insights for understanding the photocatalytic mechanism. Heterogeneous photo-Fenton like processes are one of the most effective technologies for degradation of organic pollutants through [rad]OH production. Nevertheless, kinetic models that take into account the dependence of the contaminant degradation on [rad]OH generation under homogeneous oxidant supply, are still limited in such processes. In this paper, a photo-Fenton like reagent (FeIII impregnated N-doped TiO2 (FeNT)/H2O2) involving both heterogeneous and homogeneous phases was employed for carbofuran (CBF) degradation, frequently used pesticide in many developing countries from the carbamate group. In addition, a commercial visible LED lamp (Vis LED) with high power output was utilized as an innovative and efficient visible light source to simulate solar energy. Accordingly, a new kinetic model was proposed to predict CBF degradation in the FeNT/H2O2/Vis LED process under high Vis LED light intensities based on intrinsic reaction parameters, including the Vis LED light intensity, FeNT dosage, initial H2O2 concentration, and [rad]OH generation. The developed model was verified and validated successfully under various reaction conditions. However, a standard error ranging from 3% to 15% was observed at extreme cases such as high [FeNT] and I or low [H2O2]0 when comparing model predictions and experimental results. This is due to the use of averaged conditions to forecast the rate constants.

Original languageEnglish
Article number122930
JournalChemical Engineering Journal
Publication statusPublished - 15 Feb 2020


  • Carbofuran
  • Fe-N doped TiO
  • Hydroxyl radicals
  • Impregnation
  • Kinetic modeling
  • Visible LED

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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