Coupling cathodic electro-fenton with anodic photo-electrochemical oxidation: A feasibility study on the mineralization of paracetamol

Benjamin O. Orimolade, Busisiwe N. Zwane, Babatunde A. Koiki, Matthieu Rivallin, Mikhael Bechelany, Nonhlangabezo Mabuba, Geoffroy Lesage, Marc Cretin, Omotayo A. Arotiba

Research output: Contribution to journalArticlepeer-review

71 Citations (Scopus)

Abstract

A cathodic electro-Fenton (EF) process consisting of thermally treated carbon felt and anodic photoelectrochemical (PEC) oxidation process consisting of bismuth vanadate-bismuth oxyiodide electrodeposited on fluorine doped tin oxide glass (FTO-BiVO4/BiOI) were coupled into a single electrochemical advanced oxidation system for the mineralisation of paracetamol. EF degradation of paracetamol yielded 71 % total organic carbon (TOC) removal after 4 h with a current density of 20 mA cm-2. With the coupled EF/PEC system, the complete removal of paracetamol was achieved within 2 h and a higher mineralisation of 92 % TOC removal after 4 h was recorded with a 10 mA cm-2 current density. The specific energy consumption of the EF/PEC process was about 64 % lower than the energy consumption of EF process alone. The treated aqueous solution exhibited reduced toxicity in comparison with the untreated solution with about 1% inhibition of Vibrio fisheri. This EF/PEC system showed a synergic improvement in performance over EF and PEC.

Original languageEnglish
Article number104394
JournalJournal of Environmental Chemical Engineering
Volume8
Issue number5
DOIs
Publication statusPublished - Oct 2020

Keywords

  • Electro-Fenton
  • Paracetamol
  • Photoanode
  • Photoelectrochemical oxidation
  • Wastewater treatment

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Waste Management and Disposal
  • Pollution
  • Process Chemistry and Technology

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