Coupling cathodic electro-fenton with anodic photo-electrochemical oxidation: A feasibility study on the mineralization of paracetamol. Issue 5 (October 2020)

• Record Type: Journal Article
• Authors: Orimolade, Benjamin O.; Zwane, Busisiwe N.; Koiki, Babatunde A.; Rivallin, Matthieu; Bechelany, Mikhael; Mabuba, Nonhlangabezo; Lesage, Geoffroy; Cretin, Marc; Arotiba, Omotayo A.
• Is Part Of: Journal of environmental chemical engineering. Volume 8:Issue 5(2020)
• Publication Date: 2020-10
• Subjects: Wastewater treatment -- Electro-Fenton -- Photoelectrochemical oxidation -- Paracetamol -- Photoanode; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2020.104394
• Languages: English
• ISSNs: 2213-2929

Abstract

Graphical abstract: PEC: photoelectrochemical Oxidation; T-CF: thermally treated carbon felt. Highlights: Electro-Fenton was coupled with photoelectrochemical degradation – E.F/PEC. EF mineralisation of paracetamol yielded 71 % TOC removal after 4 h at 20 mA cm −1 . EF/PEC mineralisation of paracetamol was 92 % TOC removal in 4 h at 10 mA cm −1 . EF/PEC has 64 % lower energy consumption for mineralisation than EF. The treated water showed low toxicity towards aquatic bacteria - Vibrio fisheri . 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.