Mohseni, Mojtaba ; Felder, Daniel ; Percin, Korcan ; Thönes, Maximilian ; Gassenmeier, Matthias ; Kupec, Robin ; Weidlich, Claudia ; Linkhorst, John ; Keller, Robert G. ; Wessling, Matthias (2023)
Toward Decentralized Wastewater Treatment: A Flow-through Module Using Microtubular Gas Diffusion Electrodes for Micropollutants Removal.
In: Journal of Hazardous Materials, 458
doi: 10.1016/j.jhazmat.2023.131987
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Electro-Fenton (EF) represents an eco-friendly and cost-effective advanced oxidation process that can remove highly persistent and hazardous pharmaceuticals, e.g., contrast media agents, from water bodies. However, up to date, EF modules incorporate a planar carbonaceous gas diffusion electrode (GDE) cathode containing fluorinated compounds as polymeric binders. Here, we introduce a novel flow-through module that deploys freestanding carbon microtubes (CMT) as microtubular GDEs, omitting any risks of secondary pollution by highly-persistent fluorinated compounds (e.g., Nafion). The flow-through module was characterized for electrochemical hydrogen peroxide (H2O2) generation and micropollutant removal via EF. H2O2 electro-generation experiments illustrated high production rates (1.1~±~0.1– 2.7~±~0.1~mg~cm-2 h-1) at an applied cathodic potential of -~0.6~V vs. SHE, depending on the porosity of CMTs. Diatrizoate (DTZ), as the model pollutant, with a high initial concentration of 100~mg~L-1 was successfully oxidized (95– 100 %), reaching mineralization (TOC— total organic carbon removal) efficiencies up to 69 %. Additionally, Electro-adsorption experiments demonstrated the capability of positively charged CMTs to remove negatively charged DTZ with a capacity of 11~mg~g-1 from a 10~mg~L-1 DTZ solution. These results reveal the potential of the as-designed module to serve as an oxidation unit coupled with other separation techniques, e.g., electro-adsorption or membrane processes.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Mohseni, Mojtaba ; Felder, Daniel ; Percin, Korcan ; Thönes, Maximilian ; Gassenmeier, Matthias ; Kupec, Robin ; Weidlich, Claudia ; Linkhorst, John ; Keller, Robert G. ; Wessling, Matthias |
| Art des Eintrags: | Bibliographie |
| Titel: | Toward Decentralized Wastewater Treatment: A Flow-through Module Using Microtubular Gas Diffusion Electrodes for Micropollutants Removal |
| Sprache: | Englisch |
| Publikationsjahr: | 2023 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Hazardous Materials |
| Jahrgang/Volume einer Zeitschrift: | 458 |
| DOI: | 10.1016/j.jhazmat.2023.131987 |
| Kurzbeschreibung (Abstract): | Electro-Fenton (EF) represents an eco-friendly and cost-effective advanced oxidation process that can remove highly persistent and hazardous pharmaceuticals, e.g., contrast media agents, from water bodies. However, up to date, EF modules incorporate a planar carbonaceous gas diffusion electrode (GDE) cathode containing fluorinated compounds as polymeric binders. Here, we introduce a novel flow-through module that deploys freestanding carbon microtubes (CMT) as microtubular GDEs, omitting any risks of secondary pollution by highly-persistent fluorinated compounds (e.g., Nafion). The flow-through module was characterized for electrochemical hydrogen peroxide (H2O2) generation and micropollutant removal via EF. H2O2 electro-generation experiments illustrated high production rates (1.1~±~0.1– 2.7~±~0.1~mg~cm-2 h-1) at an applied cathodic potential of -~0.6~V vs. SHE, depending on the porosity of CMTs. Diatrizoate (DTZ), as the model pollutant, with a high initial concentration of 100~mg~L-1 was successfully oxidized (95– 100 %), reaching mineralization (TOC— total organic carbon removal) efficiencies up to 69 %. Additionally, Electro-adsorption experiments demonstrated the capability of positively charged CMTs to remove negatively charged DTZ with a capacity of 11~mg~g-1 from a 10~mg~L-1 DTZ solution. These results reveal the potential of the as-designed module to serve as an oxidation unit coupled with other separation techniques, e.g., electro-adsorption or membrane processes. |
| Freie Schlagworte: | Decentralized Water and Wastewater Treatment, Electro-Adsorption and Electro-Fenton, Micro- and Mesoporous Carbons, Micropollutants Removal, PFAS-free and Microtubular Electrodes |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Fachgebiet Verfahrenstechnik elektrochemischer Systeme (VES) |
| Hinterlegungsdatum: | 13 Sep 2023 11:13 |
| Letzte Änderung: | 13 Sep 2023 11:13 |
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