Application of iron-intercalated graphite for modification of nickel foam cathode in heterogeneous electro-Fenton system: Bisphenol A removal from water at neutral pH.

Autor: Nadali Pishnamaz HM; Department of Environmental Engineering, Graduate Faculty of Environment, University of Tehran, Tehran, Iran. Electronic address: hossein.nadali1@ut.ac.ir., Ranjbar E; School of Civil Engineering, College of Engineering, University of Tehran, Tehran, Iran; German Environment Agency (UBA), Section II 3.3, Schichauweg 58, 12307 Berlin, Germany; Chair of Water Treatment, Technische Universität Berlin, KF4, Str. des 17. Juni 135, 10623 Berlin, Germany. Electronic address: eranjbar@ut.ac.ir., Baghdadi M; Department of Environmental Engineering, Graduate Faculty of Environment, University of Tehran, Tehran, Iran. Electronic address: m.baghdadi@ut.ac.ir.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2023 Oct; Vol. 339, pp. 139787. Date of Electronic Publication: 2023 Aug 09.
DOI: 10.1016/j.chemosphere.2023.139787
Abstrakt: The presence of bisphenol A (BPA) in natural waters can be highly harmful due to its high persistence and adverse effects, raising concerns to remove this hazardous compound. Herein, an electro-Fenton system is proposed to eliminate BPA, wherein the iron source in the Fenton reaction is provided by its intercalation into the carbon layers of graphite. The produced heterogeneous catalyst was then coated onto the nickel foam serving as a cathode. The magnetic graphite intercalated compound (mGIC) and the modified cathode (before and after experiments) were characterized by FE-SEM, EDX, XPS, and XRD analyses. Some effective parameters, namely pH (3-9), current density (0-20 mA cm -2 ), and BPA concentration (0.5-20 mg L -1 ) were studied. At pH 3, the removal of BPA was 95.52%, and under neutral circumstances, the BPA and TOC removals were 85.70 and 58.12%, respectively at the initial BPA concentration of 10 mg L -1 . The proposed system was also applied to several water sources spiked with BPA at the concentration of 5 mg L -1 under neutral pH, which exhibited considerable removal of 99.74%, 99.72%, and 92.70% for groundwater, municipal effluent wastewater, and tap water, respectively. The proposed system was applied for 15 consecutive cycles without showing significant changes in BPA removal, indicating its excellent stability and reusability. Furthermore, based on the analysis of intermediates, a possible decomposition pathway was proposed, indicating a reduction in overall toxicity. By using the proposed heterogeneous electro-Fenton system, iron waste is avoided, and operational costs of treatment can be reduced due to the absence of iron sludge production and catalyst loss.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023. Published by Elsevier Ltd.)
Databáze: MEDLINE
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