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Electrosorption-driven selective thorium removal from radioactive wastewater with phosphate ? Incorporated g-C3N4 electrode

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dc.citedby2
dc.contributor.authorYussuf N.M.en_US
dc.contributor.authorIsmail A.F.en_US
dc.contributor.authorRahmat M.A.en_US
dc.contributor.authorMohamed N.A.en_US
dc.contributor.authorid57201213508en_US
dc.contributor.authorid29067828200en_US
dc.contributor.authorid57310864200en_US
dc.contributor.authorid57201821340en_US
dc.date.accessioned2025-03-03T07:41:52Z
dc.date.available2025-03-03T07:41:52Z
dc.date.issued2024
dc.description.abstractThis research introduces a novel approach for developing an improved method for removing thorium ions (Th(IV)), termed as electrosorption, by fusing the principles of electricity and adsorption. The methodology involves utilizing a phosphate ? incorporated graphitic carbon nitride (g-C3N4/P) electrode, synthesized via a hydrothermal ? calcination process with urea as a precursor and bis (2-ethylhexyl) phosphoric acid (D2EHPA) as a dopant. Static batch experiments were conducted to explore the influence of various parameters, including voltages, initial Th(IV) concentrations and operational time, on the electrosorption of Th(IV). Characterization analysis including XRD, FT-IR, FESEM-EDS and XPS were conducted to validate the successful integration of phosphate into the g-C3N4 structure. The g-C3N4/P electrode demonstrated impressive adsorption capacity for Th(IV) electrosorption in an aqueous solution containing an initial concentration of Th(IV) at 100 mg.L?1. It was observed that applying a potential as low as ?0.2 V resulted in significantly increase in the Th(IV) removal with 92.23 % (> 300 mg.g?1) within 30 minutes of duration, compared to cases without the electrochemical assistance (65.41 mg.g?1). Through FT-IR and XPS analyses, the adsorption mechanism was clarified as follows: (1) the negatively charged g-C3N4/P electrode attracted Th(IV) ions through electrostatic interaction; and (2) Th(IV) ions was coordinated with exposed oxygen (O), nitrogen (N) and phosphorus (P) atoms via complexation. In the context of real wastewater scenarios involving rare earth residue, encompassing Ce(III), La(III), Nd(III) and Pr(III) ions, the g-C3N4/P electrode showcased good capabilities in selectively adsorbing Th(IV). Additionally, the electrode synthesized in this study displayed considerable regenerative capabilities, sustaining a commendable removal ratio of approximately 70 % over five successive cycles. These findings underscore the promising potential of g-C3N4/P electrode for thorium removal through electrosorption applications. ? 2024 Elsevier Ltden_US
dc.description.natureFinalen_US
dc.identifier.ArtNo113440
dc.identifier.doi10.1016/j.jece.2024.113440
dc.identifier.issue5
dc.identifier.scopus2-s2.0-85197477624
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85197477624&doi=10.1016%2fj.jece.2024.113440&partnerID=40&md5=b526d6004232fc68ce216a8ae737a601
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/36307
dc.identifier.volume12
dc.publisherElsevier Ltden_US
dc.sourceScopus
dc.sourcetitleJournal of Environmental Chemical Engineering
dc.subjectAdsorption
dc.subjectCarbon nitride
dc.subjectCerium compounds
dc.subjectHydrothermal synthesis
dc.subjectIons
dc.subjectLanthanum compounds
dc.subjectNeodymium compounds
dc.subjectPraseodymium compounds
dc.subjectRare earths
dc.subjectUrea
dc.subjectX ray photoelectron spectroscopy
dc.subjectBatch experiments
dc.subjectCalcinations process
dc.subjectElectrosorption
dc.subjectG-C3N4
dc.subjectGraphitic carbon nitrides
dc.subjectHydrothermal-calcination
dc.subjectPhosphate, hydrothermal synthesis
dc.subjectRadioactive wastewater
dc.subjectSynthesised
dc.subjectTh(IV)
dc.subjectElectrodes
dc.titleElectrosorption-driven selective thorium removal from radioactive wastewater with phosphate ? Incorporated g-C3N4 electrodeen_US
dc.typeArticleen_US
dspace.entity.typePublication
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