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Enhanced adsorption and visible light photocatalytic removal of 5-Fluoro-uracil residuals using environmental NiO/geopolymer nanocomposite: Steric, energetic, and oxidation studies
DC Field | Value | Language |
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dc.contributor.author | Abukhadra, Mostafa R. | - |
dc.contributor.author | AlHammadi, Ali A. | - |
dc.contributor.author | Khim, Jong Seong | - |
dc.contributor.author | Ajarem, Jamaan S. | - |
dc.contributor.author | Allam, Ahmed A. | - |
dc.contributor.author | Shaban, Mohamed S. | - |
dc.date.accessioned | 2022-10-24T00:15:21Z | - |
dc.date.available | 2022-10-24T00:15:21Z | - |
dc.date.created | 2022-10-18 | - |
dc.date.issued | 2022-12 | - |
dc.identifier.citation | Journal of Environmental Chemical Engineering, Vol.10 No.6, p. 108569 | - |
dc.identifier.issn | 2213-3437 | - |
dc.identifier.uri | https://hdl.handle.net/10371/186592 | - |
dc.description.abstract | Synthetic kaolinite-based geopolymer structure was impeded with NiO nanoparticles (NiO/GP) for promising decontamination of 5-Fluorouracil drug residuals (5-Fu) either by adsorption or oxidation. The adsorption of 5 -Fu by NiO/GP follows the kinetic assumption of the Pseudo-First order model (R2 > 0.99). The equilibrium behaviors of 5-Fu uptake reactions were illustrated by the classic Langmuir and advanced Monolayer model of one energy site (R2 > 0.99). The steric parameters including both the active sites density (Nm) and 5-Fu satu-ration capacity (Qsat) increase regularly with the test temperature up to 40 oC (Nm = 323 mg/g and Qsat =329.7 mg/g) reflecting the exothermic properties of the reaction. The number of the captured 5-Fu molecules per site (n > 1) suggested vertical uptake of 1???2 molecules by a multimolecular mechanism. The estimated values of adsorption energy (14.6-16.55 kJ/mol) and Gaussian energy (1.3???3.18 kJ/mol) reflect the physisorption of 5-Fu by NiO/GP. The energetic parameters of internal energy, free enthalpy, and entropy demonstrate sponta-neous, feasible, and endothermic uptake reactions. As photocatalyst, the NiO/GP (0.1 g/L) caused complete oxidation for 5-Fu residuals (50 mg/L) after 20 min while the complete mineralization was achieved after 100 min under a visible light source. Based on the detected intermediate compounds, the 5-Fu oxidation pathway over NiO/GP occurred by hydroxylation and fluorine release processes considering the hydroxyl radicals as the main oxidizing species. Superscript/Subscript Available | - |
dc.language | 영어 | - |
dc.publisher | Elsevier BV | - |
dc.title | Enhanced adsorption and visible light photocatalytic removal of 5-Fluoro-uracil residuals using environmental NiO/geopolymer nanocomposite: Steric, energetic, and oxidation studies | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.jece.2022.108569 | - |
dc.citation.journaltitle | Journal of Environmental Chemical Engineering | - |
dc.identifier.wosid | 000859750100004 | - |
dc.identifier.scopusid | 2-s2.0-85139233610 | - |
dc.citation.number | 6 | - |
dc.citation.startpage | 108569 | - |
dc.citation.volume | 10 | - |
dc.description.isOpenAccess | N | - |
dc.contributor.affiliatedAuthor | Khim, Jong Seong | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
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