Ιδρυματικό Αποθετήριο
Πολυτεχνείο Κρήτης
Πολυτεχνείο Κρήτης
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| URI | http://purl.tuc.gr/dl/dias/27CBD46B-FE35-4994-9CAD-42C25A83D1F8 | - |
| Αναγνωριστικό | https://doi.org/10.3390/min10100844 | - |
| Αναγνωριστικό | https://www.mdpi.com/2075-163X/10/10/844 | - |
| Γλώσσα | en | - |
| Μέγεθος | 18 pages | en |
| Μέγεθος | 4,35 megabytes | en |
| Τίτλος | Synthesis of zeolites from Greek fly ash and assessment of their copper removal capacity | en |
| Δημιουργός | Vavouraki Aikaterini | en |
| Δημιουργός | Βαβουρακη Αικατερινη | el |
| Δημιουργός | Bartzas Georgios | en |
| Δημιουργός | Komnitsas Konstantinos | en |
| Δημιουργός | Κομνιτσας Κωνσταντινος | el |
| Εκδότης | MDPI | en |
| Περίληψη | The objective of this study was to synthesize zeolites through fusion of lignite fly ash and NaOH or KOH pellets at 600 °C and assess their removal efficiency in terms of decontamination of solutions containing Cu(II) ions. The removal efficiency of the produced zeolites was tested in batch kinetic experiments using different zeolites and Cu(II) ion concentrations. Experimental data revealed that zeolites synthesized with the use of NaOH exhibited higher removal efficiency compared with those synthesized with the use of KOH. Kinetic data showed that the pseudo-second-order equations described well the removal process. Copper removal was mainly accomplished through the concerted action of chemisorption and intraparticle diffusion. Analytical techniques involving XRF, XRD, FTIR, SEM/EDS and XPS were used for the characterization and morphology analysis of the produced zeolites. SEM/EDS confirmed the presence of copper on the zeolite surface. XPS spectra of Cu2p at 934.3 eV proved the presence of Cu(II) oxidation state, confirming the possible formation of CuO and/or Cu-Cl. | en |
| Τύπος | Peer-Reviewed Journal Publication | en |
| Τύπος | Δημοσίευση σε Περιοδικό με Κριτές | el |
| Άδεια Χρήσης | http://creativecommons.org/licenses/by/4.0/ | en |
| Ημερομηνία | 2021-05-11 | - |
| Ημερομηνία Δημοσίευσης | 2020 | - |
| Θεματική Κατηγορία | Fly ash | en |
| Θεματική Κατηγορία | Synthetic zeolites | en |
| Θεματική Κατηγορία | Copper removal | en |
| Θεματική Κατηγορία | Kinetics | en |
| Θεματική Κατηγορία | X-ray photoelectron spectroscopy (XPS) | en |
| Βιβλιογραφική Αναφορά | A. Vavouraki, G. Bartzas, and K. Komnitsas, “Synthesis of zeolites from Greek fly ash and assessment of their copper removal capacity,” Minerals, vol. 10, no. 10, Oct. 2020. doi: 10.3390/min10100844 | en |
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