Ιδρυματικό Αποθετήριο
Πολυτεχνείο Κρήτης
Πολυτεχνείο Κρήτης
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| URI | http://purl.tuc.gr/dl/dias/5CBE642D-4E5F-4049-BCDC-C31DFBAE4601 | - |
| Αναγνωριστικό | https://doi.org/10.3390/min12111466 | - |
| Αναγνωριστικό | https://www.mdpi.com/2075-163X/12/11/1466 | - |
| Γλώσσα | en | - |
| Μέγεθος | 17 pages | en |
| Τίτλος | Valorization potential of Polish laterite leaching residues through alkali activation | en |
| Δημιουργός | Karmali Vasiliki | en |
| Δημιουργός | Καρμαλη Βασιλικη | el |
| Δημιουργός | Petrakis Evaggelos | en |
| Δημιουργός | Πετρακης Ευαγγελος | el |
| Δημιουργός | Bartzas Georgios | en |
| Δημιουργός | Komnitsas Konstantinos | en |
| Δημιουργός | Κομνιτσας Κωνσταντινος | el |
| Εκδότης | MDPI | en |
| Περίληψη | In this study, the valorization potential of Polish laterite leaching residues through alkali activation with the use of NaOH and Na2SiO3 solutions as activators was investigated. The effect of the main factors, namely the H2O/Na2O molar ratio in the activating solution, the curing temperature, and the ageing period on the main properties of the produced alkali activated materials (AAMs) was assessed. The experimental results showed that AAMs with sufficient compressive strength were only produced when the laterite leaching residues were mixed with significant quantities of metakaolin; thus, when the mass ratio of laterite leaching residues and metakaolin was 0.50, after curing at 40 °C for 24 h and ageing for 7 days, the produced AAMs acquired compressive strength that slightly exceeded 25 MPa. X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy, and energy dispersive X-ray spectroscopy (SEM–EDS) analysis were used for the characterization of the raw materials and selected AAMs. Furthermore, the structural integrity of the specimens was investigated after immersion in distilled water and acidic solution (1 mol L−1 HCl), or after firing at higher temperatures. Finally, the toxicity of the produced AAMs was assessed with the use of standard leaching tests. | 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 | 2023-08-29 | - |
| Ημερομηνία Δημοσίευσης | 2022 | - |
| Θεματική Κατηγορία | Laterite leaching residues | en |
| Θεματική Κατηγορία | Metakaolin | en |
| Θεματική Κατηγορία | Alkali activating materials | en |
| Θεματική Κατηγορία | Compressive strength | en |
| Βιβλιογραφική Αναφορά | V. Karmali, E. Petrakis, G. Bartzas, and K. Komnitsas, “Valorization potential of Polish laterite leaching residues through alkali activation,” Minerals, vol. 12, no. 11, Nov. 2022, doi: 10.3390/min12111466. | en |
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