Ιδρυματικό Αποθετήριο
Πολυτεχνείο Κρήτης
Πολυτεχνείο Κρήτης
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| URI | http://purl.tuc.gr/dl/dias/07FD8F83-E352-4AD6-8F3A-D88901C97EB4 | - |
| Αναγνωριστικό | https://doi.org/10.1016/j.clay.2012.09.018 | - |
| Γλώσσα | en | - |
| Μέγεθος | 6 | en |
| Τίτλος | Effect of sulphate and nitrate anions on heavy metal immobilisation in ferronickel slag geopolymers | en |
| Δημιουργός | Komnitsas Konstantinos | en |
| Δημιουργός | Κομνιτσας Κωνσταντινος | el |
| Δημιουργός | Zaharaki Dimitra | en |
| Δημιουργός | Bartzas Georgios | en |
| Εκδότης | Elsevier | en |
| Περιγραφή | Δημοσίευση σε επιστημονικό περιοδικό | el |
| Περίληψη | Industrial wastes need to be valorised and new techniques need to be developed for the production of secondary materials or immobilisation of hazardous elements in order to improve sustainability of the respective industrial sector. In the present experimental study the effect of monovalent and divalent anions, such as sulphate and nitrate, on heavy metal immobilisation in ferronickel slag geopolymers was investigated. Low calcium electric arc ferronickel slag was geopolymerised using KOH and Na2SiO3 as activators, in the presence of limited quantities of sulphate and nitrate salts of Pb, Cu, Cr or Ni. Gel properties, final strength of the specimens produced and immobilisation of heavy metals were determined, in order to explore the potential of geopolymerisation in developing a hazardous waste encapsulation matrix. In addition, the Toxicity Characteristics Leaching Procedure was used to assess the potential toxicity of the produced geopolymers. The experimental results indicate that even limited quantities of sulphates and nitrates in the starting mixture affect adversely geopolymerisation of ferronickel slag. XRD (X-ray diffraction), SEM (scanning electron microscopy) and FTIR (Fourier transform infrared spectroscopy) studies were carried out to identify new phases, reactions taking place and thus elucidate the main mechanisms involved. | 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 | 2015-11-02 | - |
| Ημερομηνία Δημοσίευσης | 2013 | - |
| Θεματική Κατηγορία | Geopolymer | en |
| Θεματική Κατηγορία | Ferronickel slag | en |
| Θεματική Κατηγορία | Heavy metals | en |
| Θεματική Κατηγορία | Anions | en |
| Βιβλιογραφική Αναφορά | K. Komnitsas, D. Zaharaki, G. Bartzas, " Effect of sulphate and nitrate anions on heavy metal immobilisation in ferronickel slag geopolymers," Applied Clay Science, vol. 73, pp. 103–109, Mar. 2013. doi: 10.1016/j.clay.2012.09.018 | en |
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