Synthesis of pollucite and analcime zeolites by recovering aluminum from a saline slag
| dc.contributor.author | Jiménez, Alejandro | |
| dc.contributor.author | Misol, Alexander | |
| dc.contributor.author | Morato, Álvaro | |
| dc.contributor.author | Rives, Vicente | |
| dc.contributor.author | Vicente, Miguel Ángel | |
| dc.contributor.author | Gil Bravo, Antonio | |
| dc.contributor.department | Institute for Advanced Materials and Mathematics - INAMAT2 | en |
| dc.date.accessioned | 2022-01-19T08:43:51Z | |
| dc.date.available | 2022-01-19T08:43:51Z | |
| dc.date.issued | 2021 | |
| dc.description.abstract | This work describes a valorization procedure for one of the most important wastes generated during aluminum recycling, namely, saline slag. This procedure was divided in two steps: a) recovery of aluminum or its compounds in various fractions, and b) the use of one of those fractions in the synthesis of two zeolites: analcime (NaAlSi2O6 center dot H2O) and pollucite (CsAlSi2O6 center dot nH(2)O). Saline slag was ground, sieved (1 mm), washed and separated into two fractions of different sizes, one larger and another smaller than 0.4 mm. The fraction smaller than 0.4 mm was treated under reflux conditions with NaOH or CsOH solutions. The extraction liquor contained aluminum and alkali metal cations; after adding the necessary amount of Si, hydrothermal synthesis was carried out, obtaining the zeolitic materials. Characterization of the solids obtained was carried out by powder X-ray diffraction, thermal analysis, FT-IR spectroscopy, element chemical analysis and electron microscopy. The valorization procedure proposed in this work showed that a high percentage of Al (close to 45 wt%) can be recovered from the fraction smaller than 0.4 mm and that the liquors extracted with NaOH or CsOH can be used as a source for the hydrothermal synthesis (200 degrees C for 24 h) of two zeolites of the analcime family, obtaining in both cases pure and crystalline solids. | en |
| dc.description.sponsorship | This work was supported by MINECO and ERDF (MAT 201678863-C2-R). A. Jimenez thanks Junta de Castilla y León and Sistema Nacional de Garantia Juvenil for a formation contract and Universidad de Salamanca and Banco Santander for a predoctoral contract. A. Misol thanks Junta de Castilla y León and ERDF for a predoctoral contract. AG also thanks Santander Bank for funding through the Research Intensification Program. | en |
| dc.format.extent | 8 p. | |
| dc.format.mimetype | application/pdf | en |
| dc.identifier.doi | 10.1016/j.jclepro.2021.126667 | |
| dc.identifier.issn | 1879-1786 | |
| dc.identifier.uri | https://academica-e.unavarra.es/handle/2454/41822 | |
| dc.language.iso | eng | en |
| dc.publisher | Elsevier | |
| dc.relation.ispartof | Journal of Cleaner Production, 297, (2021) | |
| dc.relation.projectID | info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2016-78863-C2-R/ | |
| dc.relation.publisherversion | http://doi.org/10.1016/j.jclepro.2021.126667 | |
| dc.rights | © 2021 Elsevier Ltd. Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International | en |
| dc.rights.accessRights | info:eu-repo/semantics/openAccess | |
| dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | |
| dc.subject | Saline slag | en |
| dc.subject | Aluminum recovery | en |
| dc.subject | Zeolitic materials | en |
| dc.subject | Pollucite | en |
| dc.subject | Analcime | en |
| dc.title | Synthesis of pollucite and analcime zeolites by recovering aluminum from a saline slag | en |
| dc.type | info:eu-repo/semantics/article | |
| dc.type.version | info:eu-repo/semantics/publishedVersion | |
| dspace.entity.type | Publication | |
| relation.isAuthorOfPublication | cd12e590-cb42-47d5-a642-f60eeee624ec | |
| relation.isAuthorOfPublication.latestForDiscovery | cd12e590-cb42-47d5-a642-f60eeee624ec |