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dc.contributor.authorGalindo, R.-
dc.contributor.authorPadilla, Isabel-
dc.contributor.authorSánchez-Hernández, R.-
dc.contributor.authorRobla, J. I.-
dc.contributor.authorMonrós, G.-
dc.contributor.authorLópez-Delgado, Aurora-
dc.identifierdoi: 10.1016/j.jece.2015.09.012-
dc.identifierissn: 2213-3437-
dc.identifier.citationJournal of Environmental Chemical Engineering 3: 2552-2559 (2015)-
dc.description.abstract© 2015 Elsevier Ltd. All rights reserved. The powdered solids trapped in filter sleeves in the aluminium tertiary industry are currently disposed of in secure landfills as a result of environmental considerations. Their classification as a hazardous waste is due to their high aluminium content as metallic aluminium or in compounds such as aluminium nitride. These compounds can react with a very low moisture content to release toxic or hazardous gases such as hydrogen and ammonia. This paper presents a low-cost process for the full recovery of this hazardous waste in three steps leading to the production of two different added-value materials. In the first step, mild acid hydrolysis of the waste is carried out to obtain a concentrated aluminium solution and an inert cake. The following steps consist of hydrotalcite synthesis with the resulting solution, and the production of transparent glasses in the CaO-Al2O3-SiO2 system with the cake. Characterisation of the products obtained indicates that the hydrotalcites can adsorb anionic pollutants (molybdates) in a simple way, while the glasses afford improved optical properties in comparison with those prepared by direct vitrification of the waste.-
dc.description.sponsorshipThe authors thank Metalquex SL (Zaragoza, Spain) for supplying the wastes and CSIC for its financial support (P.I.E 201260E115). We also gratefully acknowledge the assistance provided by Dr. Blanca Casal for helpful discussion during this research. R. Sánchez-Hernández thanks MINECO for grant BES-2013-066269.-
dc.relation.isversionofPublisher's version-
dc.titleProduction of added-value materials from a hazardous waste in the aluminium tertiary industry: Synergistic effect between hydrotalcites and glasses-
dc.description.versionPeer Reviewed-
dc.contributor.funderMinisterio de Economía y Competitividad (España)-
dc.contributor.funderConsejo Superior de Investigaciones Científicas (España)-
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