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dc.contributor.authorLozano Lunar, Angélica
dc.contributor.authorFernández Ledesma, Enrique
dc.contributor.authorRomero Esquinas, Álvaro
dc.contributor.authorJiménez Romero, José Ramón
dc.contributor.authorFernández Rodríguez, José María
dc.date.accessioned2019-05-24T06:12:14Z
dc.date.available2019-05-24T06:12:14Z
dc.date.issued2019
dc.identifier.urihttp://hdl.handle.net/10396/18626
dc.description.abstractA new line of mortars incorporating hydrotalcites was developed. This research article shows the results of a study of a double barrier technique (DBT) for Pb immobilisation from electric arc furnace dust (EAFD) in mortars with the addition of three different hydrotalcites (H1, H2, and H3). Electric arc furnace dust (EAFD) is a hazardous waste due to its heavy metal leachability. The aim was to obtain a mortar in which, due to its chemical composition, heavy metal leaching satisfied environmental criteria. Previously, a physical and chemical characterisation of mortar material components was carried out. The leaching behaviour of Pb from EAFD in double barrier (DB) mortars with different hydrotalcites was analysed for compressive strength to determine treatment effectiveness. DB mortars could be considered monoliths because their compressive strengths were higher than 1 MPa but exhibited a decrease due to hydrotalcite incorporation. The mortar EAFD25_H2 (with ethylenediaminetetraacetate (EDTA) in the interlayer of the hydrotalcite) showed one minor reduction in compressive strength with respect to the reference mortar because formation of Portlandite was observed, which is a characteristic of cement hydration. The conventional immobilisation mortar (EAFD25) did not achieve Pb immobilisation. However, DB mortars with dimercaptosuccinate (DMSA) in the interlayer of the hydrotalcite reduced Pb release by ~50%, from 20.29 mg kg−1 (EAFD25) to 9.88 mg kg−1 (EAFD25_H3). In addition, EAFD25_H3 included the lowest hydrotalcite content, thereby improving the immobilisation ratio. The results of this study contribute to better Pb immobilisation, thus satisfying environmental criteria.es_ES
dc.format.mimetypeapplication/pdfes_ES
dc.language.isoenges_ES
dc.publisherMDPIes_ES
dc.rightshttps://creativecommons.org/licenses/by-nc-nd/4.0/es_ES
dc.sourceMaterials 12(4), 633 (2019)es_ES
dc.subjectElectric arc furnace dustes_ES
dc.subjectHydrotalcitees_ES
dc.subjectDouble barrier techniquees_ES
dc.subjectLeaching behavioures_ES
dc.subjectPb immobilisationes_ES
dc.titleA Double Barrier Technique with Hydrotalcites for Pb Immobilisation from Electric Arc Furnace Dustes_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.relation.publisherversionhttp://dx.doi.org/10.3390/ma12040633es_ES
dc.relation.projectIDJunta de Andalucía. FQM-391es_ES
dc.relation.projectIDJunta de Andalucía. TEP-227es_ES
dc.relation.projectIDGobierno de España. MECD-FPU14/05245es_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses_ES


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