Hydrotalcite-like compounds: a way to recover a hazardous waste in the aluminium tertiary industry

Magnesium–aluminium hydrotalcite-like compounds at ratios of 2:1, 3:1 and 4:1 were prepared using a non-conventional aluminium source, the hazardous wastes from the aluminium tertiary industry. The method consisted in a conventional coprecipitation at constant pH 10 with magnesium chloride hexahydra...

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Autores: Galindo, R., López-Delgado, Aurora, Padilla, Isabel, Yates, H. M.
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2014
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/103037
Acesso em linha:http://hdl.handle.net/10261/103037
Access Level:acceso abierto
Palavra-chave:Hydrotalcite
Layered double hydroxide (LDH)
Non-conventional aluminium source
Hazardous waste
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spelling Hydrotalcite-like compounds: a way to recover a hazardous waste in the aluminium tertiary industryGalindo, R.López-Delgado, AuroraPadilla, IsabelYates, H. M.HydrotalciteLayered double hydroxide (LDH)Non-conventional aluminium sourceHazardous wasteMagnesium–aluminium hydrotalcite-like compounds at ratios of 2:1, 3:1 and 4:1 were prepared using a non-conventional aluminium source, the hazardous wastes from the aluminium tertiary industry. The method consisted in a conventional coprecipitation at constant pH 10 with magnesium chloride hexahydrate and stable solutions of Al3 + from dispersions of the fine powder from the sleeve filter suction system in the aluminium slag milling process. The characterisation of the resulting materials indicated that hydrotalcites were strongly dependent on the presence of iron in the layers, as well as the carbonate and chloride content in the interlayer which affected the final properties. XRD and SAED indicated low crystallinity for these materials. Furthermore, as can be seen by SEM, the formation of disordered tiny nuclei was significant causing small spherical agglomerates. The infrared spectra showed a change of symmetry in the interlayer for the different ratios and the textural data suggested the “ink-bottle shaped” mesopores and type IIb isotherms, similar to the results obtained for pillared clays, and the transition to H2 type in the hysteresis loops as a function of the higher ratio.Authors thank the company Metalquex, S.L. (Zaragoza, Spain) for supplying wastes, and the CSIC for the financial support (P.I.E. 201260E115). We also gratefully acknowledge the assistance provided by Dr. Blanca Casal and Dr. Juan Carlos Galván.Peer reviewedElsevierConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201420142014info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/103037reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.clay.2014.03.022Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1030372026-05-22T06:33:51Z
dc.title.none.fl_str_mv Hydrotalcite-like compounds: a way to recover a hazardous waste in the aluminium tertiary industry
title Hydrotalcite-like compounds: a way to recover a hazardous waste in the aluminium tertiary industry
spellingShingle Hydrotalcite-like compounds: a way to recover a hazardous waste in the aluminium tertiary industry
Galindo, R.
Hydrotalcite
Layered double hydroxide (LDH)
Non-conventional aluminium source
Hazardous waste
title_short Hydrotalcite-like compounds: a way to recover a hazardous waste in the aluminium tertiary industry
title_full Hydrotalcite-like compounds: a way to recover a hazardous waste in the aluminium tertiary industry
title_fullStr Hydrotalcite-like compounds: a way to recover a hazardous waste in the aluminium tertiary industry
title_full_unstemmed Hydrotalcite-like compounds: a way to recover a hazardous waste in the aluminium tertiary industry
title_sort Hydrotalcite-like compounds: a way to recover a hazardous waste in the aluminium tertiary industry
dc.creator.none.fl_str_mv Galindo, R.
López-Delgado, Aurora
Padilla, Isabel
Yates, H. M.
author Galindo, R.
author_facet Galindo, R.
López-Delgado, Aurora
Padilla, Isabel
Yates, H. M.
author_role author
author2 López-Delgado, Aurora
Padilla, Isabel
Yates, H. M.
author2_role author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Hydrotalcite
Layered double hydroxide (LDH)
Non-conventional aluminium source
Hazardous waste
topic Hydrotalcite
Layered double hydroxide (LDH)
Non-conventional aluminium source
Hazardous waste
description Magnesium–aluminium hydrotalcite-like compounds at ratios of 2:1, 3:1 and 4:1 were prepared using a non-conventional aluminium source, the hazardous wastes from the aluminium tertiary industry. The method consisted in a conventional coprecipitation at constant pH 10 with magnesium chloride hexahydrate and stable solutions of Al3 + from dispersions of the fine powder from the sleeve filter suction system in the aluminium slag milling process. The characterisation of the resulting materials indicated that hydrotalcites were strongly dependent on the presence of iron in the layers, as well as the carbonate and chloride content in the interlayer which affected the final properties. XRD and SAED indicated low crystallinity for these materials. Furthermore, as can be seen by SEM, the formation of disordered tiny nuclei was significant causing small spherical agglomerates. The infrared spectra showed a change of symmetry in the interlayer for the different ratios and the textural data suggested the “ink-bottle shaped” mesopores and type IIb isotherms, similar to the results obtained for pillared clays, and the transition to H2 type in the hysteresis loops as a function of the higher ratio.
publishDate 2014
dc.date.none.fl_str_mv 2014
2014
2014
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/103037
url http://hdl.handle.net/10261/103037
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.clay.2014.03.022
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.811543

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