One-step synthesis of NaP1, SOD and ANA from a hazardous aluminum solid waste

NaP1, SOD, and ANA zeolites were synthesized from a hazardous aluminum waste as main aluminosilicate source by a one-step hydrothermal synthesis. This allowed the total transformation of the waste and no other solid residues were produced. The conversion of the waste into zeolites led to yields of ∼...

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Autores: Sánchez-Hernández, R., López-Delgado, Aurora, Padilla, Isabel, Galindo, R., López-Andrés, Sol
Tipo de recurso: artículo
Estado:Versión enviada para evaluación y publicación
Fecha de publicación:2016
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:dnet:digitalcsic_::29652661c2295c0e8b61bc3a6b90454b
Acceso en línea:http://hdl.handle.net/10261/129517
Access Level:acceso abierto
Palabra clave:NaP1
Sodalite and analcime
Hazardous waste
One-step hydrothermal synthesis
High-CEC zeolite
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spelling One-step synthesis of NaP1, SOD and ANA from a hazardous aluminum solid wasteSánchez-Hernández, R.López-Delgado, AuroraPadilla, IsabelGalindo, R.López-Andrés, SolNaP1Sodalite and analcimeHazardous wasteOne-step hydrothermal synthesisHigh-CEC zeoliteNaP1, SOD, and ANA zeolites were synthesized from a hazardous aluminum waste as main aluminosilicate source by a one-step hydrothermal synthesis. This allowed the total transformation of the waste and no other solid residues were produced. The conversion of the waste into zeolites led to yields of ∼2.5 kg of zeolite per kg of waste. Experimental parameters such as stirring, time, temperature, and concentration of alkalizing agent (NaOH solution) were studied to determine the best synthesis conditions. Samples were characterized by different techniques such as XRD, SEM-EDS, FTIR, TG-DTA; textural properties such as BET specific surface area, zeta potential, granulometry and cation-exchange capacity (CEC) were also determined. Temperature and alkali concentration were the parameters with strongest influence in the formation of the different zeolites. Thus, the optimal conditions to obtain NaP1 and ANA were 1 M NaOH solution for 6 h at 120 and 200 °C, respectively, while SOD was prepared at 120 °C for 6 h, using a very much higher alkali concentration (5 M). These zeolites exhibited similar characteristics to those obtained from conventional chemical reagents. Besides, the mother liquor from the synthesis of NaP1 was recycled twice in order to reduce water and alkalizing agent consumption. In this case, the only crystalline phase obtained was NaP1 showing morphological, textural and crystalline characteristics very similar to those of NaP1 prepared from fresh solutions. The results show that the aluminum waste can be transformed into different types of zeolites, considered as value-added materials, with promising adsorption properties.The authors also thank MINECO for its financial support (Project CTM2012-34449). R. Sánchez-Hernández thanks MINECO for the grant BES-2013-066269.Peer reviewedElsevierMinisterio de Economía y Competitividad (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2016info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Preprintinfo:eu-repo/semantics/submittedVersionhttp://hdl.handle.net/10261/129517reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.micromeso.2016.01.037Síinfo:eu-repo/semantics/openAccessoai:dnet:digitalcsic_::29652661c2295c0e8b61bc3a6b90454b2026-05-22T06:33:51Z
dc.title.none.fl_str_mv One-step synthesis of NaP1, SOD and ANA from a hazardous aluminum solid waste
title One-step synthesis of NaP1, SOD and ANA from a hazardous aluminum solid waste
spellingShingle One-step synthesis of NaP1, SOD and ANA from a hazardous aluminum solid waste
Sánchez-Hernández, R.
NaP1
Sodalite and analcime
Hazardous waste
One-step hydrothermal synthesis
High-CEC zeolite
title_short One-step synthesis of NaP1, SOD and ANA from a hazardous aluminum solid waste
title_full One-step synthesis of NaP1, SOD and ANA from a hazardous aluminum solid waste
title_fullStr One-step synthesis of NaP1, SOD and ANA from a hazardous aluminum solid waste
title_full_unstemmed One-step synthesis of NaP1, SOD and ANA from a hazardous aluminum solid waste
title_sort One-step synthesis of NaP1, SOD and ANA from a hazardous aluminum solid waste
dc.creator.none.fl_str_mv Sánchez-Hernández, R.
López-Delgado, Aurora
Padilla, Isabel
Galindo, R.
López-Andrés, Sol
author Sánchez-Hernández, R.
author_facet Sánchez-Hernández, R.
López-Delgado, Aurora
Padilla, Isabel
Galindo, R.
López-Andrés, Sol
author_role author
author2 López-Delgado, Aurora
Padilla, Isabel
Galindo, R.
López-Andrés, Sol
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv NaP1
Sodalite and analcime
Hazardous waste
One-step hydrothermal synthesis
High-CEC zeolite
topic NaP1
Sodalite and analcime
Hazardous waste
One-step hydrothermal synthesis
High-CEC zeolite
description NaP1, SOD, and ANA zeolites were synthesized from a hazardous aluminum waste as main aluminosilicate source by a one-step hydrothermal synthesis. This allowed the total transformation of the waste and no other solid residues were produced. The conversion of the waste into zeolites led to yields of ∼2.5 kg of zeolite per kg of waste. Experimental parameters such as stirring, time, temperature, and concentration of alkalizing agent (NaOH solution) were studied to determine the best synthesis conditions. Samples were characterized by different techniques such as XRD, SEM-EDS, FTIR, TG-DTA; textural properties such as BET specific surface area, zeta potential, granulometry and cation-exchange capacity (CEC) were also determined. Temperature and alkali concentration were the parameters with strongest influence in the formation of the different zeolites. Thus, the optimal conditions to obtain NaP1 and ANA were 1 M NaOH solution for 6 h at 120 and 200 °C, respectively, while SOD was prepared at 120 °C for 6 h, using a very much higher alkali concentration (5 M). These zeolites exhibited similar characteristics to those obtained from conventional chemical reagents. Besides, the mother liquor from the synthesis of NaP1 was recycled twice in order to reduce water and alkalizing agent consumption. In this case, the only crystalline phase obtained was NaP1 showing morphological, textural and crystalline characteristics very similar to those of NaP1 prepared from fresh solutions. The results show that the aluminum waste can be transformed into different types of zeolites, considered as value-added materials, with promising adsorption properties.
publishDate 2016
dc.date.none.fl_str_mv 2016
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Preprint
info:eu-repo/semantics/submittedVersion
format article
status_str submittedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/129517
url http://hdl.handle.net/10261/129517
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.micromeso.2016.01.037
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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