Hard-core/zeolitized-shell beads obtained by surface zeolitization of activated clay particles

Autores
Rivera Enríquez, Claudia E.; Gonzalez, Maximiliano Ricardo; Barraqué, Facundo; Pereyra, Andrea Marisa; Basaldella, Elena Isabel
Año de publicación
2022
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
This work presents a novel and cost-effective procedure that improves the reactivity of kaolinitic clay particles toward the generation of millimetric hard-core/zeolitized-shell units. The obtained particulate material is ready to use as ion exchanger beads in a fixed adsorption bed. Starting from properly activated, millimeter-sized clay units, the transition of their external surface towards a new crystalline ordering could be induced. The Na₂CO₃ alkaline activation treatment applied to previously calcined clay particles allowed obtaining different levels of NaAlSiO₄ polymorphs on the external surface of the particles, which are easily transformed to zeolitic products. By varying the synthesis conditions, FAU and LTA zeolite structures were successfully obtained on the surface of hardened particles, reaching conversions close to 90%. The starting clay, pretreated clays, and products obtained after hydrothermal synthesis were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray microanalysis (EDX). The versatility of the method is exemplified in obtaining adsorbents specifically designed for the retention of Cd²⁺ and Ni²⁺ contaminating ions. A total removal of Cd²⁺ and Ni²⁺ was achieved at 150 min from initial 40 ppm solutions, being 98% and 94% from initial 120 ppm solutions for cadmium and nickel, respectively.
Centro de Investigación y Desarrollo en Ciencias Aplicadas
Centro de Tecnología de Recursos Minerales y Cerámica
Materia
Ingeniería
Ciencias Exactas
Clay
Calcination
Alkaline activation
Hydrothermal synthesis
Hard-core/zeolitized-shell
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-nd/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/153494

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oai_identifier_str oai:sedici.unlp.edu.ar:10915/153494
network_acronym_str SEDICI
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network_name_str SEDICI (UNLP)
spelling Hard-core/zeolitized-shell beads obtained by surface zeolitization of activated clay particlesRivera Enríquez, Claudia E.Gonzalez, Maximiliano RicardoBarraqué, FacundoPereyra, Andrea MarisaBasaldella, Elena IsabelIngenieríaCiencias ExactasClayCalcinationAlkaline activationHydrothermal synthesisHard-core/zeolitized-shellThis work presents a novel and cost-effective procedure that improves the reactivity of kaolinitic clay particles toward the generation of millimetric hard-core/zeolitized-shell units. The obtained particulate material is ready to use as ion exchanger beads in a fixed adsorption bed. Starting from properly activated, millimeter-sized clay units, the transition of their external surface towards a new crystalline ordering could be induced. The Na₂CO₃ alkaline activation treatment applied to previously calcined clay particles allowed obtaining different levels of NaAlSiO₄ polymorphs on the external surface of the particles, which are easily transformed to zeolitic products. By varying the synthesis conditions, FAU and LTA zeolite structures were successfully obtained on the surface of hardened particles, reaching conversions close to 90%. The starting clay, pretreated clays, and products obtained after hydrothermal synthesis were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray microanalysis (EDX). The versatility of the method is exemplified in obtaining adsorbents specifically designed for the retention of Cd²⁺ and Ni²⁺ contaminating ions. A total removal of Cd²⁺ and Ni²⁺ was achieved at 150 min from initial 40 ppm solutions, being 98% and 94% from initial 120 ppm solutions for cadmium and nickel, respectively.Centro de Investigación y Desarrollo en Ciencias AplicadasCentro de Tecnología de Recursos Minerales y Cerámica2022-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/153494enginfo:eu-repo/semantics/altIdentifier/issn/2590-1230info:eu-repo/semantics/altIdentifier/doi/10.1016/j.rineng.2022.100624info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0/Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:39:39Zoai:sedici.unlp.edu.ar:10915/153494Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:39:39.784SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Hard-core/zeolitized-shell beads obtained by surface zeolitization of activated clay particles
title Hard-core/zeolitized-shell beads obtained by surface zeolitization of activated clay particles
spellingShingle Hard-core/zeolitized-shell beads obtained by surface zeolitization of activated clay particles
Rivera Enríquez, Claudia E.
Ingeniería
Ciencias Exactas
Clay
Calcination
Alkaline activation
Hydrothermal synthesis
Hard-core/zeolitized-shell
title_short Hard-core/zeolitized-shell beads obtained by surface zeolitization of activated clay particles
title_full Hard-core/zeolitized-shell beads obtained by surface zeolitization of activated clay particles
title_fullStr Hard-core/zeolitized-shell beads obtained by surface zeolitization of activated clay particles
title_full_unstemmed Hard-core/zeolitized-shell beads obtained by surface zeolitization of activated clay particles
title_sort Hard-core/zeolitized-shell beads obtained by surface zeolitization of activated clay particles
dc.creator.none.fl_str_mv Rivera Enríquez, Claudia E.
Gonzalez, Maximiliano Ricardo
Barraqué, Facundo
Pereyra, Andrea Marisa
Basaldella, Elena Isabel
author Rivera Enríquez, Claudia E.
author_facet Rivera Enríquez, Claudia E.
Gonzalez, Maximiliano Ricardo
Barraqué, Facundo
Pereyra, Andrea Marisa
Basaldella, Elena Isabel
author_role author
author2 Gonzalez, Maximiliano Ricardo
Barraqué, Facundo
Pereyra, Andrea Marisa
Basaldella, Elena Isabel
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ingeniería
Ciencias Exactas
Clay
Calcination
Alkaline activation
Hydrothermal synthesis
Hard-core/zeolitized-shell
topic Ingeniería
Ciencias Exactas
Clay
Calcination
Alkaline activation
Hydrothermal synthesis
Hard-core/zeolitized-shell
dc.description.none.fl_txt_mv This work presents a novel and cost-effective procedure that improves the reactivity of kaolinitic clay particles toward the generation of millimetric hard-core/zeolitized-shell units. The obtained particulate material is ready to use as ion exchanger beads in a fixed adsorption bed. Starting from properly activated, millimeter-sized clay units, the transition of their external surface towards a new crystalline ordering could be induced. The Na₂CO₃ alkaline activation treatment applied to previously calcined clay particles allowed obtaining different levels of NaAlSiO₄ polymorphs on the external surface of the particles, which are easily transformed to zeolitic products. By varying the synthesis conditions, FAU and LTA zeolite structures were successfully obtained on the surface of hardened particles, reaching conversions close to 90%. The starting clay, pretreated clays, and products obtained after hydrothermal synthesis were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray microanalysis (EDX). The versatility of the method is exemplified in obtaining adsorbents specifically designed for the retention of Cd²⁺ and Ni²⁺ contaminating ions. A total removal of Cd²⁺ and Ni²⁺ was achieved at 150 min from initial 40 ppm solutions, being 98% and 94% from initial 120 ppm solutions for cadmium and nickel, respectively.
Centro de Investigación y Desarrollo en Ciencias Aplicadas
Centro de Tecnología de Recursos Minerales y Cerámica
description This work presents a novel and cost-effective procedure that improves the reactivity of kaolinitic clay particles toward the generation of millimetric hard-core/zeolitized-shell units. The obtained particulate material is ready to use as ion exchanger beads in a fixed adsorption bed. Starting from properly activated, millimeter-sized clay units, the transition of their external surface towards a new crystalline ordering could be induced. The Na₂CO₃ alkaline activation treatment applied to previously calcined clay particles allowed obtaining different levels of NaAlSiO₄ polymorphs on the external surface of the particles, which are easily transformed to zeolitic products. By varying the synthesis conditions, FAU and LTA zeolite structures were successfully obtained on the surface of hardened particles, reaching conversions close to 90%. The starting clay, pretreated clays, and products obtained after hydrothermal synthesis were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray microanalysis (EDX). The versatility of the method is exemplified in obtaining adsorbents specifically designed for the retention of Cd²⁺ and Ni²⁺ contaminating ions. A total removal of Cd²⁺ and Ni²⁺ was achieved at 150 min from initial 40 ppm solutions, being 98% and 94% from initial 120 ppm solutions for cadmium and nickel, respectively.
publishDate 2022
dc.date.none.fl_str_mv 2022-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/153494
url http://sedici.unlp.edu.ar/handle/10915/153494
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/2590-1230
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.rineng.2022.100624
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
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reponame_str SEDICI (UNLP)
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instname_str Universidad Nacional de La Plata
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repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
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