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
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/153494
Ver los metadatos del registro completo
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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 Articulo http://purl.org/coar/resource_type/c_6501 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) |
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openAccess |
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http://creativecommons.org/licenses/by-nc-nd/4.0/ Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) |
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