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

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 p...

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Autores principales: Rivera Enríquez, Claudia E., Gonzalez, Maximiliano Ricardo, Barraqué, Facundo, Pereyra, Andrea Marisa, Basaldella, Elena Isabel
Formato: Articulo
Lenguaje:Inglés
Publicado: 2022
Materias:
Ingeniería
Ciencias Exactas
Clay
Calcination
Alkaline activation
Hydrothermal synthesis
Hard-core/zeolitized-shell
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/153494
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-153494
record_format dspace
spelling I19-R120-10915-1534942023-05-23T20:07:44Z http://sedici.unlp.edu.ar/handle/10915/153494 issn:2590-1230 Hard-core/zeolitized-shell beads obtained by surface zeolitization of activated clay particles Rivera Enríquez, Claudia E. Gonzalez, Maximiliano Ricardo Barraqué, Facundo Pereyra, Andrea Marisa Basaldella, Elena Isabel 2022-12 2023-05-23T18:01:08Z en Ingeniería Ciencias Exactas Clay Calcination Alkaline activation Hydrothermal synthesis Hard-core/zeolitized-shell 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 Articulo Articulo http://creativecommons.org/licenses/by-nc-nd/4.0/ Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) application/pdf
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ingeniería
Ciencias Exactas
Clay
Calcination
Alkaline activation
Hydrothermal synthesis
Hard-core/zeolitized-shell
spellingShingle Ingeniería
Ciencias Exactas
Clay
Calcination
Alkaline activation
Hydrothermal synthesis
Hard-core/zeolitized-shell
Rivera Enríquez, Claudia E.
Gonzalez, Maximiliano Ricardo
Barraqué, Facundo
Pereyra, Andrea Marisa
Basaldella, Elena Isabel
Hard-core/zeolitized-shell beads obtained by surface zeolitization of activated clay particles
topic_facet Ingeniería
Ciencias Exactas
Clay
Calcination
Alkaline activation
Hydrothermal synthesis
Hard-core/zeolitized-shell
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.
format Articulo
Articulo
author Rivera Enríquez, Claudia E.
Gonzalez, Maximiliano Ricardo
Barraqué, Facundo
Pereyra, Andrea Marisa
Basaldella, Elena Isabel
author_facet Rivera Enríquez, Claudia E.
Gonzalez, Maximiliano Ricardo
Barraqué, Facundo
Pereyra, Andrea Marisa
Basaldella, Elena Isabel
author_sort Rivera Enríquez, Claudia E.
title Hard-core/zeolitized-shell beads obtained by surface zeolitization of activated clay particles
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
publishDate 2022
url http://sedici.unlp.edu.ar/handle/10915/153494
work_keys_str_mv AT riveraenriquezclaudiae hardcorezeolitizedshellbeadsobtainedbysurfacezeolitizationofactivatedclayparticles
AT gonzalezmaximilianoricardo hardcorezeolitizedshellbeadsobtainedbysurfacezeolitizationofactivatedclayparticles
AT barraquefacundo hardcorezeolitizedshellbeadsobtainedbysurfacezeolitizationofactivatedclayparticles
AT pereyraandreamarisa hardcorezeolitizedshellbeadsobtainedbysurfacezeolitizationofactivatedclayparticles
AT basaldellaelenaisabel hardcorezeolitizedshellbeadsobtainedbysurfacezeolitizationofactivatedclayparticles
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