Obtention and characterization of a hybridnanocomposite monolith by sol–gel process
A monolithic porous composite was synthesized by sol–gel process, containing the maximum and significant amount of bentonite that allows its use as a filter bed in aqueous effluents treatment. This process is able to apply on an industrial scale. The bentonite used was an efficient adsorbent for va...
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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2023
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/160103 |
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I19-R120-10915-1601032023-11-14T20:07:03Z http://sedici.unlp.edu.ar/handle/10915/160103 Obtention and characterization of a hybridnanocomposite monolith by sol–gel process Obtención y caracterización de un nanocompuesto monolítico híbrido vía proceso sol-gel Legarto, María Celeste Benito, Damián Ezequiel Scian, Alberto Néstor Lombardi, María Bárbara 2023 2023-11-14T11:38:55Z en Química Sol–gel Nanocomposite Bentonite Filter bed composite Water treatment Nanocompuesto Bentonita Lecho filtrante compuesto Tratamiento de aguas A monolithic porous composite was synthesized by sol–gel process, containing the maximum and significant amount of bentonite that allows its use as a filter bed in aqueous effluents treatment. This process is able to apply on an industrial scale. The bentonite used was an efficient adsorbent for various contaminant molecules in aqueous media when is operated in a batch stirred tank, but presents difficulty in the separation stage of suspended particles. In this laboratory-scale work, cylindrical monoliths of 9 cm length by 2 cm diameter were made that can be used as a filter bed. The primary composite, silica-resin, was prepared by the sol–gel precursor mixture of the partially hydrolyzed tetraethylorthosilicate and a phenol-formaldehyde resin. Bentonite was added to the pre-gelling, obtaining the silica-resin-bentonite composite, made up the gel which is then dried and cured at 270 °C. The different composites mineralogical and structurally were evaluated. The preliminary performance of the developed bentonite filter bed showed almost 90% adsorption of diphenylamine, a commercial agrochemical widely used as anti-antiscaldant in postharvest treatment of fruit, and showed that the bentonite conserves its adsorption capacity and controls the swelling of the interlayer space which encourages further research studies applied to water treatment. Se sintetizó vía sol-gel un compuesto híbrido monolítico poroso, con la máxima cantidad significativa de bentonita que permite su uso como lecho filtrante, lo que podría aplicarse en el tratamiento de efluentes acuosos a escala industrial. La bentonita utilizada es un eficiente adsorbente de varias moléculas de contaminantes presentes en medios acuosos cuando se opera por lotes en tanque agitado, pero presenta la dificultad de separar las partículas suspendidas. Para este trabajo a escala de laboratorio se realizaron monolitos cilíndricos de 9 cm de largo por 2 cm de diámetro que pueden ser usados como lecho filtrante. El compuesto primario, sílice-resina, se preparó mediante la mezcla precursora sol-gel de tetraetilortosilicato parcialmente hidrolizado y resina fenol-formaldehído. Se añadió bentonita a la mezcla precursora durante la gelificación, para obtener el compuesto sílice-resina-bentonita. Luego del proceso de envejecimiento del gel se cura a 270 °C. Los diferentes compuestos fueron evaluados mineralógica y estructuralmente. El rendimiento preliminar mostró casi el 90% de adsorción de difenilamina, un agroquímico comercial altamente utilizado como antiescaldante en las industrias poscosecha de frutas, y mostró que la bentonita conserva su capacidad de adsorción y controla el hinchamiento del espacio interlaminar, lo que motiva a futuras investigaciones aplicadas al tratamiento de aguas. 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 |
Química Sol–gel Nanocomposite Bentonite Filter bed composite Water treatment Nanocompuesto Bentonita Lecho filtrante compuesto Tratamiento de aguas |
| spellingShingle |
Química Sol–gel Nanocomposite Bentonite Filter bed composite Water treatment Nanocompuesto Bentonita Lecho filtrante compuesto Tratamiento de aguas Legarto, María Celeste Benito, Damián Ezequiel Scian, Alberto Néstor Lombardi, María Bárbara Obtention and characterization of a hybridnanocomposite monolith by sol–gel process |
| topic_facet |
Química Sol–gel Nanocomposite Bentonite Filter bed composite Water treatment Nanocompuesto Bentonita Lecho filtrante compuesto Tratamiento de aguas |
| description |
A monolithic porous composite was synthesized by sol–gel process, containing the maximum and significant amount of bentonite that allows its use as a filter bed in aqueous effluents treatment. This process is able to apply on an industrial scale.
The bentonite used was an efficient adsorbent for various contaminant molecules in aqueous media when is operated in a batch stirred tank, but presents difficulty in the separation stage of suspended particles. In this laboratory-scale work, cylindrical monoliths of 9 cm length by 2 cm diameter were made that can be used as a filter bed. The primary composite, silica-resin, was prepared by the sol–gel precursor mixture of the partially hydrolyzed tetraethylorthosilicate and a phenol-formaldehyde resin. Bentonite was added to the pre-gelling, obtaining the silica-resin-bentonite composite, made up the gel which is then dried and cured at 270 °C. The different composites mineralogical and structurally were evaluated. The preliminary performance of the developed bentonite filter bed showed almost 90% adsorption of diphenylamine, a commercial agrochemical widely used as anti-antiscaldant in postharvest treatment of fruit, and showed that the bentonite conserves its adsorption capacity and controls the swelling of the interlayer space which encourages further research studies applied to water treatment. |
| format |
Articulo Articulo |
| author |
Legarto, María Celeste Benito, Damián Ezequiel Scian, Alberto Néstor Lombardi, María Bárbara |
| author_facet |
Legarto, María Celeste Benito, Damián Ezequiel Scian, Alberto Néstor Lombardi, María Bárbara |
| author_sort |
Legarto, María Celeste |
| title |
Obtention and characterization of a hybridnanocomposite monolith by sol–gel process |
| title_short |
Obtention and characterization of a hybridnanocomposite monolith by sol–gel process |
| title_full |
Obtention and characterization of a hybridnanocomposite monolith by sol–gel process |
| title_fullStr |
Obtention and characterization of a hybridnanocomposite monolith by sol–gel process |
| title_full_unstemmed |
Obtention and characterization of a hybridnanocomposite monolith by sol–gel process |
| title_sort |
obtention and characterization of a hybridnanocomposite monolith by sol–gel process |
| publishDate |
2023 |
| url |
http://sedici.unlp.edu.ar/handle/10915/160103 |
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