Virus removal by iron oxide ceramic membranes

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Nanoporous iron oxide ceramics were studied for the removal of virus contamination from water. Supported and unsupported iron oxide nanostructured hematite was fabricated by a green chemistry route from ferroxane nanoparticles. The material had a surface area of approximately 30 m2 /g and a mean por...

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Autores principales: Fidalgo de Cortalezzi, María M., Gallardo, María V., Yrazu, Fernando, Gentile, Guillermina J., Opezzo, Oscar, Pizarro, Ramon, Poma, Hugo R., Rajal, Verónica B.
Formato: Artículo de publicación periódica
Lenguaje:Inglés
Publicado: 2024
Materias:
MEMBRANAS DE CERÁMICA
ÓXIDOS DE HIERRO
NANOPARTÍCULAS
CONTAMINACIÓN VIRAL
VIRUS
TRATAMIENTO DE AGUA
Acceso en línea:https://ri.itba.edu.ar/handle/20.500.14769/4452
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Repositorio Institucional Instituto Tecnológico de Buenos Aires (ITBA) de Instituto Tecnológico de Buenos Aires (ITBA)
id I32-R138-20.500.14769-4452
record_format dspace
spelling I32-R138-20.500.14769-44522026-01-15T15:29:48Z Virus removal by iron oxide ceramic membranes Fidalgo de Cortalezzi, María M. Gallardo, María V. Yrazu, Fernando Gentile, Guillermina J. Opezzo, Oscar Pizarro, Ramon Poma, Hugo R. Rajal, Verónica B. MEMBRANAS DE CERÁMICA ÓXIDOS DE HIERRO NANOPARTÍCULAS CONTAMINACIÓN VIRAL VIRUS TRATAMIENTO DE AGUA Nanoporous iron oxide ceramics were studied for the removal of virus contamination from water. Supported and unsupported iron oxide nanostructured hematite was fabricated by a green chemistry route from ferroxane nanoparticles. The material had a surface area of approximately 30 m2 /g and a mean pore size of 65 nm. Bacteriophage P22 was chosen as a model for human virus. The kinetics and equilibrium of the attachment process was investigated. P22 adsorption isotherms on iron oxide were described by the Freundlich equation. Batch experiments resulted in 1.5 LRVs. Removal proceeded rapidly for the first 7 h; next, a diffusion-limited stage occurred. Dynamic attachment experiments demanded extensive recirculation to achieve significant reduction levels. Up to 3 LRV were observed. The enhanced performance can be explained by the higher iron oxide area available and the facilitated access to inner porosity sites that were previously unavailable due to slow diffusion. The role of electrostatic interactions in the attachment mechanisms was confirmed by the dependence of the isotherm on the ionic strength of the suspension medium. P22 bacteriophage is expected to attach to the iron oxide by electrostatic forces up to a pH of 6.5. DLVO theory predicts moderately well the interaction energies between P22 particles themselves and between the phage and the ceramic. However, a slight underestimation of the P22–P22 repulsive forces was evident by comparison to the experimental data. 2024-04-30T15:51:23Z 2024-04-30T15:51:23Z 2014 Artículo de publicación periódica https://ri.itba.edu.ar/handle/20.500.14769/4452 en application/pdf
institution Instituto Tecnológico de Buenos Aires (ITBA)
institution_str I-32
repository_str R-138
collection Repositorio Institucional Instituto Tecnológico de Buenos Aires (ITBA)
language Inglés
topic MEMBRANAS DE CERÁMICA
ÓXIDOS DE HIERRO
NANOPARTÍCULAS
CONTAMINACIÓN VIRAL
VIRUS
TRATAMIENTO DE AGUA
spellingShingle MEMBRANAS DE CERÁMICA
ÓXIDOS DE HIERRO
NANOPARTÍCULAS
CONTAMINACIÓN VIRAL
VIRUS
TRATAMIENTO DE AGUA
Fidalgo de Cortalezzi, María M.
Gallardo, María V.
Yrazu, Fernando
Gentile, Guillermina J.
Opezzo, Oscar
Pizarro, Ramon
Poma, Hugo R.
Rajal, Verónica B.
Virus removal by iron oxide ceramic membranes
topic_facet MEMBRANAS DE CERÁMICA
ÓXIDOS DE HIERRO
NANOPARTÍCULAS
CONTAMINACIÓN VIRAL
VIRUS
TRATAMIENTO DE AGUA
description Nanoporous iron oxide ceramics were studied for the removal of virus contamination from water. Supported and unsupported iron oxide nanostructured hematite was fabricated by a green chemistry route from ferroxane nanoparticles. The material had a surface area of approximately 30 m2 /g and a mean pore size of 65 nm. Bacteriophage P22 was chosen as a model for human virus. The kinetics and equilibrium of the attachment process was investigated. P22 adsorption isotherms on iron oxide were described by the Freundlich equation. Batch experiments resulted in 1.5 LRVs. Removal proceeded rapidly for the first 7 h; next, a diffusion-limited stage occurred. Dynamic attachment experiments demanded extensive recirculation to achieve significant reduction levels. Up to 3 LRV were observed. The enhanced performance can be explained by the higher iron oxide area available and the facilitated access to inner porosity sites that were previously unavailable due to slow diffusion. The role of electrostatic interactions in the attachment mechanisms was confirmed by the dependence of the isotherm on the ionic strength of the suspension medium. P22 bacteriophage is expected to attach to the iron oxide by electrostatic forces up to a pH of 6.5. DLVO theory predicts moderately well the interaction energies between P22 particles themselves and between the phage and the ceramic. However, a slight underestimation of the P22–P22 repulsive forces was evident by comparison to the experimental data.
format Artículo de publicación periódica
author Fidalgo de Cortalezzi, María M.
Gallardo, María V.
Yrazu, Fernando
Gentile, Guillermina J.
Opezzo, Oscar
Pizarro, Ramon
Poma, Hugo R.
Rajal, Verónica B.
author_facet Fidalgo de Cortalezzi, María M.
Gallardo, María V.
Yrazu, Fernando
Gentile, Guillermina J.
Opezzo, Oscar
Pizarro, Ramon
Poma, Hugo R.
Rajal, Verónica B.
author_sort Fidalgo de Cortalezzi, María M.
title Virus removal by iron oxide ceramic membranes
title_short Virus removal by iron oxide ceramic membranes
title_full Virus removal by iron oxide ceramic membranes
title_fullStr Virus removal by iron oxide ceramic membranes
title_full_unstemmed Virus removal by iron oxide ceramic membranes
title_sort virus removal by iron oxide ceramic membranes
publishDate 2024
url https://ri.itba.edu.ar/handle/20.500.14769/4452
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