Virus removal by iron oxide ceramic membranes

"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 mea...

Descripción completa

Detalles Bibliográficos
Autores principales: Fidalgo de Cortalezzi, María Marta, Gallardo, María V., Yrazu, Fernando M., Gentile, Guillermina José, Opezzo, Oscar, Pizarro, Ramón A., Poma, Hugo R., Rajal, Verónica Beatriz
Formato: Artículos de Publicaciones Periódicas acceptedVersion
Lenguaje:Inglés
Publicado: info
Materias:
NANOPARTICULAS
OXIDO DE HIERRO
MEMBRANAS CERAMICAS
TRATAMIENTO DEL AGUA
VIRUS
Acceso en línea:http://ri.itba.edu.ar/handle/123456789/3219
Aporte de:
Repositorio Institucional Instituto Tecnológico de Buenos Aires (ITBA) de Instituto Tecnológico de Buenos Aires (ITBA)
id I32-R138-123456789-3219
record_format dspace
spelling I32-R138-123456789-32192022-12-07T13:06:08Z Virus removal by iron oxide ceramic membranes Fidalgo de Cortalezzi, María Marta Gallardo, María V. Yrazu, Fernando M. Gentile, Guillermina José Opezzo, Oscar Pizarro, Ramón A. Poma, Hugo R. Rajal, Verónica Beatriz NANOPARTICULAS OXIDO DE HIERRO MEMBRANAS CERAMICAS TRATAMIENTO DEL AGUA VIRUS "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." info:eu-repo/date/embargoEnd/2016-09-01 2020-10-28T16:25:09Z 2020-10-28T16:25:09Z 2014-09 Artículos de Publicaciones Periódicas info:eu-repo/semantics/acceptedVersion 2213-3437 http://ri.itba.edu.ar/handle/123456789/3219 en info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jece.2014.08.006 info:eu-repo/semantics/embargoedAccess 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 NANOPARTICULAS
OXIDO DE HIERRO
MEMBRANAS CERAMICAS
TRATAMIENTO DEL AGUA
VIRUS
spellingShingle NANOPARTICULAS
OXIDO DE HIERRO
MEMBRANAS CERAMICAS
TRATAMIENTO DEL AGUA
VIRUS
Fidalgo de Cortalezzi, María Marta
Gallardo, María V.
Yrazu, Fernando M.
Gentile, Guillermina José
Opezzo, Oscar
Pizarro, Ramón A.
Poma, Hugo R.
Rajal, Verónica Beatriz
Virus removal by iron oxide ceramic membranes
topic_facet NANOPARTICULAS
OXIDO DE HIERRO
MEMBRANAS CERAMICAS
TRATAMIENTO DEL AGUA
VIRUS
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 Artículos de Publicaciones Periódicas
acceptedVersion
author Fidalgo de Cortalezzi, María Marta
Gallardo, María V.
Yrazu, Fernando M.
Gentile, Guillermina José
Opezzo, Oscar
Pizarro, Ramón A.
Poma, Hugo R.
Rajal, Verónica Beatriz
author_facet Fidalgo de Cortalezzi, María Marta
Gallardo, María V.
Yrazu, Fernando M.
Gentile, Guillermina José
Opezzo, Oscar
Pizarro, Ramón A.
Poma, Hugo R.
Rajal, Verónica Beatriz
author_sort Fidalgo de Cortalezzi, María Marta
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 info
url http://ri.itba.edu.ar/handle/123456789/3219
work_keys_str_mv AT fidalgodecortalezzimariamarta virusremovalbyironoxideceramicmembranes
AT gallardomariav virusremovalbyironoxideceramicmembranes
AT yrazufernandom virusremovalbyironoxideceramicmembranes
AT gentileguillerminajose virusremovalbyironoxideceramicmembranes
AT opezzooscar virusremovalbyironoxideceramicmembranes
AT pizarroramona virusremovalbyironoxideceramicmembranes
AT pomahugor virusremovalbyironoxideceramicmembranes
AT rajalveronicabeatriz virusremovalbyironoxideceramicmembranes
_version_ 1765660921793871872

Ejemplares similares