Enhanced retention of bacteria by TiO2 nanoparticles in saturated porous media

The simultaneous transport of TiO2 nanoparticles and bacteria Pseudomonas aeruginosa in saturated porous media was investigated. Nanoparticle and bacterium size and surface charge were measured as a function of electrolyte concentration. Sand column breakthrough curves were obtained for single and c...

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Autores principales: Gentile, Guillermina J., Fidalgo de Cortalezzi, María M.
Formato: Artículo de publicación periódica
Lenguaje:Inglés
Publicado: 2024
Materias:
BACTERIAS
TRANSPORTE DE NANOPARTÍCULAS
DIÓXIDO DE TITANIO
Acceso en línea:https://ri.itba.edu.ar/handle/20.500.14769/4450
Aporte de:
Repositorio Institucional Instituto Tecnológico de Buenos Aires (ITBA) de Instituto Tecnológico de Buenos Aires (ITBA)
id I32-R138-20.500.14769-4450
record_format dspace
spelling I32-R138-20.500.14769-44502026-01-15T15:15:54Z Enhanced retention of bacteria by TiO2 nanoparticles in saturated porous media Gentile, Guillermina J. Fidalgo de Cortalezzi, María M. BACTERIAS TRANSPORTE DE NANOPARTÍCULAS DIÓXIDO DE TITANIO The simultaneous transport of TiO2 nanoparticles and bacteria Pseudomonas aeruginosa in saturated porous media was investigated. Nanoparticle and bacterium size and surface charge were measured as a function of electrolyte concentration. Sand column breakthrough curves were obtained for single and combined suspensions, at four different ionic strengths. DLVO and classical filtration theories were employed to model the interactions between particles and between particles and sand grains. Attachment of TiO2 to the sand was explained by electrostatic forces and these nanoparticles acted as bonds between the bacteria and the sand, leading to retention. Presence of TiO2 significantly increased the retention of bacteria in the sand bed, but microorganisms were released when nanomaterial influx ceased. The inclusion of nanomaterials in saturated porous media may have implications for the design and operation of sand filters in water treatment. 2024-04-25T15:43:09Z 2024-04-25T15:43:09Z 2016 Artículo de publicación periódica https://ri.itba.edu.ar/handle/20.500.14769/4450 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 BACTERIAS
TRANSPORTE DE NANOPARTÍCULAS
DIÓXIDO DE TITANIO
spellingShingle BACTERIAS
TRANSPORTE DE NANOPARTÍCULAS
DIÓXIDO DE TITANIO
Gentile, Guillermina J.
Fidalgo de Cortalezzi, María M.
Enhanced retention of bacteria by TiO2 nanoparticles in saturated porous media
topic_facet BACTERIAS
TRANSPORTE DE NANOPARTÍCULAS
DIÓXIDO DE TITANIO
description The simultaneous transport of TiO2 nanoparticles and bacteria Pseudomonas aeruginosa in saturated porous media was investigated. Nanoparticle and bacterium size and surface charge were measured as a function of electrolyte concentration. Sand column breakthrough curves were obtained for single and combined suspensions, at four different ionic strengths. DLVO and classical filtration theories were employed to model the interactions between particles and between particles and sand grains. Attachment of TiO2 to the sand was explained by electrostatic forces and these nanoparticles acted as bonds between the bacteria and the sand, leading to retention. Presence of TiO2 significantly increased the retention of bacteria in the sand bed, but microorganisms were released when nanomaterial influx ceased. The inclusion of nanomaterials in saturated porous media may have implications for the design and operation of sand filters in water treatment.
format Artículo de publicación periódica
author Gentile, Guillermina J.
Fidalgo de Cortalezzi, María M.
author_facet Gentile, Guillermina J.
Fidalgo de Cortalezzi, María M.
author_sort Gentile, Guillermina J.
title Enhanced retention of bacteria by TiO2 nanoparticles in saturated porous media
title_short Enhanced retention of bacteria by TiO2 nanoparticles in saturated porous media
title_full Enhanced retention of bacteria by TiO2 nanoparticles in saturated porous media
title_fullStr Enhanced retention of bacteria by TiO2 nanoparticles in saturated porous media
title_full_unstemmed Enhanced retention of bacteria by TiO2 nanoparticles in saturated porous media
title_sort enhanced retention of bacteria by tio2 nanoparticles in saturated porous media
publishDate 2024
url https://ri.itba.edu.ar/handle/20.500.14769/4450
work_keys_str_mv AT gentileguillerminaj enhancedretentionofbacteriabytio2nanoparticlesinsaturatedporousmedia
AT fidalgodecortalezzimariam enhancedretentionofbacteriabytio2nanoparticlesinsaturatedporousmedia
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