Comparative assessment of oxygen uptake rate of activated sludge and Escherichia coli exposed to nanomaterials

"The adverse effects of engineered nanomaterials (ENMs) on bacterial populations found in wastewater treatment plants (WWTPs) or natural systems have been studied for more than a decade, but conflicting evidence on the matter still makes it a subject of considerable concern. In this paper, the...

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Autores principales: Aude Luppi, Vergenie E., Oppezzo, Oscar J., Fidalgo de Cortalezzi, María Marta
Formato: Artículo de Publicación Periódica acceptedVersion
Lenguaje:Inglés
Publicado: 2023
Materias:
PLANTAS PARA TRATAMIENTO DE AGUA
AGUAS RESIDUALES
NANOPARTICUALES
DIOXIDO DE TITANIO
TOXICOLOGIA
Acceso en línea:https://ri.itba.edu.ar/handle/123456789/4146
Aporte de:
Repositorio Institucional Instituto Tecnológico de Buenos Aires (ITBA) de Instituto Tecnológico de Buenos Aires (ITBA)
id I32-R138-123456789-4146
record_format dspace
spelling I32-R138-123456789-41462023-01-12T03:01:06Z Comparative assessment of oxygen uptake rate of activated sludge and Escherichia coli exposed to nanomaterials Aude Luppi, Vergenie E. Oppezzo, Oscar J. Fidalgo de Cortalezzi, María Marta PLANTAS PARA TRATAMIENTO DE AGUA AGUAS RESIDUALES NANOPARTICUALES DIOXIDO DE TITANIO TOXICOLOGIA "The adverse effects of engineered nanomaterials (ENMs) on bacterial populations found in wastewater treatment plants (WWTPs) or natural systems have been studied for more than a decade, but conflicting evidence on the matter still makes it a subject of considerable concern. In this paper, the short-term exposure impact of titanium dioxide nanoparticles (nTiO2), carboxyl-functionalized multiwall carbon nanotubes (f-MWCNT), and zero-valent iron nanoparticles (nZVI) toward activated sludge and Escherichia coli (E. coli) was investigated through respiration inhibition experiments. Microorganisms were exposed to nanoparticle concentrations of 50, 100 and 200 mg/L (nTiO2, f-MWCNT) and 20, 50 and 100 mg/L (nZVI). The experiments showed that nTiO2 produced no inhibition in activated sludge or E. coli; up to 100 mg/L of nZVI did not inhibit the activated sludge respiration but 50 mg/L inhibited 24 ± 3% the respiration of E. coli and damaged its cell membrane. Activated sludge respiration was inhibited 17 ± 3% with 200 mg/L of f-MWCNT while for E. coli the inhibition was 36 ± 15% and the cell membrane was damaged with a 100 mg/L dose. Transmission electron microscopy (TEM) showed nTiO2-bacteria and nZVI-bacteria surface interaction while bacteria appeared punctured by f-MWCNT. E. coli was more susceptible than activated sludge to the nanomaterials and nZVI was more toxic than f-MWCNT for E. coli. These results demonstrated the absence of acute toxicity effects of the studied nanomaterials at those concentrations expected to occur in activated sludge facilities, and it would only be a concern in case of extremely high inputs, underscoring the resilience of WWTPs biological treatment." 2023-01-11T19:29:12Z 2023-01-11T19:29:12Z 2022-08 Artículo de Publicación Periódica info:eu-repo/semantics/acceptedVersion 2666-8211 https://ri.itba.edu.ar/handle/123456789/4146 en info:eu-repo/semantics/altIdentifier/10.1016/j.ceja.2022.100351 info:eu-repo/grantAgreement/ITBA/AR. Ciudad Autónoma de Buenos Aires 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 PLANTAS PARA TRATAMIENTO DE AGUA
AGUAS RESIDUALES
NANOPARTICUALES
DIOXIDO DE TITANIO
TOXICOLOGIA
spellingShingle PLANTAS PARA TRATAMIENTO DE AGUA
AGUAS RESIDUALES
NANOPARTICUALES
DIOXIDO DE TITANIO
TOXICOLOGIA
Aude Luppi, Vergenie E.
Oppezzo, Oscar J.
Fidalgo de Cortalezzi, María Marta
Comparative assessment of oxygen uptake rate of activated sludge and Escherichia coli exposed to nanomaterials
topic_facet PLANTAS PARA TRATAMIENTO DE AGUA
AGUAS RESIDUALES
NANOPARTICUALES
DIOXIDO DE TITANIO
TOXICOLOGIA
description "The adverse effects of engineered nanomaterials (ENMs) on bacterial populations found in wastewater treatment plants (WWTPs) or natural systems have been studied for more than a decade, but conflicting evidence on the matter still makes it a subject of considerable concern. In this paper, the short-term exposure impact of titanium dioxide nanoparticles (nTiO2), carboxyl-functionalized multiwall carbon nanotubes (f-MWCNT), and zero-valent iron nanoparticles (nZVI) toward activated sludge and Escherichia coli (E. coli) was investigated through respiration inhibition experiments. Microorganisms were exposed to nanoparticle concentrations of 50, 100 and 200 mg/L (nTiO2, f-MWCNT) and 20, 50 and 100 mg/L (nZVI). The experiments showed that nTiO2 produced no inhibition in activated sludge or E. coli; up to 100 mg/L of nZVI did not inhibit the activated sludge respiration but 50 mg/L inhibited 24 ± 3% the respiration of E. coli and damaged its cell membrane. Activated sludge respiration was inhibited 17 ± 3% with 200 mg/L of f-MWCNT while for E. coli the inhibition was 36 ± 15% and the cell membrane was damaged with a 100 mg/L dose. Transmission electron microscopy (TEM) showed nTiO2-bacteria and nZVI-bacteria surface interaction while bacteria appeared punctured by f-MWCNT. E. coli was more susceptible than activated sludge to the nanomaterials and nZVI was more toxic than f-MWCNT for E. coli. These results demonstrated the absence of acute toxicity effects of the studied nanomaterials at those concentrations expected to occur in activated sludge facilities, and it would only be a concern in case of extremely high inputs, underscoring the resilience of WWTPs biological treatment."
format Artículo de Publicación Periódica
acceptedVersion
author Aude Luppi, Vergenie E.
Oppezzo, Oscar J.
Fidalgo de Cortalezzi, María Marta
author_facet Aude Luppi, Vergenie E.
Oppezzo, Oscar J.
Fidalgo de Cortalezzi, María Marta
author_sort Aude Luppi, Vergenie E.
title Comparative assessment of oxygen uptake rate of activated sludge and Escherichia coli exposed to nanomaterials
title_short Comparative assessment of oxygen uptake rate of activated sludge and Escherichia coli exposed to nanomaterials
title_full Comparative assessment of oxygen uptake rate of activated sludge and Escherichia coli exposed to nanomaterials
title_fullStr Comparative assessment of oxygen uptake rate of activated sludge and Escherichia coli exposed to nanomaterials
title_full_unstemmed Comparative assessment of oxygen uptake rate of activated sludge and Escherichia coli exposed to nanomaterials
title_sort comparative assessment of oxygen uptake rate of activated sludge and escherichia coli exposed to nanomaterials
publishDate 2023
url https://ri.itba.edu.ar/handle/123456789/4146
work_keys_str_mv AT audeluppivergeniee comparativeassessmentofoxygenuptakerateofactivatedsludgeandescherichiacoliexposedtonanomaterials
AT oppezzooscarj comparativeassessmentofoxygenuptakerateofactivatedsludgeandescherichiacoliexposedtonanomaterials
AT fidalgodecortalezzimariamarta comparativeassessmentofoxygenuptakerateofactivatedsludgeandescherichiacoliexposedtonanomaterials
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