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Size-, Composition- and Shape-Dependent Toxicological Impact of Metal Oxide Nanoparticles and Carbon Nanotubes toward Bacteria

Ecotoxicological effects of nanoparticles (NP) are still poorly documented while their commercialization for industrial and household applications increases. The aim of this study was to evaluate the influence of physicochemical characteristics on metal oxide NP and carbon nanotubes toxicological ef...

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Published in:Environmental science & technology 2009-11, Vol.43 (21), p.8423-8429
Main Authors: Simon-Deckers, Angélique, Loo, Sylvain, Mayne-L’hermite, Martine, Herlin-Boime, Nathalie, Menguy, Nicolas, Reynaud, Cécile, Gouget, Barbara, Carrière, Marie
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cited_by cdi_FETCH-LOGICAL-a437t-6eadf42408dcad6aa7778d8cf36b38fb5a97a73e7cc7f478a8868e17825cd46b3
cites cdi_FETCH-LOGICAL-a437t-6eadf42408dcad6aa7778d8cf36b38fb5a97a73e7cc7f478a8868e17825cd46b3
container_end_page 8429
container_issue 21
container_start_page 8423
container_title Environmental science & technology
container_volume 43
creator Simon-Deckers, Angélique
Loo, Sylvain
Mayne-L’hermite, Martine
Herlin-Boime, Nathalie
Menguy, Nicolas
Reynaud, Cécile
Gouget, Barbara
Carrière, Marie
description Ecotoxicological effects of nanoparticles (NP) are still poorly documented while their commercialization for industrial and household applications increases. The aim of this study was to evaluate the influence of physicochemical characteristics on metal oxide NP and carbon nanotubes toxicological effects toward bacteria. Two strains of bacteria, Cupriavidus metallidurans CH34 and Escherichia coli MG1655 were exposed to TiO2 or Al2O3 NP or to multiwalled-carbon nanotubes (MWCNT). Particular attention was paid on optimizing NP dispersion to obtain nonagglomerated suspensions. Our results show that NP toxicity depends on their chemical composition, size, surface charge, and shape but not on their crystalline phase. MWCNT toxicity does not depend on their purity. Toxicity also depends on the bacterial strain: E. coli MG1655 is sensitive to NP, whereas C. metallidurans CH34 is not. Interestingly, NP are accumulated in both bacterial strains, and association between NP and bacteria is necessary for bacterial death to occur. NP may then represent a danger for the environment, causing the disappearance of some sensitive bacterial strains such as E. coli MG1655, but also being mobilized by nonsensitive strains such as C. metallidurans CH34 and transported through the whole ecosystem.
doi_str_mv 10.1021/es9016975
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subjects Applied sciences
Bacteria
Bacteria - cytology
Bacteria - drug effects
Bacteria - ultrastructure
Carbon
Chemical Sciences
Crystals
Culture Media
E coli
Ecotoxicology and Human Environmental Health
Effects
Environmental Exposure - analysis
Escherichia coli
Exact sciences and technology
Intracellular Space - drug effects
Intracellular Space - metabolism
Metal Nanoparticles - chemistry
Metal Nanoparticles - microbiology
Metal Nanoparticles - toxicity
Metal Nanoparticles - ultrastructure
Metal oxides
Microbial Viability - drug effects
Nanoparticles
Nanotubes
Nanotubes, Carbon - chemistry
Nanotubes, Carbon - microbiology
Nanotubes, Carbon - toxicity
or physical chemistry
Oxides - chemistry
Oxides - toxicity
Particle Size
Pollution
Reactive Oxygen Species - metabolism
Studies
Theoretical and
Toxicity
title Size-, Composition- and Shape-Dependent Toxicological Impact of Metal Oxide Nanoparticles and Carbon Nanotubes toward Bacteria
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