Implications of handling practices on the ecotoxic profile of alumina nanoparticles towards the bacteria Vibrio fischeri

The complex nature and behavior of Engineered Nanomaterials (ENMs) has led to adoption of customized experimental ecotoxicity practices that are prone to possible artefacts in the inherent toxic properties of ENMs. In addition, the lack of standardized handling procedures for the ecotoxicity testing...

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Bibliographic Details
Published in:Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering Toxic/hazardous substances & environmental engineering, 2017-01, Vol.52 (1), p.15-22
Main Authors: Tsiridis, Vasilios, Petala, Maria, Koukiotis, Chris, Darakas, Efthymios
Format: Article
Language:English
Subjects:
Aliivibrio fischeri - drug effects
Aluminum
Aluminum oxide
Aluminum Oxide - toxicity
Aquatic life
Bacteria
Bacterial proteins
Dispersion
Engineered nanomaterials
Handling
Hydrophobic and Hydrophilic Interactions
Metal Nanoparticles - toxicity
microtox
Nanomaterials
nanomaterials toxicity
Nanostructure
Salinity
Toxicity
Toxicity Tests - methods
Vibrio
Vibrio fischeri
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Summary:The complex nature and behavior of Engineered Nanomaterials (ENMs) has led to adoption of customized experimental ecotoxicity practices that are prone to possible artefacts in the inherent toxic properties of ENMs. In addition, the lack of standardized handling procedures for the ecotoxicity testing of ENMs prevents the development of experimental protocols for regulatory purposes. In this study, a suite of techniques for dispersion of ENMs was adopted and tested for two types of surface-modified alumina nanoparticles-one hydrophobic and one hydrophilic-towards the bacteria, Vibrio fischeri. The effect of certain handling practices on the observed ecotoxic effects on V. fischeri was examined. The overall goal was to evaluate by what means the handling practices of ENMs may affect the obtained toxicity results. It was realized that the toxicity of the hydrophilic and hydrophobic ENMs was mainly affected by the centrifugation and the salinity of the tested dispersions, respectively. It is more likely that both aluminium and coating substance contributed to the overall toxicity. Toxicity results are discussed with regard to generic physicochemical characteristics of the dispersions.
ISSN:1093-4529
1532-4117
DOI:10.1080/10934529.2016.1221217