Title
The uptake of ZnO and CuO nanoparticles in the water-flea **Daphnia magna** under acute exposure scenarios The uptake of ZnO and CuO nanoparticles in the water-flea **Daphnia magna** under acute exposure scenarios
Author
Faculty/Department
Faculty of Sciences. Biology
Faculty of Sciences. Physics
Faculty of Pharmaceutical, Biomedical and Veterinary Sciences. Veterinary Sciences
Publication type
article
Publication
London ,
Subject
Physics
Chemistry
Biology
Veterinary medicine
Source (journal)
Environmental pollution. - London
Volume/pages
194(2014) , p. 130-137
ISSN
0269-7491
ISI
000342530800016
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
In this study the uptake of ZnO and CuO nanoparticles by Daphnia magna was tested. Daphnids were exposed during 48 h to acute concentrations of the nanoparticles and corresponding metal salts. The Daphnia zinc and copper concentration was measured and the nanoparticles were localized using electron microscopy. The aggregation and dissolution in the medium was characterized. A fast dissolution of ZnO in the medium was observed, while most CuO formed large aggregates and only a small fraction dissolved. The Daphnia zinc concentration was comparable for the nanoparticles and salts. Contrarily, a much higher Daphnia copper concentration was observed in the CuO exposure, compared to the copper salt. CuO nanoparticles adsorbed onto the carapace and occurred in the gut but did not internalize in the tissues. The combined dissolution and uptake results indicate that the toxicity of both nanoparticle types was caused by metal ions dissolved from the particles in the medium.
E-info
https://repository.uantwerpen.be/docman/iruaauth/c465bf/fe3ad5b6200.pdf
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