Effects of soil and dietary exposures to Ag nanoparticles and AgNO₃ in the terrestrial isopod Porcellionides pruinosus.

Autor: Tourinho PS; Department of Biology and the Centre for Environmental and Marine Studies, University of Aveiro, Aveiro, Portugal. Electronic address: paulatourinho@ua.pt., van Gestel CA; Department of Ecological Science, Faculty of Earth and Life Sciences, VU University, Amsterdam, The Netherlands., Jurkschat K; Department of Materials, Oxford University, Begbroke Science Park, Begbroke Hill, Yarnton, Oxford, OX5 1PF, United Kingdom., Soares AM; Department of Biology and the Centre for Environmental and Marine Studies, University of Aveiro, Aveiro, Portugal., Loureiro S; Department of Biology and the Centre for Environmental and Marine Studies, University of Aveiro, Aveiro, Portugal.
Jazyk: angličtina
Zdroj: Environmental pollution (Barking, Essex : 1987) [Environ Pollut] 2015 Oct; Vol. 205, pp. 170-7. Date of Electronic Publication: 2015 Jun 10.
DOI: 10.1016/j.envpol.2015.05.044
Abstrakt: The effects of Ag-NPs and AgNO3 on the isopod Porcellionides pruinosus were determined upon soil and dietary exposures. Isopods avoided Ag in soil, with EC50 values of ∼16.0 and 14.0 mg Ag/kg for Ag-NPs and AgNO3, respectively. Feeding inhibition tests in soil showed EC50s for effects on consumption ratio of 127 and 56.7 mg Ag/kg, respectively. Although similar EC50s for effects on biomass were observed for nanoparticulate and ionic Ag (114 and 120 mg Ag/kg dry soil, respectively), at higher concentrations greater biomass loss was found for AgNO3. Upon dietary exposure, AgNO3 was more toxic, with EC50 for effects on biomass change being >1500 and 233 mg Ag/kg for Ag-NPs and AgNO3, respectively. The difference in toxicity between Ag-NPs and AgNO3 could not be explained from Ag body concentrations. This suggests that the relation between toxicity and bioavailability of Ag-NPs differs from that of ionic Ag in soils.
(Copyright © 2015 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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