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

Authors :: Tourinho PS
van Gestel CA
Jurkschat K
Soares AM
Loureiro S
Source :: Environmental pollution (Barking, Essex : 1987) [Environ Pollut] 2015 Oct; Vol. 205, pp. 170-7. Date of Electronic Publication: 2015 Jun 10.
Publication Year :: 2015
Abstract: 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.<br /> (Copyright © 2015 Elsevier Ltd. All rights reserved.)

Subjects :: Animals
Isopoda growth & development
Isopoda metabolism
Metal Nanoparticles analysis
Silver analysis
Silver metabolism
Silver Nitrate analysis
Silver Nitrate metabolism
Soil Pollutants analysis
Soil Pollutants metabolism
Isopoda drug effects
Metal Nanoparticles toxicity
Silver toxicity
Silver Nitrate toxicity
Soil chemistry
Soil Pollutants toxicity

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