Effects of Silver nanoparticles in diatom Thalassiosira pseudonana and
cyanobacterium Synechococcus sp.
The aim of the present study was to investigate the effect of silver nanoparticles (AgNP)
of different sizes towards two primary producer aquatic species. Thalassiosira
pseudonana and Synechococcus sp. have been selected as representative models for the
lower trophic organisms in marine and freshwater habitats, respectively. Time-dependent
cellular growth was measured under exposure to both AgNP and silver nitrate (AgNO3).
In addition, AgNP behavior in freshwater and marine waters has been followed by CPS
disk centrifuge, in the time-frame of AgNP exposure studies, and the kinetic release of
silver from AgNP of different sizes was measured by inductively coupled plasma mass
spectrometry (ICP-MS). The combination and interpretation of all these data suggest that
a shared effect of AgNP and free silver ions (Ag+ ) was responsible for the toxicity in
both organisms, while the cyanobacteria were the most sensitive specie to both AgNP and
Ag+. Furthermore the relative contribution of Ag+ and AgNP to the measured toxicity
was dependent on the stability of the preparation.
BURCHARDT Alina;
NEGRÃO DE CARVALHO Raquel;
VALENTE Angelica;
NATIVO Paola;
GILLILAND Douglas;
PASCUAL GARCIA Cesar;
PASSARELLA Rosanna;
PEDRONI Valerio;
ROSSI Francois;
LETTIERI Teresa;
2012-11-06
AMER CHEMICAL SOC
JRC69659
0013-936X,
http://pubs.acs.org/doi/pdf/10.1021/es300989e,
https://publications.jrc.ec.europa.eu/repository/handle/JRC69659,
10.1021/es300989e.,
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