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Partitioning of nanoparticle-originated dissolved silver in natural and artificial sediments

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Rajala, J., Vehniäinen, E.-R., Väisänen, A., & Kukkonen, J. (2017). Partitioning of nanoparticle-originated dissolved silver in natural and artificial sediments. Environmental Toxicology and Chemistry, 36(10), 2593-2601. https://doi.org/10.1002/etc.3798
Published in
Environmental Toxicology and Chemistry
Authors
Rajala, Juho |
Vehniäinen, Eeva-Riikka |
Väisänen, Ari |
Kukkonen, Jussi
Date
2017
Discipline
YmpäristötiedeEpäorgaaninen ja analyyttinen kemiaEnvironmental ScienceInorganic and Analytical Chemistry
Copyright
© 2017 SETAC. This is a final draft version of an article whose final and definitive form has been published by Wiley. Published in this repository with the kind permission of the publisher.

 
Sediments are believed to be a major sink for silver nanoparticles (AgNPs) in the aquatic environment, but there is a lack of knowledge about the environmental effects and behavior of AgNPs in sediments. The release of highly toxic Ag+ through dissolution of AgNPs is one mechanism leading to toxic effects in sediments. We applied an ultrasound-assisted sequential extraction method to evaluate the dissolution of AgNPs and to study the partitioning of dissolved Ag in sediments. Silver was spiked into artificial and 2 natural sediments (Lake Höytiäinen sediment and Lake Kuorinka sediment) as silver nitrate (AgNO3), uncoated AgNPs, or polyvinylpyrrolidone-coated AgNPs (PVP-AgNPs). In addition, the total body burdens of Ag in the sediment-dwelling oligochaete Lumbriculus variegatus were assessed over a 28-d exposure period. The dissolution rate was found to be similar between the uncoated AgNP and PVP-AgNP groups. In all sediments, dissolved Ag was mainly bound to the residual fraction of the sediment, followed by iron and manganese oxides or natural organic matter. In Lake Kuorinka sediment, dissolved Ag that originated from PVP-AgNPs was relatively more bioaccessible, also resulting in higher total body burden in L. variegatus than that from uncoated AgNPs or AgNO3. In artificial sediment and Lake Höytiäinen sediment, AgNO3 was significantly more bioaccessible than AgNPs. Our results highlight the importance of sediment properties and AgNP surface chemistry when evaluating the environmental exposure of AgNPs. ...
Publisher
John Wiley & Sons, Inc.; Society of Environmental Toxicology and Chemistry
ISSN Search the Publication Forum
0730-7268
Keywords
sediment chemistry sequential extraction nanoecotoxicology sedimentit ekotoksikologia nanohiukkaset hopea
DOI
https://doi.org/10.1002/etc.3798
URI

http://urn.fi/URN:NBN:fi:jyu-201709293882

Publication in research information system

https://converis.jyu.fi/converis/portal/detail/Publication/26918800

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  • Matemaattis-luonnontieteellinen tiedekunta [4426]
Related funder(s)
Academy of Finland
Funding program(s)
Research post as Academy Research Fellow, AoF
Additional information about funding
J.E. Rajala acknowledges support from the University of Jyväskylä Graduate School for Doctoral Studies. E.‐R. Vehniäinen was supported by the Academy of Finland (285296).

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