NDLI: Dissolved cerium contributes to uptake of Ce in the presence of differently sized CeO<sub>2</sub>-nanoparticles by three crop plants

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Back cover

Metallomics Vol - 7 Issue - 2

Dissolved cerium contributes to uptake of Ce in the presence of differently sized CeO₂-nanoparticles by three crop plants

Content Provider	Royal Society of Chemistry (RSC)
Author	Schwabe, Franziska Stark, Wendelin Rotzetter, Aline Quadt, Albrecht Nowack, Bernd Tanner, Simon Schulin, Rainer
Copyright Year	2015
Abstract	We investigated the uptake of cerium (Ce) dioxide nanoparticles (NPs) by hydroponically grown wheat, pumpkin and sunflower plants. The presence of plant roots in nutrient solution led to a substantial increase in the dissolution of CeO2-NP compared to plant-free medium. Experiments with Zr/CeOx-NP revealed that Ce was not only taken up in the form of NPs, but simultaneously to a significant degree also as dissolved Ce(III) ions, which then re-precipitated in the form of CeO2-NPs inside the leaves. The contribution of dissolved Ce uptake was particularly large for particles smaller than 10 nm due to their higher dissolution rate. Our data also indicate that the translocation of Ce resulting from NP-root-exposure is species dependent. When Ce was supplied as dissolved ions, sunflower had the highest capacity of Ce-ion accumulation inside the leaves, while there was no significant difference between pumpkin and wheat. We found no Ce translocation from roots into shoots when only NPs bigger than 20 nm were applied. This study highlights that plant root activity can have a significant impact on the dissolution of CeO2-NPs in soil solution and that uptake of dissolved Ce(III) followed by re-precipitation needs to be considered as an important pathway in studies of CeO2-NP uptake by plants.
Starting Page	466
Ending Page	477
Page Count	12
File Format	HTM / HTML PDF
ISSN	17565901
Volume Number	7
Issue Number	3
Journal	Metallomics
DOI	10.1039/c4mt00343h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Ce Zirconium Helianthus Cerium
Content Type	Text
Resource Type	Article
Subject	Chemistry Medicine Metals and Alloys Biochemistry Biomaterials Biophysics

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