Fate of ZnO nanoparticles in soils and cowpea (Vigna unguiculata)

Wang, Peng, Menzies, Neal W., Lombi, Enzo, McKenna, Brigid A., Johannessen, Bernt, Glover, Chris J., Kappen, Peter and Kopittke, Peter M. (2013) Fate of ZnO nanoparticles in soils and cowpea (Vigna unguiculata). Environmental Science and Technology, 47 23: 13822-13830. doi:10.1021/es403466p

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Author Wang, Peng
Menzies, Neal W.
Lombi, Enzo
McKenna, Brigid A.
Johannessen, Bernt
Glover, Chris J.
Kappen, Peter
Kopittke, Peter M.
Title Fate of ZnO nanoparticles in soils and cowpea (Vigna unguiculata)
Formatted title
Fate of ZnO nanoparticles in soils and cowpea (Vigna unguiculata)
Journal name Environmental Science and Technology   Check publisher's open access policy
ISSN 0013-936X
Publication date 2013-12-02
Year available 2013
Sub-type Article (original research)
DOI 10.1021/es403466p
Open Access Status File (Author Post-print)
Volume 47
Issue 23
Start page 13822
End page 13830
Total pages 9
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Subject 1600 Chemistry
2304 Environmental Chemistry
Formatted abstract
The increasing use of zinc oxide nanoparticles (ZnO-NPs) in various commercial products is prompting detailed investigation regarding the fate of these materials in the environment. There is, however, a lack of information comparing the transformation of ZnO-NPs with soluble Zn2+ in both soils and plants. Synchrotron-based techniques were used to examine the uptake and transformation of Zn in various tissues of cowpea (Vigna unguiculata (L.) Walp.) exposed to ZnO-NPs or ZnCl2 following growth in either solution or soil culture. In solution culture, soluble Zn (ZnCl2) was more toxic than the ZnO-NPs, although there was substantial accumulation of ZnO-NPs on the root surface. When grown in soil, however, there was no significant difference in plant growth and accumulation or speciation of Zn between soluble Zn and ZnO-NP treatments, indicating that the added ZnO-NPs underwent rapid dissolution following their entry into the soil. This was confirmed by an incubation experiment with two soils, in which ZnO-NPs could not be detected after incubation for 1 h. The speciation of Zn was similar in shoot tissues for both soluble Zn and ZnO-NPs treatments and no upward translocation of ZnO-NPs from roots to shoots was observed in either solution or soil culture. Under the current experimental conditions, the similarity in uptake and toxicity of Zn from ZnO-NPs and soluble Zn in soils indicates that the ZnO-NPs used in this study did not constitute nanospecific risks.
Keyword Zinc-oxide nanoparticles
X-ray absorption
Hyperaccumulator arabidopsis-halleri
Manufactured nanomaterials
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Agriculture and Food Sciences
Official 2014 Collection
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Citation counts: TR Web of Science Citation Count  Cited 48 times in Thomson Reuters Web of Science Article | Citations
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Created: Tue, 31 Dec 2013, 10:45:40 EST by System User on behalf of School of Agriculture and Food Sciences