| Evidence for bioavailability of Au nanoparticles from soil and biodistribution within earthworms (Eisenia fetida). | |
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MedLine Citation:
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PMID: 20879765 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Because Au nanoparticles (NPs) are resistant to oxidative dissolution and are easily detected, they have been used as stable probes for the behavior of nanomaterials within biological systems. Previous studies provide somewhat limited evidence for bioavailability of Au NPs in food webs, because the spatial distribution within tissues and the speciation of Au was not determined. In this study, we provide multiple lines of evidence, including orthogonal microspectroscopic techniques, as well as evidence from biological responses, that Au NPs are bioavailable from soil to a model detritivore (Eisenia fetida). We also present limited evidence that Au NPs may cause adverse effects on earthworm reproduction. This is perhaps the first study to demonstrate that Au NPs can be taken up by detritivores from soil and distributed among tissues. We found that primary particle size (20 or 55 nm) did not consistently influence accumulated concentrations on a mass concentration basis; however, on a particle number basis the 20 nm particles were more bioavailable. Differences in bioavailability between the treatments may have been explained by aggregation behavior in pore water. The results suggest that nanoparticles present in soil from activities such as biosolids application have the potential to enter terrestrial food webs. |
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Authors:
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Jason M Unrine; Simona E Hunyadi; Olga V Tsyusko; William Rao; W Aaron Shoults-Wilson; Paul M Bertsch |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Environmental science & technology Volume: 44 ISSN: 1520-5851 ISO Abbreviation: Environ. Sci. Technol. Publication Date: 2010 Nov |
Date Detail:
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Created Date: 2010-10-29 Completed Date: 2011-01-27 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0213155 Medline TA: Environ Sci Technol Country: United States |
Other Details:
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Languages: eng Pagination: 8308-13 Citation Subset: IM |
Affiliation:
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Department of Plant and Soil Science, Tracy Farmer Institute for Sustainability and the Environment, University of Kentucky, Lexington, Kentucky 40546, USA. jason.unrine@uky.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Biological Availability Environmental Monitoring Gold / metabolism*, toxicity Metal Nanoparticles / analysis*, toxicity Metallothionein / genetics, metabolism Oligochaeta / genetics, growth & development, metabolism* Particle Size Reproduction Soil Pollutants / metabolism*, toxicity |
| Chemical | |
Reg. No./Substance:
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0/Soil Pollutants; 7440-57-5/Gold; 9038-94-2/Metallothionein |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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