| Assessment of the physico-chemical behavior of titanium dioxide nanoparticles in aquatic environments using multi-dimensional parameter testing. | |
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MedLine Citation:
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PMID: 20724049 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Assessment of the behavior and fate of engineered nanoparticles (ENPs) in natural aquatic media is crucial for the identification of environmentally critical properties of the ENPs. Here we present a methodology for testing the dispersion stability, ζ-potential and particle size of engineered nanoparticles as a function of pH and water composition. The results obtained from already widely used titanium dioxide nanoparticles (Evonik P25 and Hombikat UV-100) serve as a proof-of-concept for the proposed testing scheme. In most cases the behavior of the particles in the tested settings follows the expectations derived from classical DLVO theory for metal oxide particles with variable charge and an isoelectric point at around pH 5, but deviations also occur. Regardless of a 5-fold difference in BET specific surface area particles composed of the same core material behave in an overall comparable manner. The presented methodology can act as a basis for the development of standardised methods for comparing the behavior of different nanoparticles within aquatic systems. |
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Authors:
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Frank von der Kammer; Stephanie Ottofuelling; Thilo Hofmann |
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Publication Detail:
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Type: Journal Article Date: 2010-08-17 |
Journal Detail:
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Title: Environmental pollution (Barking, Essex : 1987) Volume: 158 ISSN: 1873-6424 ISO Abbreviation: Environ. Pollut. Publication Date: 2010 Dec |
Date Detail:
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Created Date: 2010-10-04 Completed Date: 2011-01-11 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8804476 Medline TA: Environ Pollut Country: England |
Other Details:
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Languages: eng Pagination: 3472-81 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 Elsevier Ltd. All rights reserved. |
Affiliation:
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Department of Environmental Geosciences, University of Vienna, Althanstrasse 14, Vienna 1090, Austria. frank.kammer@univie.ac.at |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Environmental Monitoring
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standards* Hydrogen-Ion Concentration Nanoparticles / adverse effects, chemistry* Particle Size Titanium / chemistry* Water Pollutants, Chemical / analysis*, chemistry, toxicity |
| Chemical | |
Reg. No./Substance:
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0/Water Pollutants, Chemical; 13463-67-7/titanium dioxide; 7440-32-6/Titanium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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