| Stability and aggregation of metal oxide nanoparticles in natural aqueous matrices. | |
| | |
MedLine Citation:
|
PMID: 20151631 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
|
There is a pressing need for information on the mobility of nanoparticles in the complex aqueous matrices found in realistic environmental conditions. We dispersed three different metal oxide nanoparticles (TiO(2), ZnO and CeO(2)) in samples taken from eight different aqueous media associated with seawater, lagoon, river, and groundwater, and measured their electrophoretic mobility, state of aggregation, and rate of sedimentation. The electrophoretic mobility of the particles in a given aqueous media was dominated by the presence of natural organic matter (NOM) and ionic strength, and independent of pH. NOM adsorbed onto these nanoparticles significantly reduces their aggregation, stabilizing them under many conditions. The transition from reaction to diffusion limited aggregation occurs at an electrophoretic mobility from around -2 to -0.8 microm s(-1) V(-1) cm. These results are key for designing and interpreting nanoparticle ecotoxicity studies in various environmental conditions. |
| | |
Authors:
|
Arturo A Keller; Hongtao Wang; Dongxu Zhou; Hunter S Lenihan; Gary Cherr; Bradley J Cardinale; Robert Miller; Zhaoxia Ji |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
|
Title: Environmental science & technology Volume: 44 ISSN: 0013-936X ISO Abbreviation: Environ. Sci. Technol. Publication Date: 2010 Mar |
Date Detail:
|
Created Date: 2010-03-11 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0213155 Medline TA: Environ Sci Technol Country: United States |
Other Details:
|
Languages: eng Pagination: 1962-7 Citation Subset: IM |
Affiliation:
|
University of California, Santa Barbara, USA. keller@bren.ucsb.edu |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Propranolol and D-cycloserine as adjunctive medications in reducing dental fear in sedation practice...
Next Document: Simulation of UV photoreactor for degradation of chemical contaminants: model development and evalua...