Mobility of capped silver nanoparticles under environmentally relevant conditions.
Environ Sci Technol
; 46(13): 6985-91, 2012 Jul 03.
Article
en En
| MEDLINE
| ID: mdl-22133047
ABSTRACT
The mobility and deposition of capped silver (Ag) nanoparticles (NPs) on silica surfaces were characterized over a wide range of pH and ionic strength (IS) conditions, including seawater and freshwater. Two common organic capping agents (citrate and PVP) were evaluated. Both the capped Ag NPs and the silica surfaces were negatively charged under these environmentally relevant conditions, resulting in net repulsive electrostatics under most conditions. The steric repulsion introduced by the capping agents significantly reduced aggregation and deposition. In addition, the presence of natural organic matter in solution further decreased the deposition of either Ag NP on silica. Ag NPs were found to be highly mobile under these environmentally relevant conditions, with little or no deposition.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Plata
/
Contaminantes Químicos del Agua
/
Povidona
/
Dióxido de Silicio
/
Ácido Cítrico
/
Nanopartículas
Idioma:
En
Revista:
Environ Sci Technol
Año:
2012
Tipo del documento:
Article
País de afiliación:
Estados Unidos