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Transport of silver nanoparticles in single fractured sandstone.

Authors :
Neukum, Christoph
Source :
Journal of Contaminant Hydrology. Feb2018, Vol. 209, p61-67. 7p.
Publication Year :
2018

Abstract

Silver nanoparticles (Ag-NP) are used in various consumer products and are one of the most prevalent metallic nanoparticle in commodities and are released into the environment. Transport behavior of Ag-NP in groundwater is one important aspect for the assessment of environmental impact and protection of drinking water resources in particular. Ag-NP transport processes in saturated single-fractured sandstones using triaxial flow cell experiments with different kind of sandstones is investigated. Ag-NP concentration and size are analyzed using flow field-flow fractionation and coupled SEM-EDX analysis. Results indicate that Ag-NP are more mobile and show generally lower attachment on rock surface compared to experiments in undisturbed sandstone matrix and partially fractured sandstones. Ag-NP transport is controlled by the characteristics of matrix porosity, time depending blocking of attachment sites and solute chemistry. Where Ag-NP attachment occur, it is heterogeneously distributed on the fracture surface. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
01697722
Volume :
209
Database :
Academic Search Index
Journal :
Journal of Contaminant Hydrology
Publication Type :
Academic Journal
Accession number :
127814843
Full Text :
https://doi.org/10.1016/j.jconhyd.2018.01.007