Transport behavior of PVP (polyvinylpyrrolidone) - AgNPs in saturated packed column: Effect of ionic strength and HA

Title & Authors
Transport behavior of PVP (polyvinylpyrrolidone) - AgNPs in saturated packed column: Effect of ionic strength and HA
Heo, Jiyong; Han, Jonghun; Her, Namguk;

Abstract
Recent Engineered nanoparticles were increasingly exposed to environmental system with the wide application and production of nanomaterials, concerns are increasing about their environmental risk to soil and groundwater system. In order to assess the transport behavior of silver nanoparticles (AgNPs), a saturated packed column experiments were examined. Inductively coupled plasma-mass spectrometry and a DLS detector was used for concentration and size measurement of AgNPs. The column experiment results showed that solution chemistry had a considerable temporal deposition of AgNPs on the porous media of solid glass beads. In column experiment, comparable mobility improvement of AgNPs were observed by changing solution chemistry conditions from salts (in both NaCl and $\small{CaCl_2}$ solutions) to DI conditions, but in much lower ionic strength (IS) with $\small{CaCl_2}$. Additionally, the fitted parameters with two-site kinetic attachment model form the experimental breakthrough curves (BTCs) were associated that the retention rates of the AgNPs aggregates were enhanced with increasing IS under both NaCl and $\small{CaCl_2}$ solutions.
Keywords
Aggregation;Column experiment;Mobility;Silver nanoparticles (AgNPs);Two-site kinetic attachment model;
Language
Korean
Cited by
References
1.
Bradford, S.A., et al. (2003) Modeling colloid attachment, straining, and exclusion in saturated porous media. Environmental Science & Technology 37(10), 2242-2250.

2.
Deshpande, P.A. and Shonnard, D.R. (1999) Modeling the effects of systematic variation in ionic strength on the attachment kinetics of Pseudomonas fluorescens UPER in saturated sand columns. Water resources research 35(5), 1619-1627.

3.
Gargiulo, G., et al. (2007) Bacteria transport and deposition under unsaturated conditions: The role of the matrix grain size and the bacteria surface protein. Journal of Contaminant Hydrology 92(3), 255-273.

4.
Kasel, D., et al. (2013) Transport and retention of multi-walled carbon nanotubes in saturated porous media: Effects of input concentration and grain size. Water Research 47(2), 933-944.

5.
Li, Y., Wang, et al. (2008) Investigation of the transport and deposition of fullerene (C60) nanoparticles in quartz sands under varying flow conditions. Environmental Science & Technology 42(19), 7174-7180.

6.
Liang, Y., et al. (2013) Retention and remobilization of stabilized silver nanoparticles in an undisturbed loamy sand soil. Environmental Science & Technology 47(21), 12229-12237.

7.
Liang, Y., et al. (2013) Sensitivity of the transport and retention of stabilized silver nanoparticles to physicochemical factors. Water Research 47(7), 2572-2582.

8.
Qi., et al. (2014) Transport of graphene oxide nanoparticles in saturated sandy soil. Environmental Science: Processes & Impacts 16(10), 2268-2277.

9.
Zhang, X., et al. (2007) Enhanced bioaccumulation of cadmium in carp in the presence of titanium dioxide nanoparticles. Chemosphere 67(1), 160-166.

10.
Zhang, L., et al. (2012) Transport of fullerene nanoparticles (n C60) in saturated sand and sandysoil: controlling factors and modeling. Environmental Science & Technology 46(13), 7230-7238.