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Transport of PVP-coated Silver Nanoparticles in Saturated Porous Media
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 Title & Authors
Transport of PVP-coated Silver Nanoparticles in Saturated Porous Media
Bae, Sujin; Jang, Min-Hee; Lee, Woo Chun; Park, Jae-Woo; Hwang, Yu Sik;
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The transport of silver nanoparticles (AgNPs) was investigated through a column packed with sand. A series of column experiments were carried out to evaluate the effect of ionic strength (IS), pH, electrolyte type and clay mineral on mobility of polyvinylpyrrolidone-coated silver nanoparticles (PVP-AgNPs). The deposition of PVP-AgNPs was increased with increasing solution ionic strength and decreasing pH. Furthermore, the depositon of PVP-AgNPs was affected by the electrolyte type (NaCl vs. NaNO3) and was shown to be greater at NaNO3 solution. Also, the transport of PVP-AgNPs was greatly increased after the pre-deposition of clay particles on sand. Our results suggest that various environmental factors can influence the mobility of PVP-AgNPs in soil-groundwater systems and should be carefully considered in assessing their environmental risks.
Silver nanoparticles;Transport;Ionic strength;pH;Clay;
 Cited by
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