Papers by Rosemarie Potocky
Vadose Zone Journal, 2004
Wan and Wilson (1994a), colloid transport experiments with porous media have been based on mass b... more Wan and Wilson (1994a), colloid transport experiments with porous media have been based on mass balance In unsaturated porous media, sorption of colloids at the air-water of breakthrough colloid concentrations in packed-sand (AW) interface is accepted as a mechanism for controlling colloid retention and mobilization. However, limited actual pore-scale obser-columns (Wan and Wilson, 1994b; Schafer et al., 1998; vations of colloid attachment to the AW interface have been made. To
Unsaturated soils are considered excellent filters for preventing the transport of pathogenic bio... more Unsaturated soils are considered excellent filters for preventing the transport of pathogenic biocolloids to groundwater, but little is known about the actual mechanisms of biocolloid retention. To obtain a better understanding of these processes, a number of visualization experiments were performed, which are briefly described here.
Biologia, 2006
Unsaturated soils are considered excellent filters for preventing the transport of pathogenic bio... more Unsaturated soils are considered excellent filters for preventing the transport of pathogenic biocolloids to groundwater, but little is known about the actual mechanisms of biocolloid retention. To obtain a better understanding of these processes, a number of visualization experiments were performed and analyzed.
Vadose Zone Journal, 2004
, colloid transport experiments with porous media have been based on mass balance In unsaturated ... more , colloid transport experiments with porous media have been based on mass balance In unsaturated porous media, sorption of colloids at the air-water of breakthrough colloid concentrations in packed-sand (AW) interface is accepted as a mechanism for controlling colloid retention and mobilization. However, limited actual pore-scale obser-columns (Wan and vations of colloid attachment to the AW interface have been made. To Jewett et al., 1999; Jin et al., 2000; Lenhart and Saiers, further investigate these processes, a real-time pore-scale visualization 2002). On the basis of analyses of outflow concentrations method was developed. The method builds on the light transmission of colloid particles, these authors found that more partitechnique for fingered flow studies in packed-sand infiltration chamcles were retained in the column at lower water contents bers and combines it with high-resolution, electro-optical hardware (or under conditions where there were higher percentand public domain imaging software. Infiltration and drainage of ages of trapped air). Retention, measured as reduced suspensions of hydrophilic negatively charged carboxylated latex micolloid concentrations in the column outflow, was attribcrospheres provides compelling visual evidence that colloid retention uted to sorption at the AW interface and film straining. in sandy porous media occurs via trapping in the thin film of water In one case retention of bacteriophages in a batch syswhere the AW interface and the solid interface meet, the air-watersolid (AWS) interface. With this modified theory of trapped colloids sity,
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Papers by Rosemarie Potocky