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Influences of Flow Transients and Porous Medium Heterogeneity on Colloid-Associated Contaminant Transport in the Vadose Zone. Annual Report.

DE2005838354

Publication Date	2005
Personal Author	Saiers, J.; Ryan, J.
Page Count	8
Abstract	We are investigating the role of colloids in the movement of radionuclides through water unsaturated porous media. This research is guided by a key objective of the Environmental Management Science Program (EMSP), which is to improve conceptual and predictive models for contaminant movement in complex vadose zone environments. In the report entitled National Roadmap for Vadose Zone Science and Technology (DOE, 2001), increases in the understanding of colloid-contaminant interactions, colloid mobilization, and colloid deposition within unsaturated soils are cited as requisite needs for predicting contaminant fate and distribution in the vadose zone. We seek to address these needs by pursuing three overarching goals: (1) identify the mechanisms that govern colloid mobilization, transport, and deposition within unsaturated porous media; (2) quantify the role of colloids in scavenging and facilitating the transport of radionuclides; and (3) develop and test a mathematical model suitable for simulating the movement of colloid associated radionuclides through variably saturated porous media.
Keywords	Colloids Radionuclides Chemistry Kinetics Sediments Soils Tanks Wastes Mathematical models Scavenging Deposition Distribution Water saturation Radioisotopes Vadose Zone Colloid-facilitated transport
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Yale Univ., New Haven, CT.; Colorado State Univ., Fort Collins.; Department of Energy, Washington, DC.
Supplemental Notes	Prepared in cooperation with Colorado State Univ., Fort Collins. Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200520

Influences of Flow Transients and Porous Medium Heterogeneity on Colloid-Associated Contaminant Transport in the Vadose Zone. Annual Report.

Influences of Flow Transients and Porous Medium Heterogeneity on Colloid-Associated Contaminant Transport in the Vadose Zone. Annual Report.
DE2005838354

Publication Date	2005
Personal Author	Saiers, J.; Ryan, J.
Page Count	8
Abstract	We are investigating the role of colloids in the movement of radionuclides through water unsaturated porous media. This research is guided by a key objective of the Environmental Management Science Program (EMSP), which is to improve conceptual and predictive models for contaminant movement in complex vadose zone environments. In the report entitled National Roadmap for Vadose Zone Science and Technology (DOE, 2001), increases in the understanding of colloid-contaminant interactions, colloid mobilization, and colloid deposition within unsaturated soils are cited as requisite needs for predicting contaminant fate and distribution in the vadose zone. We seek to address these needs by pursuing three overarching goals: (1) identify the mechanisms that govern colloid mobilization, transport, and deposition within unsaturated porous media; (2) quantify the role of colloids in scavenging and facilitating the transport of radionuclides; and (3) develop and test a mathematical model suitable for simulating the movement of colloid associated radionuclides through variably saturated porous media.
Keywords	Colloids Radionuclides Chemistry Kinetics Sediments Soils Tanks Wastes Mathematical models Scavenging Deposition Distribution Water saturation Radioisotopes Vadose Zone Colloid-facilitated transport
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Yale Univ., New Haven, CT.; Colorado State Univ., Fort Collins.; Department of Energy, Washington, DC.
Supplemental Notes	Prepared in cooperation with Colorado State Univ., Fort Collins. Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200520