fs09 p3t6 mercury transport parameters last update02.10.09
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8/8/2019 FS09 P3T6 Mercury Transport Parameters Last Update02.10.09
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Client: U.S. Department of Energy Last revision date: February 20, 2009 Project Duration: March 2008 February 2009
ARC Contact: Georgio Tachiev, [email protected], (305) 348-6732 FLORIDA INTERNATIONAL UNIVERSITY
FLORIDA INTERNATIONAL UNIVERSITY
APPLIED RESEARCH CENTER
PROJECT FACT SHEET
Transport Behavior of Mercury (II) in Oak Ridge Reservation Soil
The Applied Research Center at Florida International University (ARC-FIU) is assisting the U.S. Department of Energys(DOE) Oak Ridge Reservation (ORR) in developing solutions to mercury contamination in soil, sediment and water, includingthe incorporation of emerging technologies for the efficient management of mercury-contaminated materials. This taskfocused on laboratory tests to determine mercury transport parameters and adsorption/desorption (Kd
) coefficients in ORRsoil to support complex watershed model development via the use of experimentally determined input values.
Project Objectives
Conduct characterization of soil to be used in thebatch and soil experiments.
Determine mercury sorption/desorption parameters inbatch tests. Evaluate the effect of temperature on Hg(II) adsorption.
Determine axial dispersion parameters from soilcolumn tracer tests. Determine Peclets number andqualify the dispersion (large, intermediate, low).
Conduct column flow-through experiments todetermine the dispersion and retardation factors.
Conduct flow-through sorption experiments todetermine the sorption capacity of the soil and theretardation coefficient.
Determine mercury leachability to assess possibleimpact on aquifer by using extraction fluids with pH2.9 and 4.9 used in EPA method 1311 ToxicityCharacteristic Leaching Procedures (TCLP).
Conduct modeling of contaminant transport underconstant flow conditions using Comsol multiphysicssoftware supported by measurements obtained fromthe experimental study.
Project Benefits
Simulation of Hg movement by advection, diffusion,dispersion and retardation by sorption. Betterunderstanding of the transport factors affectingmercury mobility for more accurate estimates of fateand transport in the ORR hydrologic system.
Use of actual mercury contaminated material fromORR, thus providing site-specific input values whichenhance the models accuracy and applicability.
Project Accomplishments
Determined mercury transport parameters to betterunderstand factors affecting mercury mobility in ORRcontaminated soil.
Simulated contaminant transport under constant flowconditions using measurements obtained in batch andcolumn experiments.
Figure 1. Flow-through col umns. Figure 2. Comsol simu lations for tracer test. Figure 3. Tracer test results.