GEOC 54 |
| Jan E. Groenenberg, Luc T.C. Bonten, Paul F.A.M. Romkens, and Rene P.J.J. Rietra. Soil Centre, Alterra Wageningen UR, Droevendaalsesteeg 3, P.O. Box 47, 6708 LG Wageningen, Netherlands |
| Sample scale: We tested both the applicability of a process orientated multi-surface assemblage model and a regression model (scaled Freundlich isotherm) to describe the speciation of metals in soils for a large set of different soils using generic model parameters from literature. Results of both models compare well with measurements and have equal accuracy. Field scale: To calculate metal leaching the regression model, which requires only limited input, was coupled with a model for solute transport. The model was validated at some sites using field data. Regional scale: For use at a regional scale, all Dutch soils were clustered to 21 types with main chemical and physical properties, and combined with hydrology and land use to 6000 unique units. Metal contents were assigned to soils on basis of soil type, depth and land use. Ranges in model results compare well with available data from regional groundwater monitoring networks and metal concentrations in surface waters. |
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Colloid-Facilitated Transport of Contaminants in the Subsurface: The Life and Death of a Colloid
1:00 PM-5:20 PM, Monday, March 29, 2004 Marriott -- Marquis NW, Oral
Division of Geochemistry |