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Model of contaminant transport in porous media in the presence of colloids applied to actinide migration in column experiments
Author(s) -
Lührmann L.,
Noseck U.,
Tix C.
Publication year - 1998
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/97wr03468
Subject(s) - sorption , colloid , filtration (mathematics) , actinide , groundwater , porous medium , matrix (chemical analysis) , chemistry , porosity , chromatography , geology , adsorption , geotechnical engineering , inorganic chemistry , statistics , mathematics , organic chemistry
We simulate column experiments of europium migration in humic‐rich groundwater performed with different Darcy velocities to investigate the predictive capability of colloid‐facilitated transport models for actinides. The simulation results indicate two retention mechanisms: sorption of dissolved contaminants and filtration of colloidal contaminants by the matrix. These interaction processes, which determine the breakthrough curves and their tailing behavior, are kinetically controlled. Sorption constants are derived from batch experiments. Sorption rates are obtained by the simulation and are compared with the values of the filtration rate predicted by the colloid filtration theory.