Dual-continuum analysis of a cadmium tracer field experiment.
Cadmium penetration into a sandy-loam soil during the field ponded infiltration at Kralovska luka site in Southern Slovakia was observed in a controlled experiment. Adsorption of cadmium was examined using the radioactive tracer techniques in laboratory batch tests. Quite deep (115m)Cd penetration during the field experiment (65 cm beneath the soil surface) gives evidence of the particle-facilitated transport of cadmium through preferential pathways. More than 40% of the applied cadmium moved deeper than 10 cm. The field experiment was analyzed using both conventional single-continuum approach (based on Richards' equation for water flow and advection-dispersion equation for Cd transport) and dual-continuum approach. The latter approach allowed us to simulate more adequately the observed movement of cadmium.
Vogel
Tomas
T
Czech Technical University, Faculty of Civil Engineering, Thakurova 7, 16629 Prague, Czech Republic. vogel@fsv.cvut.cz
Lichner
Lubomir
L
Dusek
Jaromir
J
Cipakova
Andrea
A
D000327:Adsorption; D002104:Cadmium / Q000737:chemistry*; D003198:Computer Simulation; D008962:Models, Theoretical; D010539:Permeability; D016062:Porosity; D012987:Soil; D014872:Water Movements; D014874:Water Pollutants, Chemical / Q000737:chemistry*
D012987:Soil; D014874:Water Pollutants, Chemical; D002104:Cadmium