Nonequilibrium and nonlinear transport of cadmium, nickel, and strontium through subsurface soils
- Univ. of Arizona, Tucson, AZ (United States)
The sorption and transport of Cd, Ni and Sr in subsurface soils (Hayhook series and Borden soils, pH 6.0-6.4) were investigated using batch and miscible-displacement experiments. The sorption isotherms of Cd, Ni and Sr were strongly nonlinear and well described by the Freundlich equation (S=K{sub f}C{sup n}). The breakthrough curves of Cd, Ni and Sr exhibited nonideal behavior, and were analyzed by using a model that included various combinations of instantaneous, rate-limited, linear, and nonlinear sorption. Both results of simulations obtained by using a model incorporating both nonlinear and rate-limited sorption and Flow-interruption experiments indicated that nonlinear sorption was the major cause of nonideal transport, and that rate-limited sorption was a relatively minor component.
- OSTI ID:
- 370509
- Report Number(s):
- CONF-960376--
- Country of Publication:
- United States
- Language:
- English
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