HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Abstract Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Related articles in JEQ Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Selim, H. M. Articles by Clarke, N. Search for Related Content PubMed PubMed Citation Articles by Selim, H. M. Articles by Clarke, N. GeoRef GeoRef Citation Agricola Articles by Selim, H. M. Articles by Clarke, N. Related Collections Fate Ecosystem Management

Mobility of Sulfate in Forest Soils

Kinetic Modeling

^a Agronomy and Environmental Management Dep., Sturgis Hall, Louisiana State Univ., Baton Rouge, LA 70803
^b Dep. of Ecology and Environmental Research, Swedish Univ. of Agric. Sciences, Uppsala, Sweden
^c Norwegian Forest Research Inst., Høgskoleveien, Norway

View larger version (18K): [in a new window]   Fig. 1. A schematic of the multireaction model for solute reactivity in soils.

View larger version (26K): [in a new window]   Fig. 2. A schematic of the sequential leaching experiment through 5-cm soil columns from the E, Bs, and BC horizons (FF = forest floor).

View larger version (19K): [in a new window]   Fig. 3. Experimental and simulated breakthrough results of SO4 effluent concentrations vs. pore volume (BTCs) from the E horizon [column E-I, input SO4 (Co) of 0.005 M]. The simulation is based on best-fit of the data when a linear equilibrium sorption model was assumed.

View larger version (24K): [in a new window]   Fig. 4. Experimental and simulated (solid and dashed curves) BTCs of SO4 effluent concentrations from the Bs horizon [column Bs-I, input SO4 (Co) of 0.005 M]. Simulations are for a range of Kd values where a linear equilibrium sorption model was assumed.

View larger version (24K): [in a new window]   Fig. 5. Experimental and simulated (solid and dashed curves) BTCs of SO4 effluent concentrations from the Bs horizon [column Bs-I, input SO4 (Co) of 0.005 M]. Simulations are for a range of n values where a nonlinear equilibrium model was assumed.

View larger version (22K): [in a new window]   Fig. 6. Experimental and simulated BTCs of SO4 effluent concentrations from the Bs horizon [column Bs-I, input SO4 (Co) of 0.005 M]. Simulations are based on best-fit of the data when a linear equilibrium model (dashed curve) and a nonlinear equilibrium (solid curve) were used.

View larger version (22K): [in a new window]   Fig. 7. Experimental and simulated BTCs of SO4 effluent concentrations from the Bs horizon [column Bs-I, input SO4 (Co) of 0.005 M]. Simulations are based on best-fit of the data when a kinetic model (dashed curve) and kinetic model with an irreversible reaction (solid curve) were used.

View larger version (24K): [in a new window]   Fig. 8. Experimental and simulated BTCs of SO4 effluent concentrations from the Bs horizon [column Bs-II, input SO4 (Co) of 0.0005 M]. Simulations are based on best-fit of the data when a linear equilibrium model (dotted curve) and kinetic model (dashed curve) were used. The solid curve is a prediction based on the kinetic model.

View larger version (24K): [in a new window]   Fig. 9. Experimental and simulated BTCs of SO4 effluent concentrations from the BC horizon [column BC-I, input SO4 (Co) of 0.005 M]. Simulations are based on best-fit of the data when linear equilibrium (dotted curve), nonlinear equilibrium (dashed curve), and kinetic models (solid curve) were used.

View larger version (21K): [in a new window]   Fig. 10. Experimental and simulated BTCs of SO4 effluent concentrations from the BC horizon [column BC-II, input SO4 (Co) of 0.0005 M]. Calculations are based on the linear equilibrium model in a curve-fitting mode (solid curve) and prediction mode (dashed curve).

View larger version (21K): [in a new window]   Fig. 11. Experimental and simulated BTCs of SO4 effluent concentrations from the BC horizon [column BC-II, input SO4 (Co) of 0.0005 M]. Calculations are based on the kinetic model in a curve-fitting mode (solid curve) and prediction mode (dashed curve).