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

This Article Abstract Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (10) Citing Articles via Google Scholar Google Scholar Articles by Selim, H.M. Articles by Zhu, H. Search for Related Content PubMed Articles by Selim, H.M. Articles by Zhu, H. GeoRef GeoRef Citation Agricola Articles by Selim, H.M. Articles by Zhu, H.

Predicting Solute Transport in Soils

Second-Order Two-Site Models

^a Agronomy Dep., Louisiana State Univ., Baton Rouge, LA, 70803 USA

View larger version (34K): [in a new window]   Fig. 1 Metolachlor concentrations in soil solution vs. reaction time. Symbols are for different initial concentrations (Ci) of 5, 10, 20, 40, 60, 80, and 100 µg mL-1 (from bottom to top). Solid curves are simulations using both adsorption and desorption batch data sets, and dashed curves are simulations using adsorption data sets only

View larger version (27K): [in a new window]   Fig. 2 Metolachlor adsorption (solid symbols) at reaction times of 504 h and desorption isotherms (open circles). Solid and dashed curves are simulations based on the modified second-order two-site (SOTS) model

View larger version (35K): [in a new window]   Fig. 3 Predicted metolachlor breakthrough curves (BTCs) for soil column No. I-1 (<2-mm aggregates) using the original (top) and modified (bottom) second-order two-site (SOTS) models. Model parameters were based on adsorption (ad) or adsorption–desorption (ad–des) batch data sets

View larger version (37K): [in a new window]   Fig. 4 Predicted metolachlor breakthrough curves (BTC)s for soil column no. I-2 (<2-mm aggregates), with flow interruption using the original (top) and modified (bottom) second-order two-site (SOTS) models. Model parameters were based on adsorption (ad) or adsorption–desorption (ad–des) batch data sets

View larger version (35K): [in a new window]   Fig. 5 Predicted metolachlor breakthrough curves (BTC)s for soil column no. II-1 (2–4 mm aggregates) using the original (top) and modified (bottom) second-order two-site (SOTS) models. Model parameters were based on adsorption (ad) or adsorption–desorption (ad–des) batch data sets

View larger version (37K): [in a new window]   Fig. 6 Predicted metolachlor breakthrough curves (BTC)s for soil column no. II-2 (2–4 mm aggregates) with flow interruption, using the original (top) and modified (bottom) second-order two-site (SOTS) models. Model parameters were based on adsorption (ad) or adsorption–desorption (ad–des) batch data sets

View larger version (34K): [in a new window]   Fig. 7 Predicted metolachlor breakthrough curves (BTC)s for soil column no. III-1 (4–6 mm aggregates) using the original (top) and modified (bottom) second-order two-site (SOTS) models. Model parameters were based on adsorption (ad) or adsorption–desorption (ad–des) batch data sets

View larger version (36K): [in a new window]   Fig. 8 Predicted metolachlor breakthrough curves (BTC)s for soil column III-2 (4–6 mm aggregates), with flow interruption, using the original (top) and modified (bottom) second-order two-site (SOTS) models. Model parameters were based on adsorption (ad) or adsorption–desorption (ad–des) batch data sets