BBAuthors: Padilla, J.T.; Advisor: -; Participants: Selim, H.M. (2019)
Results of batch experiments indicate a high affinity of both soils for GPS, with 24‐h Freundlich coefficients of 158 and 396 Ln mg1−n kg−1 for the Commerce and Sharkey soils, respectively. An apparent time dependency of GPS sorption by both soils was observed, especially within the first 72 h. Changes in solution concentrations of the herbicide beyond 72 h are attributed to both additional sorption as well as solution‐phase degradation. A two‐site multi‐reaction model incorporating time‐dependent reversible and irreversible reactions successfully described the measured data from the batch experiments. However, values of the rate coefficients and sorbed concentrations may be overestim... 
