Fig. 1. The sorption isotherms determined for simazine (a, c, e) and diuron (b, d, f)
on three soils (indicated on the plots) are shown as the sorbed concentrations
(mg kg1) plotted against the equilibrium solution concentrations (mg L1). The
black-filled and empty diamonds depict the OMW-affected (treated) and control
soil samples, respectively. The error bars represent standard deviations. The curves
were obtained by fitting the experimental isotherms to the sorption models (as
described in more detail in the text). The specific model used for a given system is
indicated in Table 2