A negative correlationn was observed between Kd and pH indicating the enhanced extent of FBNZ adsorption in soil sample with lowering pH.
The desorption isotherm of FBNZ adsorbed on all tested soil samples yielded straight lines that resemble to C-type isotherm shape (Fig.
Desorption isotherms of the FBNZ from soil samples also fit the Freundlich equation (Fig.
6: Freundlich isotherm of FBNZ desorption on studied soils
Table-2: Adsorption Coefficients of FBNZ and their test statistics on four Pakistani soils
The amount of the FBNZ adsorbed (g/g soil) was calculated by using Equation (1) .