Fig. 10. Influence of (a) time and (b) effluent volume on second phase leaching of imazaquin from soil as described by Elovich kinetics. Initial imazaquin–soil concentration was 17.8 µmol kg^–1. All treatments were incubated for 72 h before desorption. Regression slopes are different at a 0.05 level of significance when indicated by ^a or ^b.