Two study regions were selected one

For the log Koc determination, the preparation procedures of the test solutions KU57788 as follows: DEs were added to distilled water with 0.01 M CaCl2, 0.05% HgCl2 as a biocide, and methanol as the cosolvent (the volume fraction of methanol in aqueous solutions applied to the soils was less than 0.1%). The mixtures were treated in an ultrasonic bath for 30 min, mixed with a vortex mixer for 2 h and filtered through a membrane (0.45 μm).