“…Herbicides are potential contaminants of environmental water because they are directly applied to the soil or irrigating water. Thus, they can be leached to the surface water and transported into the groundwater (Hatrík & Tekel, 1996;Zanella et al, 2002). According to specialized literature (Barceló & Hennion, 1997;Primel et al;Cabrera et al, 2008), a pesticide can pollute the aquatic environmental if its solubility in water is higher than 30 mg L -1 ; its K oc , organic carbon partition coefficient, is less than 300-500; its K H , Henry Law constant is less than 10 -2 Pa m 3 mol -1 , its soil half-life is longer than 2-3 weeks and its water half-life is longer than 25 weeks.…”