Aq. soln. of a corn. pesticide (acetamipiride) was treated with dusty activated C or clinoptylolite, Al-2(SO4)(3) or Fe Cl-3, and, optionally, with a corn. polyelectrolyte at 15 degrees C and pH 5-10 under stirring in lab. stand. The solid sorbents were added before, after or simultaneously with addn. of the coagulants. The effectiveness of the coagulation was low. The addn. of activated C (0.07 g/L) 5 min before the coagulation with FeCl3, resulted in a decrease in pesticide content from 5 mg/L down to 0.2 mg/L.