The sorption of linuron on bentonite desiccated at 110ÄC untreated, and acid-treated with solutions over a concentration range between 0.25 M and 1.00 M from aqueous solution at 25ÄC H 2 SO 4 has been studied by using batch experiments. In addition, column experiments were carried out with the bentonite sample treated with the 1.00 M solution [ B-A(1.00) ] by using two aqueous solu-H 2 SO 4 tions of linuron of diþ erent concentrations (C = 4.97 mg dm-3 and C = 7.63 mg dm-3). The experimental data points have been ütted to the Langmuir equation in order to calculate the sorption capacities of the samples ; values range from 0.02 g kg-1 for the untreated bentonite [ B-N ] up to (X m ) X m 0.20 g kg-1 for the sample acid-treated with the 1.00 M solution. The removal efficiency (R) has H 2 SO 4 also been calculated ; R values ranging from 15.86% for the [ B-N ] sample up to 41.54% for [ B-A(1.00) ] . The batch experiments show that the acid-treated bentonite is more eþ ective than the natural bentonite in relation to sorption of linuron. The column experiments show that the B-A(1.00) sample might be reasonably used in removing linuron, the column efficiency increasing from 61.8% for the C = 7.63 mg dm-3 aqueous solution of linuron up to 77.6% for the C = 4.97 mg dm-3 one.