Abstract: The water-quenched slag of Baosteel No.4 blast furnace was treated by the acid-heat joint modification and then used as simulating the adsorption disposal of nitrobenzene wastewater. The effects factor for adsorption and its isothermal adsorption were studied. The results indicated that under the conditions of diameter of 100 mesh, dosage of 8 g/L, room temperature for reaction time of 60 min to treat the wastewater of 10 mg/L nitrobenzene, and pH value of 7, the removal rate of nitrobenzene reached 81.8%. The isothermal adsorption of removing nitrobenzene by the modified water-quenched slag fits the Langmuir and Freundlich equation mode well. The saturated adsorption capacity is 33.56 mg/g at room temperature, and the physical adsorption process of nitrobenzene is easily achieved.

Key words: Water-quenched slag, Acid-heat joint modification, Nitrobenzene, Adsorption