Slag has also been used for dyes removal. The utilization of treated basic oxygen furnace slag (BOF slag) was successfully carried out to remove three synthetic textile dyes (reactive blue 19 (RB19), reactive black 5 (RB5) and reactive red 120 ( RR 120)) from aqueous solutions by Xue et al.. In the batch system, the maximum dye uptake on acid-treated BOF slag adsorbent was observed at pH 2.0, and the maximum RB5, RB19 and RR120 uptake capacities (at 500 mg/L dye concentration) were 76, 60 and 55 mg/g, respectively. Adsorption kinetic process followed firstorder kinetic model.