This study, atermit factory solid wastes were used as an adsorbent to remove Reactive Red 45 (RR45) from aqueous solution by batch method. Effects of pH, initial dye concentration and time were studied. It was found that the removal of RR45 increased with increasing initial dye concentration Adsorption isotherms were analyzed by Langmuir and Freundlich models. Moreover, kinetic of adsorption were studied. Pseudo second order is the best model for the removal of RR45 from aqueous solution. Thermodynamic parameters were also studied. Gibbs free energy value was found to be -5.320 kJ/mol and indicating the spontaneity of the system. Atermit factory solid wastes were characterized by SEM. As a result, atermit factory wastes could be employed as no-cost and effective adsorbent for the removal of RR45 from aqueous solution.