Fig. 5From: Bisacodyl removal from contaminated solution by synthesized mesoporous silica using experimental design methodLangmuir isotherm model for bisacodyl adsorption by mesoporous silica, the experiments were performed in the initial concentration of 5, 25, 50 mg/l, contact time of 18 h and pH of 7. The results were well fitted (R2 = 0.967) and showed the model’s prediction for removal of bisacodyl by mesoporous silicaBack to article page