Application of Surfactant-Modified Bentonite for Methylene Blue Adsorption from Aqueous Solution

Dye is an important chemical and, recently, its application in the world has boosted; however the skin irritation and cancer are of the detrimental effects of this chemical. Therefore, prior to discharge, the dye-contain effluents, in order to meet the standard values, should be treated. The present work are seeking to appraise the kinetics and isotherms of the Methylene Blue (MB) adsorption onto the surfactant (cetyltrimethylammonium bromide)-modified bentonite (CTAB-MB) in a batch study in a laboratory. The study of the MB adsorption efficiency was accomplished in batch system under different amount of effective parameters including contact time, adsorbent dosages and MB dye concentration. Optimum CTAB-MB dosage and contact time was achieved to be 2.5 g/L and 75 min, respectively. The results of isotherm studies showed the better ability of Langmuir mono-layer isotherm in explanation of the equilibrium data and the highest adsorption capacity, based on this model, was obtained to be 36.19 mg/g. According our obtained results, the CTAB-MB was obtained to be potent and efficient adsorbent to remove the MB from the studied synthetic solutions.