Adsorption Removal of Methyl Orange from Aqueous Solution by Mesoporous Al_2O_3

摘要

Mesoporous Al_2O_3 was synthesized from aluminum nitrate using different surfactants as structure-directing agents. The adsorption capability of prepared Al_2O_3 was studied in methyl orange solution. The Al2O3 prepared by Tween80-mediated has the best adsorption capability. The surfactant dosage influences the pore structure and adsorption capability of Al_2O_3, the best Tween80 dosage is 0.3g. Pore size distribution shows that the prepared Al_2O_3 has mesoporous structure, the pore diameter mainly centers at 1-4nm. For the inner diffusional resistance of the pore canal to achieve adsorption balance, suitable adsorption time is 80 minutes.