The research about the preparation and characterization of AI2O3 pillared bentonite and the effect NaOH concentration on the adsorption. The characterization included acidity (ammonia and pyridine) dan X-Ray Diffraction (XRD).Natural bentonite activated by H2SO4 2M. This material was intercalated and pillarization with polikation Al type Keggin [Ali304(0H)24(H20)|2]7+ and was calcined at temper…