Abstract
A hierarchical ANA zeolite with nanosheets-assembled spheres (SAS-ANA) was successfully prepared and used for the removal of lead ions from the aqueous solution. The characterization of the sample was investigated by X-ray Diffraction (XRD), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM) and Surface area (BET). A possible mechanism was proposed and verified by experiments. In the Pb2+ ions adsorption experiment, SAS-ANA adsorbed almost all the 25 mg of Pb2+ ions dispersed in 100 ml of water within 10 min which was more efficient than that of natural analcime (78.8% in 50 min). And the saturated adsorption capacity of SAS-ANA was 169.3 mg/g, which was much larger than that of natural analcime (67.5 mg/g), ZSM-5 (50 mg/g) and Al-MCM-41 (2 mg/g).
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