“…[4][5][6] By virtue of the special crystal structure and its surface properties, PAL has been widely used in many elds such as in nanocomposites, 7,8 carriers of catalysts, 9,10 colloidal agents 11 and adsorbents. [12][13][14] Among them, the application of PAL as an adsorbent is especially of concerned. For one thing, the large specic surface area, good ion-exchange capability and rich surface groups of PAL make it easily capture adsorbates through hydrogen-bonding, ionexchange and complexation interactions of silanol groups with adsorbates; [15][16][17] for another, the isomorphous substitution of Al 3+ for Si 4+ in the tetrahedral layer and divalent cations (i.e., Mg 2+ , Fe 2+ , Zn 2+ and Ca 2+ ) for Al 3+ in the octahedral layer make PAL have negative surface charges, 18 so PAL more easily generates electrostatic attraction to cationic molecules or ions.…”