A montmorillonite inorgano-intercalation compound (MIIC) was synthesized by using a purified Na-exchanged bentonite (PNaB) as a matrix and Al-pillaring ion as an intercalating reagent under microwave irradiation .The synthesized products were characterized by X-ray diffraction (XRD),27Al magic angle sample-spinning nuclear magnetic resonance (27Al MAS NMR),specific surface area (BET) measurement,and adsorption density determination .The results show that,at 5% solid (PNaB) concentration and 7 minutes irradiation in a 130 W microwave oven,the basal spacing d(001) of the synthesized MIIC increases to 1 .740 nm from the original 1 .218 nm of PNaB .The MIIC has much higher adsorptive densities to F and Cr6+ from aqueous solution than the PNaB .The adsorption isotherm of F- on the MIIC follows the Freundlich equation,and the increased adsorption is mainly due to the porous structure of the MIIC which created larger adsorption surfaces .The adsorption isotherm of Cr6+ on MIIC follows the Langmuir equation and the adsorption is mainly monolayer as a result of chemisorptions .
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