Abstract
AbstractRemoval of isomorphously substituted Al from the layer of Zn−Al LDHs by treating with organic acids like para‐toluenesulfonic acid, phenoldisulfonic acid followed by Ammonium hexafluro silicate under microwave irradiation result in increased surface area, generating materials which are highly mesoporous. The dealuminated Zn−Al LDHs were characterized by BET surface area, XRDand 27Al– NMR. Adsorption data of as‐synthesized and dealuminated Zn−Al LDHs for various polar and nonpolar organic compounds at different time intervals were evaluated. Adsorption data were fitted with the models such as fractional power, pseudo‐first order and Elovich models. The Elovich model provided high degree of correlation. Modified Zn‐Al LDH adsorbent showed increased adsorption of organic compounds compared to as‐synthesized Zn−Al LDH because of high surface area. Reusability of used adsorbent showed almost same adsorption capacity as the fresh adsorbent.
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