Preparation And Characterization Of Beta-Cyclodextrin/Poly(Acrylic Acid)/Permutite Hydrogel Composite For U(Vi) Adsorption

Uranium in the environment can damage human health and ecosystem. There is a need for excellent adsorbents to remove U(VI) from aqueous solutions. Here we synthesized a novel beta-cyclodextrin/poly(acrylic acid)/permutite (CAP) hydrogel composite by a simple method. Physicochemical characterizations of the materials were conducted by XRD, FTIR, SEM, EDX, and TGA. The effect of pH value, contact time, initial U(VI) concentration, and temperature were researched. A pseudo-second-order kinetic model, intra-particle diffusion model, and Langmuir isotherm model were used to describe the U(VI) adsorption behavior, and the maximum adsorption capacity of U(VI) was 833.33 mg/g at 25 C. Thermodynamic analysis showed that the adsorption process of U(VI) was endothermic and spontaneous. Furthermore, the excellent reusability indicated that CAP hydrogel composite could be potentially used as a promising sorbent for the removal of U (VI) in wastewater.