摘要
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 novelβ-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℃.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.
基金
the Scientific Research Initiation Project of Fuzhou University for Thousand Talents Program Experts(0041-510248)
the Science and Technology Development Fund of Fuzhou University(0041-510299)。
