Preparation and Characterization of β-Cyclodextrin/Poly(acrylic acid)/Permutite Hydrogel Composite for U(Ⅵ) Adsorption

• 作者: OU Min-Rui XU Xiao-Ping ZHANG Wen ZHANG Zi-Hui
• 来源期刊: 结构化学
• 年，卷（期）: 2020,（10）
• 所属期刊栏目: materials structural chemistry
• 页码范围: 1795-1806
• 页数: 12页
• 语种: 英文
• DOI: 10.14102/j.cnki.0254-5861.2011-2728

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 ofU (Ⅵ) in wastewater.