采用静态实验方法研究了伊利石对水溶液中铀的吸附特性，通过批实验考察了反应时间、溶液初始浓度、pH值、离子强度、固液比以及温度对吸附的影响，用傅里叶变换红外光谱仪（ FTIR ）、X 射线衍射仪（ XRD）表征伊利石吸附铀前后结构的变化，探讨了伊利石对铀的吸附等温方程和热力学规律，分析其反应机制。实验结果显示，伊利石与低浓度铀溶液接触后立即反应，1 h后反应基本达到平衡；溶液pH和离子强度对伊利石吸附铀的影响显著，当pH＝4—7、离子强度为0?001 mol·L－1时，吸附效果最好；在一定条件下，伊利石对水溶液中低浓度铀的吸附量与铀初始浓度呈正比，与固液比呈反比；吸附等温线符合Freundlich模型，相关系数可达0?9966；伊利石对铀的吸附属于吸热反应，反应自发进行，高温促进伊利石的吸附行为。
The sorption of U(Ⅵ) from aqueous solution on illite was studied as a function of contact time, initial U(Ⅵ) concentration, pH, ionic strength, solid contents and temperature by the batch experiment. Before and after the adsorption, the illite was characterized with Fourier transform infrared spectrometry(FTIR) and X?ray diffraction(XRD). To analyze its reaction mechanism, the adsorption isotherm equation and thermodynamic parameters were discussed. The results indicated that U(Ⅵ) reacted with illite in aqueous solution as soon as they contacted, and a contact time of 1 h was enough to achieve sorption equilibrium. The sorption of U (Ⅵ) on illite was strongly dependent on pH and ionic strength. When the pH value was between 4 and 7, the highest adsorption capacity was attainted in 0?001 mol·L-1 NaNO3 solution. Under certain conditions, the adsorption of U(Ⅵ) on illite was inversely proportional to the solid?liquid ratio, and proportional to the initial concentration of U (Ⅵ) . The sorption pattern of U (Ⅵ) was consistent with Freundlich model, with a correlation coefficient of 0?9966. The sorption was enhanced at with high temperatures and the sorption of U(Ⅵ) on illite was a spontaneous and endothermic process.
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