【摘要】 为缩短测量90Sr的前期处理流程,寻找能够较快分离Sr2+离子的方法,通过红外图谱和XPS分析了螯合树脂结构,并采用静态吸附实验研究了螯合树脂对水溶液中Sr2+的吸附行为。探讨Chelex 100和Chelite P 2种常用树脂吸附金属Sr2+的动力学和热力学性质,考察不同温度对吸附性能的影响。分别用准一级动力学模型、准二级动力学模型、Langmuir模型和Freundlich模型对吸附数据进行拟合研究。结果发现:准二级动力学模型和Freundlich模型能更好地描述2种树脂的吸附过程;热力学数据表明吸附是一个自发吸热的过程;Chelex 100比Chelite P更具有吸附Sr2+离子的优势。更多还原

【Abstract】 In order to shorten the time of preliminary treatment process, the application of chelating resin to separation of strontium metal ions was studied. The adsorption kinetics, thermodynamics of Chelex 100 and Chelite P from Sr(NO3)2 solutions were studied in a batch reactor. Adsorption experiments were carried out as a function of time and temperature. The kinetic data were respectively fitted by pseudo-first-order equation, pseudo-second-order equation model. Simultaneously, the thermodynamics data were matched with Langmuir equation, Freundlich equation model. The results showed that the pseudosecond-order equation and Freundlich equation could provide the best correlation to the data. The adsorption was considered a spontaneous adsorption process with decalescence.更多还原