螯合树脂吸附Sr^(2+)的动力学和热力学研究  

Study on Adsorption of Sr^(2+) for Chelating Resin

作　　者：董兰[1] 杜阳[1] 马俊格[1] 邓冰[1] 成琼[1] 杨勇[1] 董亮[1] 余卫国[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900

出　　处：《环境科学与技术》2013年第10期168-172,共5页Environmental Science & Technology

基　　金：中国工程物理研究院核物理与化学研究所所科技创新基金(2011QP02)

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。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 solu- tions were studied in a batch reactor. Adsorption experiments were carded out as a function of time and temperature. The ki- netic 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 pseudo- second-order equation and Freundlich equation could provide the best correlation to the data. The adsorption was considered a spontaneous adsorption process with decalescence.

关 键 词：螯合树脂 吸附Sr2+ 动力学 热力学 

分 类 号：X132[环境科学与工程—环境科学]