Chelex 100和Chilete P树脂分离水中Sr^(2+)离子的研究

Study on separation of Sr^(2+) by Chelex 100 and Chilete Presin

通过对Chelex 100和Chilete P两种螯合树脂对水中Sr2+离子的静态和动态分离研究,考察浓度、pH值、体积和流速等条件的影响,设计正交实验,摸索树脂动态吸附和洗脱的工艺路线。结果表明:Chelex 100比Chilete P具有更好的Sr2+离子吸附效果,静态分离回收率分别为71.48%和51.49%。Chelex 100树脂的动态分离工艺:浓度为250mg·mL-1、pH值为3的Sr2+离子溶液20mL,以流速为3ml.min-1通过层析柱吸附;8mol.L-1的HNO3溶液以流速为2ml.min-1进行Sr2+离子的洗脱;获得最终回收率为87.08%。

The study on the application of chelating resin to separation of strontium metal ions was given.The adsorbing concentration,pH value,volume and velocity of flow of Chelex 100 and Chelite P resin from strontium solutions were studied in a batch reactor.Otherwise,orthogonal test was designed.The results show that adsorbing capacity of Chelex 100 resin was strong than Chelite P.the recovery of Sr2＋were 71.48%and 51.49%for static state separation.The optimum conditions of Chelex 100 resin to separation of strontium ions are as following,absorption conditions：concentration 250mg·mL-1,pH 3,volume 20mL,velocity of flow 2ml.min-1;desorption conditions：HNO3 concentration 8mol·L-1,velocity of flow 2ml·min-1.Ultimately,the recovery of Sr2＋was 87.08%.