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本文叙述了改进多聚銻酸的制备方法,得到含5个結晶水的PAA晶体,从模拟的1AW废液中直接回收~(90)Sr。对溫度、流速、酸度在回收~(90)Sr的的影响,以及淋洗条件等进行了一系列的实驗,并用裂变产物进行了模拟回收~(90)Sr的实驗。說明这种改进的PAA无机离子交換剂,对锶具有較大的选择交换容量,对杂質离子具有較好的去污效果和較快的交換速度。能够从1AW模拟液中直按回收~(90)Sr,并初步确定了回收~(90)Sr的流程方案。
This paper describes the preparation of modified poly (antimonium) acid and the preparation of PAA crystals containing 5 crystal water. The ~ (90) Sr was directly recovered from the simulated 1AW wastewater. A series of experiments were carried out on the effects of temperature, flow rate, acidity on the recovery of ~ (90) Sr, and the elution conditions. The experiment of simulated recovery of ~ (90) Sr was carried out with fission products. This shows that the improved PAA inorganic ion exchangers have greater selective exchange capacity for strontium and better decontamination effect and faster exchange rate for impurity ions. The recovery of ~ (90) Sr from 1AW simulation liquid can be directly carried out, and the process scheme of ~ (90) Sr recovery can be preliminarily determined.