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作者曾报导了用偶氮氯膦I树脂分离富集微量UO_2~(2+)的研究。实验表明,含偶氮氯膦I基团的树脂对UO_2~(2+)有良好的吸附性能,可以从大体积溶液中定量富集微量UO_2~(2+)。为此我们研究了负载有偶氮氯膦I螯合剂的交换树脂的分析特性,并用于富集铀矿废水中微量UO_2~(2+)。实验部分 1.UO_2~(2+)标准溶液:称取一定量乙酸铀溶解于pH_4HAc-NaAc缓冲液中,制取10mg/ml铀标准溶液,临用时再以水稀释至适当浓度。 2.负载偶氮氯膦I树脂制备:称取湿D-290大孔阴离子交换树脂50g,加到含有一定量偶氮氯膦I的溶液中,搅拌,制得含有螯合剂量为75.1μM/g-干树脂的负载树脂(下称负载
The authors have reported the use of chlorophosphonazo I resin separation and enrichment of trace amounts of UO2 ~ (2+) research. Experiments show that the resin containing the chlorophosphonazo I group has good adsorption properties for UO 2 2+, and trace amount of UO 2 2+ can be quantitatively enriched from a large volume of solution. For this reason, we studied the analytical properties of the exchange resin loaded with the chlorophosphonazo I chelating agent and were used to enrich trace amounts of UO 2 2+ in uranium mine wastewater. Experimental part 1.UO_2 ~ (2+) standard solution: Weigh a certain amount of uranium acetate dissolved in pH_4HAc-NaAc buffer solution to prepare 10mg / ml uranium standard solution, and then dilute with water to the appropriate concentration. 2. Loaded chlorophosphonazo I resin preparation: Weigh wet D-290 macroporous anion exchange resin 50g added to a solution containing a certain amount of chlorophosphonazo I, stirring to prepare a chelating agent containing a dosage of 75.1μM / g-dry resin loaded resin (hereinafter referred to as load