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用 D-290大孔阴离子交换树脂吸附有机试剂偶氮胂Ⅰ制备了含有偶氮胂Ⅰ基团的负载树脂。用静态法和柱法研究了负载树脂对铀酰吸附反应的最佳 pH、吸附的平衡速度、交换容量等吸附特性。在柱操作条件试验基础上,拟定了用 EDTA 作为掩蔽剂从大体积溶液中定量富集微量铀酰的方法,并用于富集铀矿废水中微量铀取得较好结果。
Arsenazo Ⅰ group-containing supported resin was prepared by adsorption of arsenazo Ⅰ, an organic reagent on D-290 macroporous anion exchange resin. The static adsorption method and column method were used to study the adsorption properties of supported resin, such as optimum pH, adsorption equilibrium speed, exchange capacity and so on. Based on the experimental conditions of column operation, a method for quantitative enrichment of trace uranyl-rich uranium from large volumetric solution using EDTA as a masking agent was developed, and was used to enrich the trace uranium in uranium mine wastewater to obtain better results.