To discharge waste liquid containing radioactive iodine into sewage systems, long-term storage or dilution with a large amount of water may be required until the radioactivity concentration reduces below the standard value. Processing the waste liquid could be easier if radioactive iodine could be separated from the water. This study verified the effectiveness of superabsorbent polymer and α-cyclodextrin as treatment agents to separate radioactive iodine from waste liquids. Sodium iodide (Na125I) was added to purified water and artificial urine to prepare simulated waste liquids containing iodine equivalent to the urine of patients treated with radioactive iodine. The as-prepared simulated waste liquid was poured into a container with superabsorbent polymer and left for 90 d. The residual iodine rate in the simulated waste liquid was estimated by measuring 125I radioactivity. When the water was sufficiently dried, residual iodine rates on day 15 were 0.102 and 0.884 in the simulated waste liquids comprising purified water and artificial urine, respectively. The simulated waste liquid comprising purified water with 5% α-cyclodextrin absorbed by 1 g of superabsorbent polymer had a residual rate of 0.980. Moreover, the residual rate of simulated waste liquid comprising artificial urine with 2% α-cyclodextrin absorbed by 1 g of SAP was 0.949. Superabsorbent polymer combined with α-cyclodextrin was an effective treatment agent for separating radioactive iodine from waste liquids.

中文翻译：

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处理剂从废液中分离放射性碘的可行性。

将含放射性碘废液排入污水系统时，可能需要长期储存或用大量水稀释，直至放射性浓度降至标准值以下。如果放射性碘可以从水中分离出来，处理废液就会更容易。本研究验证了高吸水性聚合物和α-环糊精作为处理剂从废液中分离放射性碘的有效性。将碘化钠（Na125I）添加到纯化水和人工尿液中，制备含碘量相当于接受放射性碘治疗的患者尿液的模拟废液。将制备好的模拟废液倒入盛有高吸水性聚合物的容器中，放置90 d。通过测量 125I 放射性来估算模拟废液中的残留碘率。当水充分干燥时，第15天时纯水和人造尿模拟废液中的残留碘率分别为0.102和0.884。由1g高吸水性聚合物吸收5％α-环糊精的纯化水组成的模拟废液的残留率为0.980。另外，1g SAP吸收的含有2％α-环糊精的人工尿的模拟废液的残留率为0.949。高吸水性聚合物与α-环糊精结合是一种有效分离废液中放射性碘的处理剂。