Abstract The quantity of liquid organic radioactive wastes produced by the use of radioactive materials in nuclear research facilities is small compared to aqueous radioactive waste, but a special and low-cost treatment method is needed. Here we investigated the adsorption performance of five materials, namely: KU-2 resin, bentonite, charcoal (M&S) and clay adsorbents for the successful removal of 90Sr/90Y from liquid scintillation cocktail waste. The batch adsorption technique (influence of pH, contact time, and temperature), sequential, and column technique were investigated. The efficiency of these adsorbents for the removal of 90Sr/90Y is in this order, resin > bentonite > clay with removal efficiency 90 ± 5.2, 68 ± 3.25, and 65 ± 5.3%, respectively. While charcoal has lower affinity for the sorption processes. Purification of liquid scintillation (LS) cocktail by separation of 90Sr/90Y was successfully carried out by packed column with KU-2 resin. The exhausted loaded column with 90Sr/90Y is successfully regenerated by 25 mL, 1 M HNO3. Characterizations of the original and the purified LS cocktail were carried out using FTIR analysis. The efficiency of the purified liquid scintillation waste (LSW) for the determination of radionuclide is about 62.67 ± 4.8.

中文翻译：

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使用不同吸附剂从结合放射性核素中纯化液体闪烁废物

摘要 核研究设施中使用放射性物质产生的液态有机放射性废物比水性放射性废物少，但需要一种特殊的低成本处理方法。在这里，我们研究了五种材料的吸附性能，即：KU-2 树脂、膨润土、木炭 (M&S) 和粘土吸附剂，用于成功去除液体闪烁混合物废物中的 90Sr/90Y。研究了分批吸附技术（pH、接触时间和温度的影响）、顺序吸附和柱吸附技术。这些吸附剂去除 90Sr/90Y 的效率依次为，树脂 > 膨润土 > 粘土，去除效率分别为 90 ± 5.2、68 ± 3.25 和 65 ± 5.3%。而木炭对吸附过程的亲和力较低。用 KU-2 树脂填充柱成功地通过分离 90Sr/90Y 纯化液体闪烁 (LS) 混合物。用 25 mL、1 M HNO3 成功再生了 90Sr/90Y 的耗尽负载柱。使用 FTIR 分析对原始和纯化的 LS 混合物进行表征。纯化的液体闪烁废物 (LSW) 测定放射性核素的效率约为 62.67 ± 4.8。