Abstract In this investigation, a novel application of Aliquat 336 (tricaprylmethylammonium chloride)-impregnated chitosan (AICS) for the separation and purification of 99Mo from some fission products, such as 137Cs, 85Sr and 131I, in alkaline solution is presented. Before impregnation, pristine chitosan experienced no adsorption affinity for Mo. However, this situation dramatically changed after the impregnation. The structure of AICS was elucidated by FTIR, SEM and EDX spectra. The influence of contact time, solution pH, weight of AICS, initial Mo concentration and temperature on the adsorption process was studied. Kinetic studies revealed that the rate of adsorption was impressively very fast and only 3 min were sufficient to reach equilibrium. The pH influence showed that Mo could be effectively adsorbed over a wide range of pH 3–11. The equilibrium data fitting to isotherms models followed the order Langmuir > Freundlich > Dubinin-Radushkevich. Based on the Langmuir model, the maximum adsorption capacity was computed at 60.1 mg/L. Thermodynamic studies indicated that the adsorption process is spontaneous and endothermic in nature. Finally, a pure solution of 99Mo with a purity >99 % was obtained from a real sample. The data obtained confirmed that AICS is a promising candidate for separation and purification of 99Mo from alkaline media.

中文翻译：

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一种新型离子液体浸渍壳聚糖在碱性溶液中分离纯化裂变 99Mo 的应用

摘要 在这项研究中，介绍了 Aliquat 336（三辛基甲基氯化铵）浸渍壳聚糖 (AICS) 在碱性溶液中从 137Cs、85Sr 和 131I 等裂变产物中分离和纯化 99Mo 的新应用。在浸渍之前，原始壳聚糖对 Mo 没有吸附亲和力。然而，这种情况在浸渍后发生了巨大的变化。通过FTIR、SEM和EDX光谱阐明了AICS的结构。研究了接触时间、溶液pH、AICS重量、初始Mo浓度和温度对吸附过程的影响。动力学研究表明，吸附速率非常快，仅 3 分钟就足以达到平衡。pH 值的影响表明 Mo 可以在很宽的 pH 值 3-11 范围内有效吸附。拟合等温线模型的平衡数据遵循 Langmuir > Freundlich > Dubinin-Radushkevich 的顺序。基于朗缪尔模型，最大吸附容量计算为 60.1 mg/L。热力学研究表明吸附过程是自发吸热的。最后，从实际样品中获得纯度 >99% 的 99Mo 纯溶液。获得的数据证实 AICS 是从碱性介质中分离和纯化 99Mo 的有希望的候选者。从实际样品中获得纯度 >99% 的 99Mo 纯溶液。获得的数据证实 AICS 是从碱性介质中分离和纯化 99Mo 的有希望的候选者。从实际样品中获得纯度 >99% 的 99Mo 纯溶液。获得的数据证实 AICS 是从碱性介质中分离和纯化 99Mo 的有希望的候选者。