In this paper, we report the development of an environmental friendly process to decontaminate uranium-containing ores and nuclear wastes by using non-fluorinated ionic liquids (ILs). The main advantages of this extraction process are the absence of any organic diluent and extra extraction agents added to the organic phase. Moreover, the process is cost-effective and maybe applied as a sustainable hydrometallurgical method to recover uranium. The distribution ratio (D_U) and the extraction efficiency (%E) of uranium(VI) (UO₂²⁺) were found to be dependent on the acidity of the aqueous phase, the extraction time, the alkyl chain length in the ILs, the concentration of the aqueous feed and molar quantity of ILs. The D_U value is higher than 600 and the %E is equal to 98.6% when [HNO₃] = 7 M. The extraction reactions follows a neutral partition or ionic exchange mechanism depending on nitric acid concentration.The nature of bonding in the extracted complexes was investigated by spectroscopic techniques. The potential use of Mor_1-8-OP for the separation of UO₂²⁺ from a mixture containing transition metal ions Mⁿ⁺ was also examined. The UO₂²⁺ ions were separated and extracted efficiently. These ILs are promising candidates for the recovery and separation of uranium.

中文翻译：

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使用基于H膦酸酯阴离子的新型未稀释离子液体，从过渡金属中高效萃取和选择性分离铀（VI）

在本文中，我们报告了通过使用非氟化离子液体（IL）净化含铀矿石和核废料的环境友好方法的发展。该萃取过程的主要优点是不存在任何有机稀释剂，并且无需在有机相中添加额外的萃取剂。此外，该方法具有成本效益，并且可以用作回收铀的可持续湿法冶金方法。发现铀（VI）（UO ₂ ²⁺）的分配比（D _U）和萃取效率（％E）取决于水相的酸度，萃取时间，离子液体中的烷基链长，水性进料的浓度和IL的摩尔量。该d _ü当[HNO ₃ ] = 7 M时，该值大于600，％E等于98.6％。根据硝酸的浓度，萃取反应遵循中性分配或离子交换机理。研究了萃取物中配合物的键合性质通过光谱技术。还检查了将Mor _1-8 -OP用于从含过渡金属离子M ^{n +}的混合物中分离UO ₂ ²⁺的潜在用途。分离并有效地提取了UO ₂ ²⁺离子。这些离子液体是铀回收和分离的有前途的候选者。