酰胺荚醚类萃取剂用于高放废液分离研究进展

Research Progress on Separation of HLLW Using Amido Podand Extractants

  • 摘要: 荚醚类萃取剂用于分离HLLW是近年来的研究热点。中国原子能科学研究院等研究单位在过去20年研究了多种酰胺荚醚(TODGA)萃取剂对An的萃取化学行为,并用筛选出的荚醚萃取剂开展了一系列组分离实验,用含N类软配体萃取剂开展了An(Ⅲ)和Ln(Ⅲ)的分离研究。同时,开发了基于TODGA提取Sr的流程。国内其他研究单位还进行了将分离试剂与固相材料相结合的固液吸附体系分离An、提取Sr的研究。本文总结了这方面的研究进展,并提出了进一步研究建议。

     

    Abstract: The development of HLLW separation technology using amido podand extractants is the research hotspots in recent years. In the past two decades, the extraction chemistry of An with a variety of amido podand extractants was studied in China Institute of Atomic Energy (CIAE), and a series of group separation experiments with the selected TODGA extractants were proposed. The separation of An(Ⅲ) and Ln(Ⅲ) with a soft N-donor ligand extractants was conducted. At the same time, a process of Sr extraction by TODGA was developed. The separation of An and extraction of Sr by solid-liquid adsorption system combining the isolating reagent with solid phase materials were also studied by relevant domestic research institutes. The study above was summarized in this paper and some suggestions for further research were put forward.

     

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