Studies on recovery of uranyl carbonate and concentration of the isotopes using high efficient amino acid resins

高效氨基酸树脂回收碳酸铀酰及同位素浓缩的研究

基本信息

批准号：
08458121
负责人：
UEDA Kazumasa
金额：
$ 3.9万
依托单位：
Kanazawa University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08458121/
关键词：
Uranyl carbonate Amino acid resins Separation and concentration Uranium isotopes

项目摘要

1. Synthesis of high efficient amino acid resins and the resin properties : We have synthesized 30 types of amino acid resin, introducing amino acid or imitative amino acids into poystirene resin according to the solid phase synthetic method of peptides. Amino acid contents introduced were estimated to be about 2-3.7 mmol/g-resin (introducing rates, 73-100%) and the resin properties were evaluated by the measurement of ion exchange capacity, water content, FT-IR and etc.. We alsoinvestigated a washing effect with acids, alkali soaking and repeated uses of the resins, and clarified that the developed resins were highly efficient and functinal ones.2. Collction capacity and selection function of the resins to uranium : We have practically performed a high functionalization of the resins, because they possessed the durability for use and large equilibrium adsorption amounts, e.g., above 1gU/g-resin in Arg-and beta -Ala-AMR resins. We have also recognized high adsorptive activity of the re … More sins toward cabonate species of uranium, and the adsorptive order of uranium salts was nitrate < bromide < acetate < chloride < sulfate carbonate.The protonated amino residue in the resin may behave as a driving force for adsorptions, and the selective adsorptive function was confirmed by the isoterm analysis for adsoption, macro separation from thorium and heavy metal mixtures, and uranium recovery from sea water matrixes. Thereafter, the development of the resin to fibrous adsorbent would be desirable.3. Separation and concentration behaviors of uranium isotopes : The separation and concentration behaviors of natural uranium isotopes were tracesd by contacting the resins using batch method. The separation factors of ^<234>U/^<238>U in each resin were determined by alpha -ray measurement. The ester type resins introduced amino acid by ester bonding into PSt resin showed larger concentration effect than that of amido-bonding types. It suggests that the oxidation -redox action of amino acid within the resin behaved as a acceleration factor for the concentration. Although this effect would depend upon amino acids introduced and solution and temparature conditions, some resing showed separation factors above 330 times comparing with that of the oxidation-redox equilbria in solution and above 8600 times against the complxation method. The factors of ^<235>U/^<238>U were measured by ICP-MS method. But, we could not perform wholly a meaning evaluation, due to large errors at the measurement. Besides, we recognized separation trends of the isotopes by soaking the resins in sea water. Hereafter, one might expect that amino acid resins would be applied to the separation system with high multistage contact. Less

1。高效氨基酸树脂和树脂特性的合成：我们根据辣椒的固相合成方法合成了30种类型的氨基酸树脂，将氨基酸或模仿氨基酸引入poystirene树脂。估计引入的氨基酸含量约为2-3.7 mmol/g-resin（引入速率为73-100％），通过测量离子交换能力，水含量，ft-ir等来评估树脂性能。我们还研究了酸，碱浸泡和重复使用的氧化物和溶质的酸度，并高度高效2含酸，并具有高度的溶质和溶液的效果。树脂对铀的收集能力和选择功能：我们实际上对树脂进行了高功能化，因为它们具有使用的耐用性和较大的等效吸附量，例如，在Arg-and beta-beta-beta-Ala-ala-Ala-Amr耐药性中具有1GU/G-resin。我们还认识到，对铀的木炭酸种类有更多的罪行，铀盐的吸附顺序是硝酸盐<溴化物<溴化物<乙酸<乙酸<乙酸<氯化物<氯化物<氯化碳酸盐。 adsoption，宏观分离，与重金属混合物和海水基质中的铀回收。此后，希望将树脂向纤维吸附剂的发育发展。3。铀同位素的分离和浓度行为：通过使用批处理方法接触树脂，天然铀同位素的分离和浓度行为是TracesD。每个树脂中 ^<234> u/ ^<238> u的分离因子通过α射线测量确定。酯类型树脂通过将酯键合成PST树脂引入氨基酸，比胺 - 键入类型的浓度效应更大。这表明氨基酸在树脂中的氧化 - 雷克斯作用表现为浓度的加速因子。尽管这种作用取决于引入的氨基酸以及溶液和温度条件，但与溶液中氧化 - 雷克斯相等的氧化 - 雷克斯等于330倍以上的分离因子与反对方法相比，氧化 - 雷克斯相等症。通过ICP-MS方法测量 ^<235> u/ ^<238> U的因子。但是，由于测量中的错误，我们无法完全执行含义评估。此外，我们通过将树脂浸泡在海水中来认识到同位素的分离趋势。此后，人们可能期望将氨基酸树脂应用于具有高度阶段接触的分离系统。较少的