ADSORPTION EQUILIBRIUM OF URANIUM FROM AQUEOUS [UO2(CO3)3]4- SOLUTIONS ON A POLYMER BEARING AMIDOXIME GROUPS
ADSORPTION EQUILIBRIUM OF URANIUM FROM AQUEOUS [UO2(CO3)3]4- SOLUTIONS ON A POLYMER BEARING AMIDOXIME GROUPS
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DOI：
10.1039/dt9860001983
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发表时间：
1986-09-01
期刊：
影响因子：
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通讯作者：
ITAGAKI, T
中科院分区：
文献类型：
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作者：
HIROTSU, T;KATOH, S;ITAGAKI, T
本文研究了在pH 8-9的条件下，含三碳酸根合硫脲（VI）离子的水溶液中铀在偕胺肟基聚合物上的吸附平衡。结果表明，吸附过程是通过三个碳酸根离子与带有两个偕胺肟基的铀酰离子的配体交换进行的，并伴有去质子化反应。与该聚合物形成的铀酰（VI）络合物比与乙酰偕胺肟形成的铀酰络合物更稳定，表明该偕胺肟聚合物具有从海水中回收铀的潜力。
The adsorption equilibrium of uranium from aqueous solutions containing tricarbonatouranate(VI) ions on a polymer bearing amidoxime groups was examined at pH 8–9. It is suggested that the adsorption proceeds by ligand exchange of three carbonate ions on the central uranyl(VI) ion with two amidoxime groups, accompanied by deprotonations. The uranyl(VI) complex formed with the polymer was found to be more stable than that with acetamidoxime as a ligand, suggesting that the amidoxime polymer has potential for the recovery of uranium from sea-water.