Abstract

The possibility of removing U(VI) from aqueous solutions using layered double hydroxides of Mg and Al, which contain β-cyclodextrin (LDH-Mg-Al-CD), has been studied. It is found that LDH-Mg-Al-CD does not sorb [UO₂(CO₃)₃]^–4 (the sorption degree does not exceed 0.001% after 24-h contact between the solid and liquid phases). At the same time, it is established that the application of LDH-Mg-Al-CD allows the quick and efficient cleaning of 10^–2–10^–3 mol/L aqueous solutions of UO₂(NO₃)₂. For all the synthesized LDH-Mg-Al-CD, a degree of U(VI) sorption from 10^–3 and 10^–2 aqueous solutions of UO₂(NO₃)₂ which is higher than 99.9% is achieved after 30 and 60 min of contact between the solid and liquid phases at V/m = 100 mL/g, respectively. The investigations of the liquid phase after 24-h contact between water and LDH-Mg-Al-CD with sorbed U(VI) revealed an almost complete lack of the U(VI) desorption into the aqueous phase.

中文翻译：

---

用β-环糊精从水溶液中吸附U(VI)到Mg和Al的层状双氢氧化物上

摘要

已经研究了使用含有 β-环糊精 (LDH-Mg-Al-CD) 的 Mg 和 Al 的层状双氢氧化物从水溶液中去除 U(VI) 的可能性。发现LDH-Mg-Al-CD不吸附[UO ₂ (CO ₃ ) ₃ ] ^–4（固液相接触24小时后吸附度不超过0.001%）。同时，确定了LDH-Mg-Al-CD 的应用可以快速有效地清洗10 ^–2 –10 ^–3 mol/L 的UO ₂ (NO ₃ ) ₂水溶液。对于所有合成的 LDH-Mg-Al-CD，U(VI) 吸附度为^10-3和^10-2固相和液相分别以V / m = 100 mL/g接触 30 和 60 分钟后，获得高于 99.9%的 UO ₂ (NO ₃ ) ₂水溶液。对水和 LDH-Mg-Al-CD 与吸附的 U(VI) 接触 24 小时后液相的研究表明，U(VI) 几乎完全没有解吸到水相中。