Abstract This paper reports synthesis of oxime modified zeolite-A as an efficient adsorbent for uranium (U(VI)). The as prepared adsorbent was thoroughly characterised and the effect of various experimental parameters were also studied. Maximum adsorption occurs in the pH range of 4–6 with adsorption efficiency of 98%. Adsorption experiment results showed that the equilibrium data fitted well to Langmuir model and follow pseudo second order kinetics. More importantly the spent adsorbent was successfully regenerated and multicycles of adsorption and desorption were showing good efficiency in each run. The material is stable and reusable up to 8 cycles with constant adsorption efficiency. The adsorption capacity of 4.92 mg/g is observed for U(VI) in presence of other competing metal ions which include Cr, Cd, Co, Pb and Mn. It can be inferred from the results that oxime modified zeolite-A is a promising adsorbent for recovery of U(VI) due its easy separation, high adsorption and excellent reusability. Graphic abstract

中文翻译：

---

使用肟改性沸石-A 从水溶液中回收 U(VI) 的多循环吸附和解吸

摘要 本文报道了合成肟改性沸石-A 作为铀 (U(VI)) 的有效吸附剂。对所制备的吸附剂进行了彻底的表征，并研究了各种实验参数的影响。最大吸附发生在 4-6 的 pH 值范围内，吸附效率为 98%。吸附实验结果表明，平衡数据与朗缪尔模型拟合良好，符合伪二级动力学。更重要的是，用过的吸附剂成功再生，每次运行的吸附和解吸多循环都显示出良好的效率。该材料稳定，可重复使用多达 8 个循环，吸附效率恒定。在存在其他竞争性金属离子（包括 Cr、Cd、Co、Pb 和 Mn）的情况下，观察到 U(VI) 的吸附容量为 4.92 mg/g。结果表明，肟改性沸石-A因其易分离、高吸附性和良好的重复使用性，是一种很有前景的U(VI)回收吸附剂。图形摘要