This work studies the removal of uranium ions from chemically leached solutions by sorption using two weak and two strong base anionites. Batch sorption experiments were performed to evaluate the optimum conditions at pH 1.2–2.2, 1.0 g resin dose for 1–12 h contact time at room temperature. These experiments addressed sorption kinetics and sorption isotherm. The maximum sorption capacity reached 55.8 mg/g at room temperature. The kinetics data are well described by the pseudo-second-order kinetic model at initial uranium concentration of 0.62 mg·L⁻¹. To describe sorption kinetics pseudo-first-order, pseudo-second-order and intraparticle diffusion models were proposed. Studies indicated that the sorption of uranium can be fitted by a pseudo-second-order kinetic model very well. Equilibria were described by Langmuir, Freundlich, and Dubinin–Radushkevich equations. The experimental sorption isotherm is successfully described by the Langmuir model.

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使用离子交换从黑页岩浸出液中回收铀（VI）：动力学和平衡研究

这项工作研究了使用两种弱碱和两种强碱型阴离子吸附剂从化学浸出溶液中去除铀离子的方法。进行了分批吸附实验以评估在pH 1.2-2.2、1.0 g树脂剂量，室温下接触时间1-12 h的最佳条件。这些实验解决了吸附动力学和吸附等温线。在室温下最大吸附容量达到55.8mg / g。初始铀浓度为0.62 mg·L ^-1时，通过伪二级动力学模型可以很好地描述动力学数据。。为了描述吸附动力学，拟一级，拟二级和颗粒内扩散模型被提出。研究表明，铀的吸附可以通过拟二级动力学模型很好地拟合。平衡由Langmuir，Freundlich和Dubinin-Radushkevich方程描述。Langmuir模型成功地描述了实验吸附等温线。