In the paper Purolite S957 was used to determine the most effective conditions for the separation of La(III) and Ni(II) ions from acidic solutions. Preliminary studies of the sorption of La(III), Ce(III), Nd(III), Fe(III), Ni(II), Co(II), Cu(II) and Zn(II) mixture were carried out. The sorption process efficiency depends on the HNO₃ concentration, contact time, initial metal concentration and temperature. Maximum sorption capacities amount to 0.46 ± 0.023 mmol/g for La(III) ions and 0.38 ± 0.019 mmol/g for Ni(II). To study the kinetics and process mechanism, the pseudo-first order, pseudo-second order equations, Weber-Morris intraparticle diffusion and Boyd models were applied. The equilibrium was described using the Langmuir, Freundlich and Temkin isotherm models. The desorption studies were also carried out. The morphology of ion exchanger was analyzed using scanning electron microscopy, optical microscopy and atomic force microscopy. The interactions of metals with the ion exchanger were confirmed by the attenuated total reflectance Fourier transform infrared spectroscopy, Raman and X-ray photoelectron spectroscopy before and after the sorption process. Furthermore, the point of zero charge of Purolite S957 was determined. The obtained results can be used to assess the potential of ion exchanger application for recovery of rare earth elements and heavy metals from spent nickel-metal hydride batteries.

在论文中，Purolite S957用于确定从酸性溶液中分离La（III）和Ni（II）离子的最有效条件。对La（III），Ce（III），Nd（III），Fe（III），Ni（II），Co（II），Cu（II）和Zn（II）混合物的吸附进行了初步研究。吸附过程的效率取决于HNO ₃浓度，接触时间，初始金属浓度和温度。La（III）离子的最大吸附容量为0.46±0.023 mmol / g，Ni（II）的最大吸附容量为0.38±0.019 mmol / g。为了研究动力学和过程机理，应用了拟一阶，拟二阶方程，Weber-Morris颗粒内扩散和Boyd模型。使用Langmuir，Freundlich和Temkin等温线模型描述了平衡。还进行了脱附研究。使用扫描电子显微镜，光学显微镜和原子力显微镜分析离子交换剂的形态。吸附过程之前和之后，通过衰减全反射傅里叶变换红外光谱，拉曼光谱和X射线光电子能谱确认了金属与离子交换剂的相互作用。此外，确定Purolite S957的零电荷点。获得的结果可用于评估应用离子交换剂从废镍金属氢化物电池中回收稀土元素和重金属的潜力。