Abstract Lanthanum is one of the rare earth metals which due to specific chemio–physical properties, has wide applications in different industries. In this research, the ability of the synthesized metal-organic framework (MOF), [Zn(bim)2(bdc)]n (ZBB) for the removal of lanthanum ions from the aqueous stream was investigated in the batch and column processes. The synthesized MOF was characterized by using scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET), Fourier transform infrared spectroscopy (FTIR), and Thermo gravimetric analysis (TGA) analysis. The effect of pH on lanthanum ions adsorption was evaluated in the range from 1 to 7. Moreover, isothermal, kinetic, and thermodynamic parameters for adsorption of La(III) ions onto the synthesized MOF were evaluated. The adsorption capacity of lanthanum ions onto the synthesized MOF was calculated by about 130 mg/g. Thermodynamic studies demonstrated the endothermic and chemical nature of Lanthanum adsorption, while kinetic studies suggested the pseudo-first-order of reaction. In column mode, the effect of solution flow rate passing through the fixed-bed was studied. Experimental data confirmed that increasing the bed flow rate causes a decrease in the adsorption capacity of lanthanum ions on the synthesized MOF.

中文翻译：

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通过合成的 [Zn(bim)2(bdc)] 金属有机骨架从水溶液中吸附分离 La(III)

摘要 镧是稀土金属之一，由于其特殊的化学物理性质，在不同的行业中有着广泛的应用。在这项研究中，研究了合成的金属有机骨架 (MOF) [Zn(bim)2(bdc)]n (ZBB) 从水流中去除镧离子的能力，在分批和柱工艺中进行了研究。通过使用扫描电子显微镜 (SEM)、Brunauer-Emmett-Teller (BET)、傅里叶变换红外光谱 (FTIR) 和热重分析 (TGA) 分析对合成的 MOF 进行表征。在 1 到 7 的范围内评估了 pH 值对镧离子吸附的影响。此外，还评估了将 La(III) 离子吸附到合成 MOF 上的等温、动力学和热力学参数。镧离子在合成的 MOF 上的吸附容量计算为约 130 mg/g。热力学研究证明了镧吸附的吸热和化学性质，而动力学研究表明反应是准一级反应。在柱模式下，研究了通过固定床的溶液流速的影响。实验数据证实，增加床流速会导致镧离子在合成 MOF 上的吸附能力降低。