Adsorptive separation of La(Ⅲ) from aqueous solution via the synthesized [Zn(bim)2(bdc)]n metal-organic framework

• 作者: Sareh Ammari Allahyari Reza Saberi Kamran Sepanloo Ahmad Lashkari
• 来源期刊: 稀土学报（英文版）
• 年，卷（期）: 2021,（6）
• 所属期刊栏目: CHEMISTRY AND HYDROMETALLURGY
• 页码范围: 742-748
• 页数: 7页
• 语种: 英文

摘要

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 spec-troscopy (FTIR) and thermogravimetric analysis (TGA).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 to be about 130 mg/g.Thermodynamic studies demonstrate the endothermic and chemical nature of lanthanum adsorption,while kinetic studies suggest the pseudo-first-order of reaction.In column mode,the effect of solution flow rate passing through the fixed-bed was studied.Experimental data confirm that increasing the bed flow rate causes a decrease in the adsorption capacity of lanthanum ions on the synthesized MOF.