HKUST-1金属有机骨架材料对水溶液中稀土离子的选择性吸附  

Selective Adsorption of Rare Earth Ions on HKUST-1 Metal-Organic Framework From Aqueous Solution

作　　者：赵亮[1,2] 方向晨 王刚[1] 段晓光[2,3] 王少彬 ZHAO Liang;FANG Xiangchen;WANG Gang;DUAN Xiaoguang;WANG Shaobin(Fushun Research Institute of Petroleum and Petrochemicals, SINOPEC, Fushun 113001, China;Department of Chemical Engineering, Curtin University, Perth 6845, Australia;School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide 5005, Australia)

机构地区：[1]中国石化抚顺石油化工研究院,辽宁抚顺113001 [2]科廷大学化学工程系,澳大利亚珀斯6845 [3]阿德莱德大学化工与新材料学院,澳大利亚阿德莱德5005

出　　处：《石油学报（石油加工）》2021年第2期391-399,共9页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：新材料人才境外培训计划项目(P173008052);中国石油化工股份有限公司项目(119002)资助。

摘　　要：在水热条件下合成了铜基金属有机骨架材料(HKUST-1),以稀土离子为吸附对象,研究了HKUST-1吸附前后理化性质的变化规律,得到其吸附动力学方程的拟合曲线。结果表明:在25℃和pH=6条件下,HKUST-1对铈离子(Ce^(3+))和镧离子(La^(3+))的最大吸附量分别为234和203 mg/g;在金属离子混合溶液中,对稀土离子(Ce^(3+)和La^(3+))的选择性达到87%;吸附过程符合准二级动力学模型。再生后的HKUST-1(HKUST-1-R)对稀土离子的吸附量下降显著,说明HKUST-1吸附稀土离子的过程不仅有离子交换反应,还有络合配位反应。Cu-based metal-organic framework(HKUST-1)was synthesized under hydrothermal conditions.With using rare earth ions as adsorption materials,physicochemical property changes of HKUST-1 before and after adsorption were studied.Based on the above experimental data,adsorption kinetic equations were established.Experimental results showed that,at 25℃and pH=6,the maximum adsorption capacities of Ce^(3+)and La^(3+)on HKUST-1 were 234 and 203 mg/g,respectively.It was also measured that,for the mixed solution of metal ions,the adsorption selectivity of rare earth ions(Ce^(3+)and La^(3+))was 87%.The adsorption process follows Pseudo-second-order rate equation.It was found that the adsorption capacity of rare earth ions on regenerated HKUST-1(HKUST-1-R)decreased significantly.This suggests that both ion exchange and complexation coordination occurred during adsorption process.

关 键 词：金属有机骨架材料 HKUST-1 选择性吸附 稀土离子 络合配位 

分 类 号：O627[理学—有机化学]