Porous layered MOFs (Cu-BDC) for highly efficient uranyl-ion adsorption from aqueous solutions

This study synthesized a layered porous MOFs Cu-BDC by a simple solvothermal method, and the adsorption effect of materials on U(VI) were investigated by static adsorption experiments. The results show that the adsorption capacity of U(VI) reaches the maximum at 298.15  K pH = 6, with a maximum value of 1128.35 mg·g−1. Langmuir and Freundlich isotherm equations were used to fit the thermodynamic data, which were more consistent with Langmuir Isotherm model. Adsorption kinetics experiments show that Cu-BDC reaches adsorption equilibrium at 200  min, and the adsorption process is closer to the Pseudo-first-order kinetic equation, and the adsorption process is dominated by chemical control, physical control, and chemical control work together. Thermodynamics results indicate the spontaneous nature of U(VI) adsorption process onto Cu-BDC. I n addition, The unique porous Layered structure and abundant active sites are the reasons for the high adsorption capacity of the materials.
Source: Journal of Radioanalytical and Nuclear Chemistry - Category: Nuclear Medicine Source Type: research