UIO-66-NH2 modified by BPDA for adsorption studies of U(VI)

In this study, a crystal material UIO-66-NH2-BPDA was designed by grafting BPDA onto UIO-66-NH2 and applied to extract U(VI) from aqueous solution. According to performance tests, UIO-66-NH2-BPDA exhibits excellent chemical and thermal stability. The experimental results show that U(VI) adsorption by UIO-66-NH2-BPDA was tested to be 346.58  mg g−1 at pH  = 4 andT = 298 K. The data simulation demonstrates that the adsorption process was consistent with Langmuir isotherm and pseudo-second-order model. Meanwhile, the thermodynamic parameters suggest that the adsorption process was spontaneous and endothermic. Most noteworthy is the good selectivity for U( VI) adsorption by UIO-66-NH2-BPDA. It can be seen that UIO-66-NH2-BPDA can be used as a potential effective adsorbent to remove U(VI) from wastewater.
Source: Journal of Radioanalytical and Nuclear Chemistry - Category: Nuclear Medicine Source Type: research