Novel N-Substituted 2,2′-Oxydiacetic Acid Diamide-Functionalized Silica Resins: An Efficient Sorbent for Removal of U(VI) and Th(IV) Present in Nitric Acid-Rich Effluents

Diglycolic Acid Monoamide-Functionalized UiO-66-Based Metal Organic Framework (MOFDGAMA) for Selective Removal of UO22+ and Th4+

“…Thermodynamical parameters controlling the sorption phenomenon of the UO 2 2+ and Th 4+ metal ions are calculated from the van’t Hoff equation ( SE1–10 ). The K d of UO 2 2+ and Th 4+ upon MOFDGAMA at pH 3.0 was obtained by varying the temperature from 293 to 333 K. The ln K d vs 1/ T plot shown in Figure D shows the effect temperature on sorption equilibrium. , Slope and intercept values correspond to − Δ H R & Δ S R respectively from where Δ H & Δ S values were calculated and summarized in Table S2. The negative value of free energy of sorption (Δ G ) (Table S3) and the plot of K d vs T for both UO 2 2+ and Th 4+ in MOFDGAMA have been shown in Figure S7, which depicts that sorption of both the metal ions decreases with the increase in temperature, in turn indicating the exothermic nature of sorption process.…”