Poly(amidoamine) Dendrimer Functionalized Carbon Nanotube for Efficient Sorption of Trivalent f‐Elements: A Comparison Between 1^st And 2^nd Generation

Abstract

Poly(amidoamine) dendrimer functionalized carbon nano tubes were synthesized, characterized and used for the sorption of americium from aqueous acidic waste solution. The sorption of Am3+ has been found to take place through pseudo second order kinetics with the rate constants of 8.61E‐05 and 5.38E‐05 mg g−1 min−1for 1st and 2nd generation, respectively, followingLangmuir isotherm. The MWCNT‐PAMAMG1 and MWCNT‐PAMAMG2 have high radiolytic stability. The stripping study revealed that EDTA can be effectively used for almost quantitative back extraction of metal ion from both generation of dendrimer. Luminescence investigation revealed the presence of single species with no inner sphere water molecule. The 1st generation dendrimer complex was found to be more asymmetric compared to the 2nd generation. The analysis of Judd Offelt parameters and evaluation of photo‐physical properties were carried out to understand the complexation of Am3+ with these sorbents.

Highly Efficient Extraction Chromatography Resins Containing Dendrimers with DGA Groups in Ionic Liquid for Actinide Uptake

“…This interaction is suggested to be on the line of the solvent extraction equillibria where metal–ligand complexation is the key to metal ion extraction . Analogous sorption isotherm studies are reported in the literature where functionalized carbon naotubes have been used. , …”

“…26 Analogous sorption isotherm studies are reported in the literature where functionalized carbon naotubes have been used. 45,46 Column Studies. Column experiments were performed with a feed solution containing 100 mg/L Eu(NO 3 ) 3 spiked with 152,154 Eu tracer.…”

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

“…Obtained kinetics data were fitted into three different kinetics models: Lagergren first order ( SE1 ), pseudo-second order ( SE2 ), and intraparticle diffusion ( SE3 ) (Figures S1–S3). − Regression coefficient analysis showed that sorption kinetics fits best in the pseudo-second order model. The sorption isotherm shown in Figure C describes the maximum sorption capacity for UO 2 2+ ≈ 193 mg g –1 and Th 4+ ≈ 227 mg g –1 .…”