High efficient and selective removal of U(VI) from lanthanides by phenanthroline diamide functionalized carbon doped boron nitride

Enhanced Versatility in Thorium Removal: Mesoporous Silica-Coated Magnetic Nanoparticles Functionalized by Phenanthroline Diamide as a Selective Adsorbent

“…The low content of DAPhen attached to the surface of the magnetic nanocomposite resulted in weak signals, making it difficult to detect. However, FTIR confirmed the attachment of DAPhen on the magnetic nanocomposite surface to some extent . These characteristic peaks clearly indicate successful wrapping of SiO 2 on Fe 3 O 4 nanoparticles and successful introduction of DAPhen groups into Fe 3 O 4 and SiO 2 @Fe 3 O 4 .…”

“…41 DAPhen groups have been utilized in functionalizing carbon-doped boron nitride to achieve the selective adsorption of actinides over other competing metal ions, demonstrating excellent adsorption ability even under acidic conditions. 14 Given the highly selective nature of DAPhen for actinides over lanthanides, it shows great promise in the functionalization of SiO 2 @Fe 3 O 4 for achieving the selective adsorption and removal of Th(IV).…”

“…In this field, common separation methods include solvent extraction and adsorption. Under severe radioactive circumstances, solvent extraction is straightforward to execute, continuous, and automated, but its use is limited by the sluggish mass-transfer rate. − Adsorption is seen as a viable method for removing trace actinides from radioactive waste liquids because it has a low energy need, is simple to use, and produces little secondary waste. − Numerous adsorbents have been tested for removing heavy metals (including Th­(IV)), such as activated carbon, mesoporous silica, and naturally occurring lignocellulosic substrates that are inexpensive. Although these materials are widely accepted and established processes with good yield, their use has several drawbacks.…”

“…Shi et al have recently reported on the development of a novel tetradentate ligand called 2,9-diamide-1,10-phenanthroline (DAPhen), which has demonstrated remarkable selectivity for actinides over lanthanides in highly acidic solutions using solvent extraction . DAPhen groups have been utilized in functionalizing carbon-doped boron nitride to achieve the selective adsorption of actinides over other competing metal ions, demonstrating excellent adsorption ability even under acidic conditions . Given the highly selective nature of DAPhen for actinides over lanthanides, it shows great promise in the functionalization of SiO 2 @Fe 3 O 4 for achieving the selective adsorption and removal of Th­(IV).…”

Porous g-C3N4 modified with phenanthroline diamide for efficient and ultrafast adsorption of palladium from simulated high level liquid waste

“…The protonation degree of the DAPhen groups increased with the increase of nitric acid concentration, causing the depressed adsorption ability of CN-DAPhen for metal ions, which was why the adsorption capacities of CN-DAPhen for the metal ions decreased as the concentration of nitric acid increased. 85 On the other hand, Pd( ii ) occupied more unprotonated DAPhen groups at a higher concentration of nitric acid owing to the strongest affinity, causing the increased S under the high concentration of nitric acid.…”