Highly amidoxime utilization ratio of porous poly(cyclic imide dioxime) nanofiber for effective uranium extraction from seawater

Alginate-based supermacroporous hydrogels fabricated by cryo-polymerization for uranium extraction from seawater

“…The N 1s spectrum before adsorption exhibits three peaks at 401.55 eV, 400.08 eV, and 399.12 eV, which correspond to the characteristic peaks of -CvN-, -NH 2 , and -NHfunctional groups, respectively. 56 After adsorption, the characteristic peaks of -CvNshifted from 401.55 eV to 401.60 eV, while the characteristic peak of -NH 2 shifted from 400.08 eV to 400.16 eV. Notably, the characteristic peak of -NHat 399.12 eV did not shift before and after adsorption.…”

Uranium extraction from seawater: material design, emerging technologies and marine engineering

“…Only a small portion (<1%) of the ligands participate in the coordination to uranyl ions. 103 Thus, scientists have urged recently to address the huge gap between the theoretical DOG and realistic utilization ratio of the ligands by examining their accessibility and the kinetic issues. More discussion about the influence of the accessibility of binding sites on the uranium adsorption ability of the adsorbents will be presented in Section 3.1.2.…”

Amidoxime Functional EVOH Nanofibers for Uranium Extraction from Seawater

“…Following the grafting of PAN and subsequent amidoximation, PAN nanoparticles were successfully synthesized and integrated onto PVDF NFs. This integration combined the flexibility and strength of PVDF NFs with the affinity and selectivity of AO, resulting in an improved AO utilization ratio and an enhanced adsorption capacity . However, the chemical inertia of PVDF determines that its functional material must be modified by two-step grafting, which increases the complexity of the material preparation process of adsorbents and the manufacturing cost.…”