1987 Volume 13 Issue 6 Pages 795-800
Chelating resins containing amide oxime group were synthesized by radiationinduced graft polymerization. The amount of the amide oxime groups was controlled below about 0.1 mol per kg of base polymer.
The adsorption equilibrium of uranium from seawater on this resin was investigated. It was suggested that two neighboring amide oxime groups on the grafted chain captured one uranyl ion, and that single amide oxime ligand had little capacity for the adsorption of uranium. The adsorption equilibrium was correlated by a Langmuir-type equation. The content of neighboring amide oxime groups was 0.406×10-3 mol per kg of base polymer, which corresponded to 0.39% of the total amount of amide oxime groups.
The apparent stoichiometric stability constant for the complex of uranyl ion with the neighboring amide oxime groups in seawater was calculated to be 10-21.7.
