温敏性水凝胶对金属离子Y3+,UO2+2的浓集分离

利用合成的ＰＮＩＰＡＡｍ／ＡＡｃ交联共聚温敏性水凝胶分别对水溶液中微量的Ｙ＾２＋，ＣＵ２＾２＋离子进行浓集分离研究。实验结果表明，凝胶能有效浓集Ｙ＾２＋，ＵＯ２＾２＋离子，在ＰＨ＝１～４范围内，凝胶的溶胀比及对Ｙ＾３＋，ＵＯ２＾２＋的浓集率均随ＰＨ的增大而增大，浓集率分别达到８０％和９０％，凝胶溶胀比的增大浓集量分别为５．２９３ｍｇ．ｇ＾－１、３６．１６ｍｇ．ｇ＾－１凝胶的表面积也对浓集率有限大影

Concentration of Y3+,UO2+2 Ions from Aqueous Solution by Temperature Sensitivity Poly (NIPAAm/AAc) Copolymer Hydrogel

It was investigated that concentration of Y³⁺,UO₂⁺² ions in dilute aqueous solution by Poly (NIPAAm/AAc)copolymer hydrogel.It was found that the hydrogel might concentrate Y³⁺,UO₂⁺² ions in weak acid solution efficiently.As pH value rise in aqueous solution,the concentration rate rise up to 80% and 90% for Y³⁺ and UO₂⁺² respectively,which is similar to swelling rate did. Maximum amount of gel conecentrating Y³⁺ and UO₂⁺²are 5.293 mg·g^-1 and 36.16 mg·g^-1 separately.Increasing hydrogel surface area is favorable to concentration.It is possible that hydrogel was used repeatedly.The concentrating mechanism was discussed.