| 温敏性水凝胶对金属离子Y3+,UO2+2的浓集分离 |
| 摘要点击 825 全文点击 1252 投稿时间：1999-01-15 |
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| 中文关键词 温敏性水凝胶 Y3+,UO2+2 pH敏感性 浓集 |
| 英文关键词 poly(NIPAAm/AAc)copolymer hydrogels temperature sensitivity Y3+,UO2+2 pH sensitivity concentration |
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| 中文摘要 |
| 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Y3+,UO2+2离子进行浓集分离研究。实验结果表明,凝胶能有效浓集Y3+,UO2+2离子,在pH=1～4范围内,凝胶的溶胀比及对Y3+,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%,凝胶溶胀比的增大有利于对离子的浓集;随溶液中离子浓度的增加,凝胶对离子的浓集率达最大值,水凝胶对Y3+,UO2+2的最大浓集量分别为5.293m g·g-1和36.16m g·g-1.凝胶的表面积也对浓集率有很大影响,同样重量的凝胶,表面积大的凝胶对离子的浓集率大;利用其温敏性,凝胶可重复用于离子的浓集。 |
| 英文摘要 |
| 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. |
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