研究论文
张剑波.温敏性线型共聚物对金属离子的吸附[J].环境科学学报,1999,19(4):390-393
温敏性线型共聚物对金属离子的吸附
- Absorptivity of temperature sensitivity linear copolymers to metal ions in dilute aqueous solution
- 摘要：利用合成的NIPAAmAAc温敏性线型共聚物研究了其对无机金属离子的吸附性能,以期应用于水污染的治理。结果表明其有明显的浓集效果,在pH=4时,对Y3+、Er3+和UO22+的浓集率分别达到84%、65%和56%,相应的浓集量分别为11.2mg·g-1、4.45mg·g-1和11.3mg·g-1,并讨论了影响浓集的条件和吸附机理。
- Abstract：Absorptivity of linear copolymers to metal ions was studied in dilute aqueous solution.The conditions of concentration were given and the mechanism was discuses.The concentration effect of poly(NIPAAm-co-AAc) was higher than that of polyNIAAm,which was found not only for Er3+ but for UO22+and Cr(VI).Because polyNIPAAm is nonionizing polymer which was not influenced by pH.On the contrary,ionization of poly(NIPAAm-co-AAc) took place at high pH.The hydrolysis of these metals was suggested in the pH range of 2 to 4.Concentration effect of copolymer for UO22+was found at pH 3.The concentration yield increased rapidly with a little increase in pH,because six-element-ring compound of COOH with UO22+was formed.The concentration effect was observed for Er3+,UO22+and Cr(VI).
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