高分子冠醚的离子结合性质及其应用——(Ⅲ)酚醛型高分子冠醚的性能及在盐酸介质中对铀(Ⅵ)的吸附和淋洗

THE ADSORPTION OF U (Ⅵ) IN HYDROCHLORIC ACID MEDIUM ON CRO-WN ETHER PHENOLFORMALDEHYDE RESINS.

摘要: <正> 高分子冠醚是具有选择性配位基的冠醚萃取剂的树脂化形式。这类树脂的离子结合性质与单体极其不同。可以有效地用于各种离子的分离。由E.Blasius合成的酚醛型树脂已用于碱金属、碱土金属、过渡元素、镧系和锕系元素的吸附性能和分离研究。我们用这类树脂作过铀的吸附和有害元素的分离工作,并得到了满意的结果。

Abstract: The adsorption of U(Ⅵ) on poly-dibenzo-l8-crown-6 (PDB-18C6), poly-dibenzo-24-crown-8 (PDB-24C8), poly-bsnzo-15-crown-5 (PB-15C5) in a few inorganic. acid medium is studied. In 6-8N HC1, the adsorption for U(Ⅵ) is quite different from that of U(Ⅳ), but its adsorption may be lowered by adding Fe3+. The elution efficiency decreases with increase of HCl concentration. The stability in a few acid mediums is PDB-24C8>PDB-18C6>PB-15C5. A γ-dosage of up to 5×105 rad has no effect on the stability of the polymers.