天然高岭石类粘土矿物对Sc^（3＋）、Th^（4＋）的吸附

Adsorption of Sc￣(3+)、Th￣(4+) Ions by Natural Kaolinite Clay Mineral

研究了两种天然高岭石类粘土矿物样品对Ｓｃ３＋、Ｔｈ~４＋离子的吸附等温线，用最小二乘法的关联结果表明，可以用Ｌａｎｇｍｕｉｒ、Ｆｒｅｕｎｄｌｉｃｈ和Ｔｅｍｋｉｎ吸附等温线方程来描述。粘土对Ｓｃ~３＋、Ｔｈ~４＋的吸附表现出典型的电性交换吸附特征。且对Ｓｃ~３＋具有更强的吸附能力。证明该类粘土不仅可以用来吸附富集Ｓｃ~３＋、Ｔｈ~４＋，而且可以选择适当浓度的酸溶液作淋洗剂来进行Ｓｃ~３＋、Ｔｈ~４＋的离子交换分离。

In this paper,the adsorption isotherms of Sc3+,Th4+ ions by two typical natural kaolinite clay mineral samples were investigated. It was found that the results could be related with Langmuir, Freundlich or Temkin isotherm formulas. And then some characteristics of interaction between Sc3+, Th4+and kaolinite clay mineral were discussed with the parameters in their isothem formulas.