W_(QD)-1沸石离子交换性能的研究

STUDY ON ION EXCHANGE PROPERTIES OF ZEOLITE W QD 1

测定了ＷＱＤ－１沸石在一价碱金属离子混合溶液中的分配系数、饱和交换量和在２５℃时，ＮＨ＋４／Ｋ＋、ＮＨ＋４／Ｎａ＋交换等温线。得出该沸石一价离子选择性序列为：Ｃｓ＋＞Ｒｂ＋＞Ｋ＋＞Ｎａ＋＞Ｌｉ＋，Ｎａ＋／Ｋ＋交换自由焓变ΔＧ（Ｔ，Ｐ）＝－６．７４５ＫＪ／ｍｏｌ。

The distribution coefficient in alkali solution and saturated ion exchange capacity of zeolite W QD 1 are measured and NH + 4/K +, NH + 4/Na + exchange isotherms are determined. The selectivity sequence for univalentions of samples of W QD 1 is: Cs +>Rb +>K +>Na +>Li +, and the free energy of Na +/K + exchange is -6.745 kJ/mol.