二元及三元离子交换平衡的研究——Ⅱ.UO_2~(2+)-Na~+-H~+三元离子交换平衡

BINARY AND TERNARY ION EXCHANGE EQUILIBRIA——II. UO_2~(2+) -Na~+-H~+ TERNARY CATION EXCHANGE EQUILIBRIA

摘要: 本文采用国产强酸性阳离子交换树脂001×7,以动态实验方法测定了UO_2~(2+)-Na~+-H~+三元离子交换的平衡数据,并将UO_2~(2+)-Na~+-H~+三元离子交换体系中,任何两种离子的平衡数据与相应的UO_2~(2+)-H~+、UO_2~(2+)-Na~+及Na~+-H~+纯二元交换体系中的平衡数据作了比较。此外,还利用这三对离子的二元交换平衡数据推算了相应的三元交换的平衡数据。推算结果令人满意。对于多元离子交换反应的热力学也作了初步探讨。

Abstract: Experimental date are reported for the ion exchange equilibria of the ternary system UO522+-Na+-H+ on a strong acid cation exchange resin at 25℃. It is found that the equilibria for any two ions are essentically the same in binary and ternary mixtures, as previously obtained for Cu2t-Na+-H+ and Ca2+-Na+-H+ ternary systems.An attempt has been made to predict ternary exchange data. The predictions of the ternary system UO22+-Na+-H+ based solely on the binary data are consistent with the experimental data for this system.The thermodynamic theory of multicomponent exchange equilibria is developed.