以磷酸三丁脂为载体的乳状液膜迁移、分离稀土元素的研究──Sm（Ⅲ）与常见阳离子的分离

Study on Transport and Separation ofRare Earth Through the Emulsion LiquidMembrane of TBP-Span80-Oxylene──Sep-aration of Sm(Ⅲ) from Common Cations

用磷酸三丁酯－Ｓｐａｎ８０－二甲苯乳状液膜体系迁移Ｓｍ（Ⅲ）的研究表明，在确定的条件下，可以快速并完全迁移Ｓｍ（Ⅲ）。许多常见离子不能在此条件下通过液膜迁移，故可从含有Ｆｅ￣（２＋）、Ｃｏ￣（２＋）、Ｎｉ￣（２＋）、Ｃｕ￣（２＋）Ｚｎ￣（２＋）、Ｃｄ￣（２＋）、Ｍｎ￣（２＋）等离子混合液中分离出Ｓｍ（Ⅲ），分离效率高。

he transport behaviour of Sm￣(3+)through the emulsion liquid metnbrane sys-tem of TBP-Span80-oxylene has been stud-ied. The transport conditions of Sm￣(3+) withhigh efficiency and high speed are as fol-lows; membrane phase; 0. 040mol/L TBP +3%(W/V) Span80 + oxylene:outer phasewith 2. 5mol/L HNO_3 as medium; innerphase 0. 10mol/L Na_2S_2O_3.The transportrate of Sm￣(3+) in 10min is above 94%. In thiscase, many coexisiting ions,such as Cu￣(2+)、Co￣(2+)、Ni￣(2+)、Fe￣(2+)、Zn￣+、Cd￣(2+)、Mn￣(2+) etc.can-not transport through this emulsion liquidmembrane So Sm￣(3+) can be separated fromthese ions satisfactorily.