磷酸三丁酯-Span80-二甲苯乳状液膜迁移、富集稀土元素La(Ⅲ)的研究

Study on Transport and Enrichment of La(Ⅲ) by the Emulsion Liquid Membrane of TBP-Span80-oxylene

用ＴＢＤ－Ｓｐａｎ８０－二甲苯乳状液膜体系研究了Ｌａ３＋的迁移行为，确定了完全、快速迁移Ｌａ３＋的条件．在该条件下，能够使Ｌａ３＋从常见过渡元素Ｆｅ３＋、Ｃｏ２＋、Ｎｉ２＋、Ｃｕ２＋、Ｃｄ２＋、Ｍｎ２＋、Ｚｎ２＋等离子的混合液中得到完全分离．

The transport behaviour of La(Ⅲ) through the emulsion liquid membrane system of TBP-Span80-Oxylene has been studied.The transport and enrichment condition of La(Ⅲ) are as follows: membrane phase:0.04 mol/L TBP- 3% (w/v) Span80-Oxylene; outphase: with 3.0 mol/L HNO 3 as medium: inner phase: 0.15 mol/L Na 2S 2O 3. The transport rate of La(Ⅲ) in 10 minutes is above 98%.In this case ,many coexisiting ions, such as Cu 2+ ,Co 2+ ,Ni 2+ ,Fe 3+ ,Cd 2+ ,Mn 2+ etc, can not be transported through this emulsion liquid membrane. So La(Ⅲ) can be separated from these lons satisfactorily.