三异辛胺-Span80-甲苯乳状液膜迁移分离Mo(Ⅵ)

Separation Study of Molybdenum Through Emulsion Liquid Membrane with Triisooctylamine-Sorbital Monooleate-Methylbenzene System

研究了三异辛胺 Span 80 甲苯乳状液膜迁移、分离Mo(Ⅵ )的行为。确定了最佳迁移、分离条件 :当膜相组成为 0 0 2mol/LTOA +3% (W/V)Span80 ,内相为 0 0 5 0mol/LNaOH ,外相为 5 0× 10 -3 ～ 2 0× 10 -2 mol/LHCl时 ,实现了Mo(Ⅵ )与Fe(Ⅱ )、Co(Ⅱ )、Ni(Ⅱ )、Mn(Ⅱ )、Zn(Ⅱ )、Cd(Ⅱ )、Cu(Ⅱ )、Pb(Ⅱ )

A study of the transport of Mo(Ⅵ) ions through a triisooctylamine(TIOA) sorbital monooleate(Span 80) methylbenzene liquid membrane was performed with varying concentration of HCl, TIOA,Span 80 and NaOH in the feed, membrane and stripping solutions. Maximum transport was observed at 0 020 mol/L TIOA, 3% Span 80(w/v), 5 0×10 -3 ～2 0×10 -2 mol/L HCl and 0 050 mol/L NaOH. With this system, Mo(Ⅵ) can be completely separated from Fe 3+ ?Co 2+ ?Ni 2+ ?Mn 2+ ?Zn 2+ ?Cd 2+ ?Cu 2+ ?Pb 2+ . The transport mechanism of these metal ions through the membrane was discussed.