Cu(Ⅱ)、Co(Ⅱ)、Ni(Ⅱ)、Zn(Ⅱ)、Cd(Ⅱ)非有机溶剂液—液萃取行为的研究

Studies on the liquid-liquid extraction behaviour of Cu-(Ⅱ), Co(Ⅱ),Ni(Ⅱ),Zn(Ⅱ),.Cd(Ⅱ)without usual organic solvents

本文研究了PEG—EBT—(NH_4)_2SO_4体系对Cu(Ⅱ)、Co(Ⅱ)、Ni(Ⅱ)、Zn(Ⅱ)、Cd(Ⅱ)的非有机溶剂萃取行为。指出在pH7～10(NH_3H_2O～NH_3Cl)的水溶液中,有(NH_4)_2SO_4存在下,Cu(Ⅱ)、Co(Ⅱ)、Ni(Ⅱ)、Zn(Ⅱ)可被PEG相几乎完全萃取,而Cd(Ⅱ)基本上不被萃取。从而获得了(d(Ⅱ)与Cu(Ⅱ)、Co(Ⅱ)、Ni(Ⅱ)、Zn(Ⅱ)混合离子的定量分离。

In PEG-EBT- (NH4) 2SO4 system the liquid-liquid extraction belavicur of Cu(II),Co(II),Ni( II ),Zn( II )andCd( II )withoutusualorganicsolventswasinvesti-gated, we found that.Cu( II ), Co( II ), Ni( II ),Zn( II ) were almost extracted by PEG phase while Cd( II ) was not extracted in thd water solutions of NH4 H2O-NH4Cl(pH = 7~10) and (NH4) 2SO4, So that Cd( I ) was quantiatative separated from mixed solutions of Cu( II ),Co( II ),Ni(II),Zn(II).Cd(II)ions.