【摘要】 本文研究了PEG—EBT—（NH₄）₂SO₄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（NH₃H₂O～NH₃Cl）的水溶液中,有（NH₄）₂SO₄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。更多还原

【Abstract】 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.更多还原