论文部分内容阅读
本文研究了在 H_2SO_4-(NH_4)_2SO_4介质中,希土和钍(Ⅳ)在涂渍有高分子胺 AmberliteLA-2*(SO_4~(-2))的硅胶柱上的色层行为。这些金属离子的分配系数随酸浓度和盐浓度的增大而减小,在酸性介质里更是这样。在0.025MH_2SO_4-1.0M(NH_4)_2SO_4溶液里,钍(Ⅳ)和三价希土在 AmberliteLA-2柱上的分离系数相当大,足以使它们分开。钍(Ⅳ)、锆(Ⅳ)和铀(Ⅵ)在0.025MH_2SO_4-1.0M(NH_4)_2SO_4介质中,被吸附在色层柱上。当用0.1MH_2SO_4洗提时,钍很容易被洗提下来,而铀(Ⅳ)和锆(Ⅳ)仍被强烈地吸附在柱上。本文提出了三价希土元素,钍(Ⅳ),锆(Ⅳ)和铀(Ⅵ)在 Amberiite LA-2一硅胶柱上进行分离的新方法。用硫酸、盐酸和高氯酸连续洗提,可对四种金属离子进行色层分离。
In this paper, the color behavior of a mixture of quartz and thorium (Ⅳ) on a silica gel column coated with Amberlite LA-2 * (SO_4 ~ (-2)) in H_2SO_4- (NH_4) _2SO_4 media was investigated. The partition coefficient of these metal ions decreases with increasing acid concentration and salt concentration, especially in acidic media. In 0.025MH_2SO_4-1.0M (NH_4) _2SO_4 solution, the separation factor of thorium (Ⅳ) and trivalent earth on Amberlite LA-2 column is quite large enough to separate them. Thorium (Ⅳ), zirconium (Ⅳ) and uranium (Ⅵ) are adsorbed on a chromatographic column in a 0.025MH 2 SO 4 -1.0M (NH 4) 2 SO 4 medium. Thorium is easily eluted when 0.1MH 2 SO 4 is eluted, while uranium (Ⅳ) and zirconium (Ⅳ) are still strongly adsorbed on the column. This paper presents a new method for the separation of trivalent rare earth elements, thorium (Ⅳ), zirconium (Ⅳ) and uranium (Ⅵ) on Amberiite LA-2 silica gel column. With sulfuric acid, hydrochloric acid and perchloric acid continuous elution, four kinds of metal ions can be chromatographed.