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以二 (2 -乙基己基 )磷酸 (HDEHP)为载体 ,考察了搅拌速度、温度、石蜡及表面活性剂对大块液膜迁移铕离子的影响 ,获得了各种实验条件下的表观反应速率常数 ,萃取和反萃取的表观反应活化能分别为 1 0 .7kJ/mol和 2 9.2kJ/mol.结果表明 ,萃取过程扩散为控速步骤 ,反萃取过程化学反应亦为控速步骤 ,Eu(Ⅲ )离子的跨膜迁移过程可以以两个串联的准一级不可逆过程进行描述 .
The effects of stirring speed, temperature, paraffin and surfactant on the migration of europium ions in bulk liquid film were investigated with two (2 - ethylhexyl) phosphoric acid (HDEHP) as carrier. The apparent reaction under various experimental conditions The apparent activation energies of rate constant, extraction and back extraction were 10.7 kJ / mol and 9.22 kJ / mol, respectively. The results showed that the extraction process was diffusion-controlled and the chemical reaction in the stripping process was also a rate- The transmembrane migration of Eu (Ⅲ) ions can be described by two series of quasi-first order irreversible processes.