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研究了Ce4+在以2-(二乙基己基)磷酸(P204)为流动载体,煤油和P204的混合溶液作为膜溶液,膜溶液和解析剂H2SO4溶液组成更新相的反萃更新中空纤维液膜(SRHFLM)中的提取行为;考察了料液酸度、更新相H2SO4浓度、膜溶液与H2SO4溶液体积比、不同载体浓度对Ce4+提取的影响,得出了以下Ce4+最优提取条件:更新相H2SO4溶液浓度2.50mol/L,膜溶液与H2SO4溶液体积比2:1,载体浓度控制在0.200mol/L,料液相酸度为0.05mol/L。在最优分离条件下,当Ce4+的初始浓度为1.00?10-4mol/L时,Ce4+在45min时提取率达到92.2%。最后提出了Ce4+在SRHFLM中的学渗透系数动力学模型。
The effect of Ce4 + on the regeneration of hollow fiber membranes with a mixture of 2 - (diethylhexyl) phosphoric acid (P204) as mobile carrier, kerosene and P204 as the membrane solution, and the membrane solution and H2SO4 solution SRHFLM). The effects of feed acidity, phase concentration of updated H2SO4, volume ratio of membrane solution to H2SO4 solution, and different carrier concentrations on the extraction of Ce4 + were investigated. The optimal extraction conditions for Ce4 + 2.50mol / L, membrane solution and H2SO4 solution volume ratio of 2: 1, carrier concentration control at 0.200mol / L, liquid phase acidity of 0.05mol / L. Under the optimal conditions, the extraction rate of Ce4 + reached 92.2% at 45 min when the initial concentration of Ce4 + was 1.00? 10-4 mol / L. Finally, the kinetic model of permeability of Ce4 + in SRHFLM was proposed.