OTS修饰的微流控层流系统萃取铀

Efficient Extraction of Uranium(Ⅵ) by Laminar Flow Microfluidic System Modified With OTS

摘要: 十八烷基三氯硅烷(OTS)能够选择性修饰通道，保证层流的稳定进行，萃取过程中两相液体自动分相，便于分析。20%磷酸三丁酯 (TBP)-氢化煤油萃取剂能够从3 mol/L HNO₃中高效萃取硝酸铀酰，当硝酸铀酰质量浓度为1~5 g/L时，单次萃取效率均高达90%以上，接触时间仅为37 s。因此，微流控层流萃取技术在核素的快速高效分离与元素萃取等领域有着广泛的应用前景。

Abstract: The laminar flow extraction of uranium(Ⅵ) by microfluidic has been studied. Two-phase liquid can be separated automatically by selective modification in order to analyze using octadecyltrichlorosilane. Above 90% uranium can be extracted by 20%TBP-hydrogenated kerosene from 3 mol/L HNO₃ in microchannel. Furthermore, it is expected that the efficient microfluidic extraction system can be used in the separation and extraction of radionuclides.