<報文>乳化型液体膜へのウランの抽出と脱乳化による回収

概要

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Uranium extraction by liquid surfactant membranes containing bis (2-ethylhexyl) hydrogenphosphate (DEHPA) as a mobile carrier has been studied in connection with the stability of water-in-oil (W/O) emulsion. The uranium concentration in the external aqueous phase decreased as ln ([U]_t/[U]_0)=-k_<obs>t by extraction into the emulsion phase. The apparent rate constant (k_<obs>) increased with increases in carrier concentrations and in external pH values, while it varied slightly with internal acid concentrations. The emulsion globules were demulsified by a high voltage electrostatic method in order to recover the extracted uranium. The distributions of uranium among the external aqueous phase, the liquid membrane phase and the internal aqueous phase were investigated in connection with equilibrium in liquid-liquid extraction. The extracted uranium was efficiently recovered leaving little remnants in the liquid membrane phase.
東北大学の論文
1984-09-25