Abstract
A nonstationary oscillating system consisting of two extractors separated by a continuous liquid membrane is examined, including the effects of the pumping rate of the organic phase of the membrane and of the acid concentration. The time dependences of the enrichment factors of the aqueous and organic phases (Pr/Nd) are studied. The enrichment factor depends on the low-frequency oscillations of the redox potential (high-frequency oscillations were low-frequency-modulated). The HNO3 concentration optimal for Nd - Pr separation is determined. The enrichment factor of the aqueous phase (Pr/Nd) increases with increasing rate of pumping of the liquid membrane between the extractors. The 142Ce/140Ce ratios in the aqueous phase of both extractors are measured.
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