Abstract
Liquid Membrane (LM) transport studies of Pu(IV) were investigated in detail using a novel rationally designed conformationally constrained oxatricyclodiamide (OTDA). Detailed parametric investigations were carried out to understand the transport mechanism and to optimize the transport conditions. Efforts were also made to investigate the effect of diluent on the extraction as well as transport of Pu(IV) across the membrane with OTDA. Mass transfer modeling of the transport process was performed and a good agreement between the experimental results and theoretically values was found. The optimized conditions for transport was found to be a PTFE membrane support of 0.45 μm, 4 M HNO3 as feed acidity, 0.1 M OTDA in 30% IDA/n-dodecane as carrier and in the strippant side a mixture of 0.2 M HAN + 0.3 M HNO3. Under the optimized conditions, the permeability co-efficient value was found to be (2.11 ± 0.08) × 10−3 cm/s. Diffusion coefficient value of 1.06 × 10-6 cm2/s was obtained for Pu(IV)-OTDA system.
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