Abstract
The role of nitrate ions in uranyl ions transport across TBP-kerosene oil supported liquid membranes (SLM) at varied concentrations of HNO3 and NaNO3 has been studied. It has been found that nitrate ions move faster compared to uranyl ions at the uranium feed solution concentrations studied. The nitrate to uranyl ions flux ratio vary from 355 to 2636 under different chemical conditions. At low uranium concentration the nitrate ions transport as HNO3 · TBP, in addition to as UO2(NO3)2 · 2TBP type complex species. The flux of nitrate ions is of the order of 12.10 · 10−3 mol · m−2 · s−1 compared to that of uranium ions (4.56 · 10−6 mol · m−2 · s−1). The permeability coefficient of the membrane for nitrate ions varies with chemical composition of the feed solution and is in the order of 2.5 · 10−10 m−2 · s−1. The data is useful to estimate the nitrate ions required to move a given amount of uranyl ions across such an SLM and in simple solvent extraction.
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Ashraf Chaudry, M., Noor-Ul-Islam, Naeem-Ur-Rehman et al. Nitrate ion transport across TBP-kerosene oil supported liquid membranes coupled with uranyl ions. Journal of Radioanalytical and Nuclear Chemistry, Articles 189, 207–218 (1995). https://doi.org/10.1007/BF02042599
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DOI: https://doi.org/10.1007/BF02042599