Extraction of U(VI) with poly(ethylene glycol) in two-phase aqueous systems containing various anions
Tóm tắt
The distribution of U(VI) between the phase of poly(ethylene glycol) (PEG) of various molecular weights (1500, 4000, 6000, and polydisperse PEG115) and aqueous phosphate, sulfate, and carbonate solutions was studied at pH 3– 13. With increasing PEG molecular weight, the distribution factor of U(VI) increases. The extraction isotherms of U(VI) at 20°C were obtained. The scattering of laser radiation in U(VI)-containing poly(ethylene glycol) solutions showed no colloid formation. Along with U(VI), the extraction of several other metals with PEG was studied. The mechanisms of extraction of U(VI) with PEG are discussed.
Tài liệu tham khảo
Molochnikova, N.P., Shkinev, V.M., Spivakov, B.F., et al., Radiokhimiya, 1988, vol. 30, no.1, pp. 60–64.
Molochnikova, N.P., Shkinev, V.M., and Myasoedov, B.F., Radiokhimiya, 1995, vol. 37, no.5, pp. 385–397.
Chukhlantsev, V.G. and Stepanov, S.P., Zh. Neorg. Khim., 1956, vol. 1, no.3, pp. 478–484.
Kirgintsev, A.N., Trushnikova, L.N., and Lavrent’eva, V.G., Rastvorimost’ neorganicheskikh veshchestv v vode: Spravochnik (Solubility of Inorganic Substances in Water: Handbook), Leningrad: Khimiya, 1972, p. 181.
Zvarova, T.I., Shkinev, V.M., Vorob’eva, G.A., et al., Zh. Anal. Khim., 1988, vol. 43, no.1, pp. 37–45.
Stoyanov, E., Smirnov, I., Varnek A., and Wipff, G., in EURADWASTE 1999: Radioactive Waste Management. Strategies and Issues, Luxembourg: European Communities, 2000, pp. 519–522.
Spitsyn, V.I., Murav’eva, I.A., Nemkova, O.G., and Gulia, V.G., Issledovaniya v oblasti khimii urana (Studies in Uranium Chemistry), Spitsyn, V.I., Ed., Moscow: Mosc. Gos. Univ., 1961, pp. 233–239.
Murav’eva, I.A., Nemkova, O.G., Cherkasova, R.P., and Orlova, A,S., Issledovaniya v oblasti khimii urana (Studies on Uranium Chemistry), Spitsyn, V.I., Ed., Moscow: Mosk. Gos. Univ., 1961, pp. 240–247.
Gromov, B.V., Vvedenie v khimicheskuyu tekhnologiyu urana (Introduction to Uranium Technology), Moscow: Atomizdat, 1978.