caa a22 4500 469111003 CHVBK 20180323133111.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1007/BF02047450 doi (NATIONALLICENCE)springer-10.1007/BF02047450 Bis(2-ethylhexyl)sulfoxide as an extractant for americium(III) from aqueous nitrate media [Elektronische Daten] [J. Shukla, C. Kedari] Solven extraction separation of americium(III) from dilute aqueous nitrate media into n-dodecane by bis(2-ethylhexyl)sulfoxide (BESO) has been investigated over a wide range of experimentgal conditioins. Very poor extractablity of Am(III), necessitated the use of calcium nitrate as the salting-out agent. Effects of certain variables such as acidity, extractant concentration, salting-out agent concentration, organic diluents on the metal extraction by BESO have been examined in detail. By increasing the concentration of BESO in organic phase or calcium nitrate in aqueous phase, nearly quantitative extraction of americium even from moderate acidity is accomplished. Slope analyses applied to Am(III) distribution experiments from acidic nitrate solutions indicate predominant formation of the risolvated organic phase complex, Am(NO3)3)·3BESO for which equilibrium constant is found to be, log Kx=1.99. Extraction behavior of Am(III) has also been evlauated in the presence of several water-miscible polar organic solvents to stuy their possible synergistic effects on its extraction. Extractability of americium increased 5 to 10-fold withi increasing conentration of some of these additives, with maximum enhancement being observed in the presence of acetone or acetonitrile. Recovery of BESO from loaded americium is easily obtained using dilute nitric acid as the strippant. Akadémiai Kiadó, 1992 Shukla J. Radiochemisry Division, Bhab ha Atomic Research Centre, Trombay, 400 085, Bombay, India aut Kedari C. Fuel Reprocessing Division, Bhabha Atomic Research Centre, Trombay, 400 085, Bombay, India aut Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 157/2(1992-03-01), 355-366 0236-5731 157:2<355 1992 157 10967 https://doi.org/10.1007/BF02047450 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02047450 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Shukla J. Radiochemisry Division, Bhab ha Atomic Research Centre, Trombay, 400 085, Bombay, India aut NATIONALLICENCE 700 1- Kedari C. Fuel Reprocessing Division, Bhabha Atomic Research Centre, Trombay, 400 085, Bombay, India aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 157/2(1992-03-01), 355-366 0236-5731 157:2<355 1992 157 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer