Extraction of tetravalent berkelium with neutral organophosphorus compounds

Journal Article · · Sov. Radiochem. (Engl. Transl.); (United States)

OSTI ID:6766503

Malikov, D A; Milyukova, M S; Myasoedov, B F; Kuzovkina, E V

Extraction of tetravalent berkelium, Bk(IV), with neutral organophosphorus compounds from HNO/sub 3/, HCl, and H/sub 2/SO/sub 4/ solutions as well as the effect of the concentration of the acids and extractants, the nature of the solvents, and other factors on the Bk(IV) distribution coefficients was studied. It was shown that tributyl phosphate (TBP), trioctylphosphine oxide (TOPO), and triphenylphosphine oxide (TPPO) extract Bk(IV) quantitatively under specific conditions. The optimal medium for effective Bk(IV) extraction with neutral organophosphorus compounds are HNO/sub 3/ solutions. TOPO is the best among all the extractants studied. The acid concentration range in which berkelium extraction is quantitative is wider for TOPO than for TBP and TPPO in all organic solvents. The mechanism of Bk(IV) extraction with neutral organophosphorus compounds from NHO/sub 3/ solutions was studied. It was established that Bk(IV) can be extracted with TBP, TOPO, and TPPO as the berkelium tetranitrate disolvate Bk(NO/sub 3/)/sub 4/ x 2S, where S stands for TBP, TOPO, and TPPO.

• OSTI ID: 6766503
• Journal Information: Sov. Radiochem. (Engl. Transl.); (United States), Journal Name: Sov. Radiochem. (Engl. Transl.); (United States) Vol. 25:3; ISSN SVRDA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
ACTINIDE COMPLEXES
ACTINIDES
BERKELIUM
BERKELIUM COMPLEXES
BUTYL PHOSPHATES
COMPLEXES
ELEMENTS
ESTERS
EXTRACTION
HYDROGEN COMPOUNDS
INORGANIC ACIDS
METALS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PHOSPHORIC ACID ESTERS
SEPARATION PROCESSES
SOLVENT EXTRACTION
TBP
TOPO
TPO
TRANSPLUTONIUM ELEMENTS
TRANSURANIUM COMPLEXES
TRANSURANIUM ELEMENTS
VALENCE