Extraction of tetravalent neptunium isoxazolonates as their TOPO adducts

Verfasser / Beitragende:
[S. Banerjee, P. K. Mohapatra, A. Bhattacharyya, S. Basu, V. K. Manchanda]
Ort, Verlag, Jahr:
2004
Enthalten in:
Radiochimica Acta/International journal for chemical aspects of nuclear science and technology, 92/2/2004(2004-02-01), 95-100
Format:
Artikel (online)
ID: 378941348
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024 7 0 |a 10.1524/ract.92.2.95.27458  |2 doi 
035 |a (NATIONALLICENCE)gruyter-10.1524/ract.92.2.95.27458 
245 0 0 |a Extraction of tetravalent neptunium isoxazolonates as their TOPO adducts  |h [Elektronische Daten]  |c [S. Banerjee, P. K. Mohapatra, A. Bhattacharyya, S. Basu, V. K. Manchanda] 
520 3 |a The extraction behaviour of Np(IV) by 3-phenyl-4-benzoyl-5-isoxazolone (HPBI) in the presence of tri-n-octyl phosphine oxide (TOPO) was investigated from nitric acid medium. The speciation studies, carried out by the slope analysis method, yielded binary species of the type Np(PBI)4 when only HPBI was used as the extractant and ternary species of the type Np(PBI)4·TOPO when both HPBI and TOPO were used as the extractants. The two-phase extraction constant for the binary species (log kex) was calculated to be 10.11±0.03, while that for the ternary species was found to be 17.24±0.05. Thermodynamic parameters for the binary and ternary extraction systems were also determined. Both the binary and ternary extraction systems were found to be highly spontaneous processes with predominant enthalpy stabilization. The very high negative entropy factor suggested contribution of unfavourable steric factors. 
540 |a © 2004 Oldenbourg Wissenschaftsverlag GmbH 
690 7 |a Laboratory techniques, experiments  |2 nationallicence 
690 7 |a Analytical chemistry  |2 nationallicence 
690 7 |a Inorganic chemistry  |2 nationallicence 
700 1 |a Banerjee  |D S.  |4 aut 
700 1 |a Mohapatra  |D P. K.  |4 aut 
700 1 |a Bhattacharyya  |D A.  |4 aut 
700 1 |a Basu  |D S.  |4 aut 
700 1 |a Manchanda  |D V. K.  |4 aut 
773 0 |t Radiochimica Acta/International journal for chemical aspects of nuclear science and technology  |d Oldenbourg Wissenschaftsverlag GmbH  |g 92/2/2004(2004-02-01), 95-100  |x 0033-8230  |q 92:2/2004<95  |1 2004  |2 92  |o ract 
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950 |B NATIONALLICENCE  |P 700  |E 1-  |a Mohapatra  |D P. K.  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Bhattacharyya  |D A.  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Basu  |D S.  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Manchanda  |D V. K.  |4 aut 
950 |B NATIONALLICENCE  |P 773  |E 0-  |t Radiochimica Acta/International journal for chemical aspects of nuclear science and technology  |d Oldenbourg Wissenschaftsverlag GmbH  |g 92/2/2004(2004-02-01), 95-100  |x 0033-8230  |q 92:2/2004<95  |1 2004  |2 92  |o ract 
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