Thermodynamic modeling of metal-ligand interactions in high ionic strength NaCl solutions: the Ni2+-oxalate system

Verfasser / Beitragende:
[M. Borkowski, Gregory R. Choppin, Robert C. Moore]
Ort, Verlag, Jahr:
2003
Enthalten in:
Radiochimica Acta/International journal for chemical aspects of nuclear science and technology, 91/3/2003(2003-03-01), 169-172
Format:
Artikel (online)
ID: 378881906
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024 7 0 |a 10.1524/ract.91.3.169.19978  |2 doi 
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245 0 0 |a Thermodynamic modeling of metal-ligand interactions in high ionic strength NaCl solutions: the Ni2+-oxalate system  |h [Elektronische Daten]  |c [M. Borkowski, Gregory R. Choppin, Robert C. Moore] 
520 3 |a Stability constants for the 1:1 and 1:2 complexes of Ni(II)+Oxalate have been determined using solvent extraction. Data collected in 0.3m to 5.0m NaCl aqueous solutions at 20.0±0.1°C yielded values of log β101 ranging from 3.71 to 3.98(±0.06) and of log β102 from 6.44 to 6.95(±0.06), which agree well with values from the literature. The data were analyzed by the Pitzer model with a value of μ0/RT=-17.47 for the 1:1 complex calculated from the data and literature values. A single neutral-ion interaction parameter λNiOx-Cl=-0.179 was used to describe the ionic strength dependence of the 1:1 complex. For the 1:2 complex, a value for μ0/RT=-11.31 and the Pitzer parameters values, β0NiOx₂²⁻-Na⁺=-0.0644 and β1NiOx₂²⁻-Na⁺=0.8545, were determined. These standard chemical potential values are based on a model for oxalate deprotonation reported earlier. 
540 |a © 2003 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 Borkowski  |D M.  |4 aut 
700 1 |a Choppin  |D Gregory R.  |4 aut 
700 1 |a Moore  |D Robert C.  |4 aut 
773 0 |t Radiochimica Acta/International journal for chemical aspects of nuclear science and technology  |d Oldenbourg Wissenschaftsverlag GmbH  |g 91/3/2003(2003-03-01), 169-172  |x 0033-8230  |q 91:3/2003<169  |1 2003  |2 91  |o ract 
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950 |B NATIONALLICENCE  |P 700  |E 1-  |a Borkowski  |D M.  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Choppin  |D Gregory R.  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Moore  |D Robert C.  |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 91/3/2003(2003-03-01), 169-172  |x 0033-8230  |q 91:3/2003<169  |1 2003  |2 91  |o ract 
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949 |B NATIONALLICENCE  |F NATIONALLICENCE  |b NL-gruyter