Stability of metal uncharged ligand complexes in ion exchangers. Part 1.—Quantitative characterization and thermodynamic basis
- 1 January 1977
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
- Vol. 73, 1297-1301
- https://doi.org/10.1039/f19777301297
Abstract
The thermodynamics of the formation of metal uncharged ligand complexes in ion exchangers is analysed in terms of an extension of the Bjerrum complex formation function. A new method is presented for obtaining the stability of adsorbed complexes which is based upon the measurement of the ion exchange adsorption of the metal complex vis-à-vis the aqueous metal ion. Quantitative relations between excess adsorption affinity and stability enhancement are presented; it is shown that absolute values of stability constants, determined by either one of the two complementary methods, are dependent upon the assumption of a unit partition coefficient for the uncharged ligand between the bulk solution and the ion exchanger.Keywords
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