Sorption of pyridine-3-carboxylic acid by the Dowex-50 sulfonic cation-exchange resin in the NiII and CuII forms

The equilibrium distribution of components between aqueous solutions containing pyridine-3-carboxylic acid and Dowex-50 sulfonic cation-exchange resin in the Ni II or Cu II form was studied. The counterionic composition of the sulfonic cation-exchange resin was determined by solving a system of equa...

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Bibliographic Details
Published in:Russian chemical bulletin 2021, Vol.70 (8), p.1421-1428
Main Authors: Altshuler, H. N., Malyshenko, N. V., Nekrasov, V. N., Altshuler, O. H.
Format: Article
Language:English
Subjects:
Acids
Aqueous solutions
Carboxylic acids
Cation exchanging
Cationic polymerization
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
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Infrared spectroscopy
Inorganic Chemistry
Ions
Material balance
Mathematical analysis
Metal ions
NMR spectroscopy
Organic Chemistry
Resins
Selectivity
Sorption
Spectrum analysis
Transition metals
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Summary:The equilibrium distribution of components between aqueous solutions containing pyridine-3-carboxylic acid and Dowex-50 sulfonic cation-exchange resin in the Ni II or Cu II form was studied. The counterionic composition of the sulfonic cation-exchange resin was determined by solving a system of equations for the selectivity coefficients of the binary ion exchanges and the material balance equation. The experimental and calculated results for the sorption processes and the data of FT-IR spectroscopy and 13 C CPMAS NMR spectroscopy of solid samples showed that pyridine-3-carboxylic acid in the Dowex-50 sulfonic cation-exchange resin is presented by the protonated [H 2 L] + form or [CuHL] 2+ cations. High distribution coefficients suggest that pyridine-3-carboxylic acid and metal cations (Cu II , Ni II ) can be concentrated in the Dowex-50 sulfonic cation-exchange resin. The Dowex-50 sulfonic cation-exchange resin appears to be useful as a container for drugs based on pyridine-3-carboxylic acid and divalent transition metal cations, such as Cu II and Ni II .
ISSN:1066-5285
1573-9171
DOI:10.1007/s11172-021-3235-y