Mutual Effect of Mineral Salt and Amino Acid in Their Sorption by Heterogeneous Ion-Exchange Membranes

Kharina, Anastasiia; Eliseeva, T. V.; Селеменев, В. Ф.

doi:10.1134/s0036024421100125

Cited by 3 publications

(3 citation statements)

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“…Confirmation of an increase in the hydrophobicity of the ion-exchange membrane surface in contact with the solution containing a mineral salt and a heterocyclic amino acid, compared with the individual solution of a mineral salt, is presented in [ 14 ]. An increase in the water contact angle for the membranes operating in solutions containing heterocyclic amino acids was revealed.…”

Section: Resultsmentioning

confidence: 99%

“…The fluxes of the heterocyclic amino acids through the MK-40 cation-exchange membrane reached higher values than through the MA-41 anion-exchange membrane ( Figure 6 ). The difference in amino acids fluxes through these membranes could be explained, in particular, by the higher capacity of the MK-40 cation-exchange membrane (in comparison with MA-41) for amino acids [ 14 ] (and for the mineral ions [ 44 ]). The maximum of the dependences corresponded to the limiting current density.…”

Section: Resultsmentioning

confidence: 99%

“…However, studies of the transport and current-voltage, structural, and other characteristics of ion-exchange membranes in the electrodialysis of solutions containing a heterocyclic amino acid are represented by only a few works [ 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

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Current-Voltage and Transport Characteristics of Heterogeneous Ion-Exchange Membranes in Electrodialysis of Solutions Containing a Heterocyclic Amino Acid and a Strong Electrolyte

Eliseeva

Kharina

2023

Membranes

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The alterations in current-voltage and transport characteristics of highly basic and strongly acidic ion-exchange membranes, during the electrodialysis of solutions containing a heterocyclic amino acid and a strong electrolyte, were studied. An increase in the catalytic activity of the water splitting process at the surface of heterogeneous MK-40 and MA-41 membranes upon prolonged contact with proline and tryptophan solutions was found. A significant effect of electroconvection on the components mass transfer through the cation-exchange membrane in the intensive current mode of electrodialysis was revealed for the solution containing a heterocyclic amino acid along with mineral salt (NaCl). This led to a reduction in the length of the “plateau” of the membrane’s current-voltage characteristics, in comparison with the characteristics for an individual sodium chloride solution with the same concentration. The changes in the characteristics of the studied ion-exchange membranes caused by contact with solutions containing heterocyclic amino acids during electrodialysis were reversible when applying electrochemical regeneration (cleaning in place) using the overlimiting current mode, corresponding to the region of facilitated transport for these ampholytes.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%