Network Derivation of Liquid Junction Potentials in Single-Membrane System

• Published in: Membranes (Basel) Vol. 14; no. 6; p. 140
• Main Authors: Ślęzak, Andrzej, Grzegorczyn, Sławomir M.
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 01.06.2024; MDPI
• Subjects: Bacterial infections; Cellulose acetate; Coupling coefficients; Dissipation; Electrolytes; Energy conversion; Energy dissipation; Entropy; Force and energy; Formalism; Free energy; Fuel cell industry; Hemodialysis; Internal energy; internal energy conversion; Kedem–Katchalsky–Peusner equations; Membrane processes; membrane transport; Membranes; Nonequilibrium thermodynamics; Permeability; Peusner transport coefficients; polymeric membrane; Polymers; S entropy; Sodium chloride; Thermodynamics; Transformations (mathematics); Transport processes; Belgium; Kedem–Katchalsky–Peusner equations; membrane transport; Peusner transport coefficients; S entropy; polymeric membrane; internal energy conversion
• ISSN: 2077-0375; 2077-0375
• DOI: 10.3390/membranes14060140

Peusner’s network thermodynamics (PNT) is one of the more important formalisms of nonequilibrium thermodynamics used to describe membrane transport and the conversion of the internal energy of the system into energy dissipated in the environment and free energy used for the work involved in the transport of solution components in membrane processes. A procedure of transformation the Kedem–Katchalsky (K-K) equations for the transport of binary electrolytic solutions through a membrane to the Kedem–Katchalsky–Peusner (K-K-P) equations based on the PNT formalism for liquid junction potentials was developed. The subject of the study was a membrane used for hemodialysis (Ultra Flo 145 Dialyser) and aqueous NaCl solutions. The research method was the L version of the K-K-P formalism for binary electrolyte solutions. The Peusner coefficients obtained from the transformations of the K-K formalism coefficients for the transport of electrolyte solutions through the artificial polymer membrane were used to calculate the coupling coefficients of the membrane processes and to calculate the dissipative energy flux. In addition, the dissipative energy flux, as a function of thermodynamic forces, made it possible to investigate the energy conversion of transport processes in the membrane system.