Analysis of the Kinetic Characteristics of Electrochemical Nanofiltration Separation of Zinc-Containing Solutions on the Basis of the Electroconvective Theory

• Published in: Journal of engineering physics and thermophysics Vol. 97; no. 2; pp. 424 - 429
• Main Authors: Konovalov, D. N., Lazarev, S. I., Polyanskii, K. K.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-03-2024; Springer Nature B.V
• Subjects: Classical Mechanics; Complex Systems; Current density; Current efficiency; Empirical analysis; Engineering; Engineering Thermodynamics; Heat and Mass Transfer; Industrial Chemistry/Chemical Engineering; Mathematical analysis; Membranes; Nanofiltration; Permeability; Separation; Thermodynamics; Zinc; membrane; retention coefficient; specific output flow; electroconvection; electrochemical nanofiltration process; zinc
• ISSN: 1062-0125; 1573-871X
• DOI: 10.1007/s10891-024-02909-y

A method is proposed for optimizing the specific flow of a substance at the outlet of filtration membranes with limitations on current, electroosmotic permeability, retention coefficient, and current efficiency at a constant transmembrane pressure. Based on analytical and empirical studies, engineering formulas have been obtained making it possible to calculate the specific output flow for flat-chamber devices with OFAM-K and OPMN-P nanofiltration membranes, which determines the productivity of the electrochemical nanofiltration process of separation of zinc-containing solutions in wide ranges of changes in the electric current density, electrical permeability, and membrane retention coefficient, as well as in transmembrane pressure. The adequacy of the proposed method was verified by comparing calculated and experimental data on the specific flow of matter at the output of the OFAM-K anode membrane and the OPMN-P cathode one. The verification has shown the effectiveness of the obtained engineering formulas in a wide range of changes in the current density on the membranes.