Effect of Pulsed Electric Field on the Electrodialysis Performance of Phosphate-Containing Solutions

Olesya Rybalkina; Ksenia Solonchenko; Daria Chuprynina; Natalia Pismenskaya; Victor Nikonenko

doi:10.3390/membranes12111107

Effect of Pulsed Electric Field on the Electrodialysis Performance of Phosphate-Containing Solutions

Membranes (Basel). 2022 Nov 5;12(11):1107. doi: 10.3390/membranes12111107.

Authors

Olesya Rybalkina¹, Ksenia Solonchenko¹, Daria Chuprynina², Natalia Pismenskaya¹, Victor Nikonenko¹

Affiliations

¹ Physical Chemistry Department, Kuban State University, 149 Stavropolskaya Str., 350040 Krasnodar, Russia.
² Analytical Chemistry Department, Kuban State University, 149 Stavropolskaya Str., 350040 Krasnodar, Russia.

Abstract

A comparative analysis of mass transfer characteristics and energy consumption was carried out for the electrodialysis recovery of P^V from of NaH₂PO₄ solutions and multicomponent (0.045 M Na_xH_(3-x)PO₄, 0.02 M KCl, 0.045 M KOH, 0.028 M CaCl₂, and 0.012 M MgCl₂, pH 6.0 ± 0.1) solution in conventional continuous current (CC) and pulsed electric field (PEF) modes. The advantages of using PEF in comparison with CC mode are shown to increase the current efficiency and reduce energy consumption, as well as reduce scaling on heterogeneous anion-exchange membranes. It has been shown that PEF contributes to the suppression of the "acid dissociation" phenomenon, which is specific for anion-exchange membranes in phosphate-containing solutions. Pulse and pause lapse 0.1 s-0.1 s and duty cycle 1/2 were found to be optimal among the studied PEF parameters.

Keywords: anion-exchange membrane; electrodialysis; energy consumption; phosphates; pulsed electric field; scaling.

Grants and funding

21-19-00087/Russian Science Foundation