Effect of the Parameters of Pulsed Electric Fields on the Average Current Density in the Electrodialysis Desalination of a Phosphate-Containing Solution

The effect of pulsed electric field (PEF) parameters on the period-average current densities in the electrodialysis desalination of sodium dihydrophosphate solutions has been studied for the first time. Ir has been shown that, in the case of sodium dihydrophosphate solutions, the PEF effect regularities are generally the same as for the solutions of strong electrolytes. Using the visualization of electroconvective flows in a lean solution near the surface of an anion-exchange membrane, it has been established that the observed distinction in the behavior of membrane systems is caused by weak electroconvection in phosphate-containing solutions. The hypothesis that another reason for the observed distinctions is the effect of a pulsed electric field on the deprotonation of \({{{\text{H}}}_{{\text{2}}}}{\text{PO}}_{4}^{ - }\) anions entering the volume of an anion-exchange membrane is put forward.