Ions transfer modeling through monopolar and bipolar membranes: Treatment of wastewater containing ammonium nitrate by electrodialysis

Abstract

In this study, a mathematical model was proposed to illustrate the different transport modes contributing in transfer of all involved species through anion, cation and bipolar membranes. This study was led on a wastewater containing ammonium nitrate treated by bipolar membrane electrodialysis (BPMED). In this electrodialysis, different species are involved, in particular, ammonium ions NH₄⁺, nitrates NO₃^-, ammoniac NH₃, water H₂O and protons H⁺. Calculations led from the material balance sheets equations obtained in bath mode, allowed to validate the proposed transfer model and to check balance sheets material on all involved species during electrodialysis.