Mathematical modeling for desalination by electrodialysis

作者：Han Chunjie^*; Yan Tie

来源：Research Journal of Chemistry and Environment, 2011, 15(2): 39-43.

• Desalination
• Electrodialysis
• Mathematical modeling
• electromigration

Under this condition of direct current (DC), according to the property that ion electromigration happens on the external electric field, mathematical modeling for desalination by electrodialysis (ED) was established on the basis of Na+ separation experimental data. A assumption was given to establish the mathematical modeling: (I) quasi-steady state; (2) negligible electro-osmosis transfer; (3) incompressible fluid; (4) this ion exchange membrane was ideal film and had ideal selectivity for the ion transport; (5) this solution only contained salt of sodium chloride. The mathematical modeling started from a differential equation of steady-state mass balance, derived the equation and was validated by experiments. Experiments were conducted to investigate the effect of voltages and flow rates on ED cell performance and the model parameter was calculated using the outlet concentration in the dilute compartment. The result showed that there is a good consistency between the experimental and calculated data; it was found that the mathematical modeling could be used to well predict the process.

• 出版日期2011-6
• 单位东北石油大学