Experimental and modelling analysis of the separation of ionic salts solution in nanofiltration process

This paper presents the possibility of the use of Donnan and Steric Partitioning Pore Model (DSPM) based on the extended Nernst-Planck equation for interpretation of the separation of chromium(III) and chloride ions from concentrated salt solution in nanofiltration process. Results of predictions obtained with the analyzed model showed the significant effect of the pore dielectric constant on separation of chromium(III) and chloride ions from concentrated salt solution on nanofiltration membranes. It was found that the increase of pore dielectric constant caused the decrease of chromium(III) and chloride ions separation. Additionally, the satisfactory agreement between experimental and predicted data was stated. The Donnan and Steric Partitioning Pore Model may be helpful for the monitoring of nanofiltration process applied for different industrial wastewater treatment.