Rasha A. Hajarat, Hadeel Alfasatleh, Rawan Alhgaish, SalamNader  

Abstract:

Nernst-Planck equation was used to try to understand the separating behavior of Ca2+, and Br- ions using nanofiltration membrane. The model was run for different membrane pores, different volumetric flux based on the membrane area values, and different ion concentration; to study the rejection behavior. In general, as the membrane pore radius increased, the rejection of Ca2+ and Br- ions decreased; where the rejection of Ca2+ ion was higher than the rejection of Br- ion. While the rejections of Ca2+ and Br- ions increased as volumetric flux based on the membrane area increased. On the other hand, the concentration of Br- inside the membrane active layer was the higher than the concentration of Ca2+ ions. Thus the ions rejection is effected by the membrane pore radius beside the volumetric flux based on the membrane area.