Abstract
The article provides data on the effect of the concentration of I-I electrolyte salt on the transfer through the Vontron VNF 1812 nanofiltration membrane. Data for NaNO3, NaCl, NaHCO3, NaH2PO4 and alkali metal nitrates are presented. The experimental data obtained suggest that the flux of water and salt are determined by the interaction of anions with protonated amino groups, which are part of the material of the selective membrane layer. An increase in the transmembrane flux of alkali metal nitrates is observed in the series CsNO3>KNO3>NaNO3>LiNO3. This series is opposite to the series of selectivity in the sorption of metals on carboxyl cation exchangers, but this series coincides with the series of increasing diffusant mass. It is noted that for all the solutions under study, water transfer can occur at an operating pressure significantly lower than the osmotic pressure calculated by the Van't Hoff equation, which indicates the essential role of filtration in the traditional understanding of this term
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
