Concentration polarization and specific selectivity of membranes in pulse mode

Nonstationary concentration polarization of membranes was analyzed theoreti cally. Desalination and transport of single- and double-charged ions throug h MK-40 cation-exchange membrane was studied in the stationary and pulse mo des with the fixed voltage. Main generalities in the changes of the pH and conductivity of desalinated solution as well as concentrations of single- a nd double-charged ions as the functions of solution flow velocity, voltage, frequency and off-duty ratio of pulses were established.