Prediction of single salt rejection by NF membranes: An experimental methodology to assess physical parameters from membrane and streaming potentials

► An experimental methodology to assess model parameters is presented. ► εp is determined from membrane potential measurements for ternary ionic mixtures. ► Adsorption isotherms are estimated by tangential streaming potential. ► Profile of Xd along the pore length is calculated from these isotherms. ► Rejection of single salts can be predicted without adjusting any parameter.