New parametrization method for salt permeability of reverse osmosis desalination membranes

Reverse osmosis (RO) is the most important membrane technology for desalination of water. Measured water and salt fluxes are traditionally analyzed in context solution-diffusion (SD) model which leads to a permeability, A, B. However, this parametrization flux not correct by RO membranes, because these membranes show markedly different retentions feed concentrations, classical observation literature, effect captured SD model. Thus, traditional permeability B an intrinsic property membranes. We present new analysis 1:1 salt, follows from transport theory that based on assumption coions strongly excluded membrane, we demonstrate it accurately describes large dataset retention as function pressure concentration. This unique values permeabilities, A B″, dependent concentration or permeate flux. Because now have improved parametrization, can more compare study detail how performance depends conditions such type temperature. The equation provide guidance design high-performance process modeling systems.