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Abstract
The impact of temperature on net driving force and concentration polarization was considered in this study. The study is based on experimental data on permeability of reverse osmosis (RO) at different temperature. The paper contains experimental data and theoretical calculation of permeability. Elevation in temperature from t = 20 to t = 35°C is accompanied by increase of CP modulus. Experimental (and theoretical) values of CP modulus range from 1.1 (and 1.23) at t = 20°C to 1.2 (and 1.29) at t = 35°C, respectively. Satisfactory agreement between empirical data and theoretical values of CP modulus is demonstrated. Based on the analysis of the experimental performance of membrane with high degree of salt rejection, the following conclusions have been drawn: growth of temperature is accompanied by increase of hydraulic permeability of the membrane matrix itself but enhancement of surface concentration that in turn causes decline of the net driving forces. Experimental profiles are attached.