同©大学 Tongji University Basic Parameters of Membrane Processes Flux is the throughput of per membrane area,J J= S Transmission or (1 Retention)indicates passage of certain solutes,R R-Cr Selectivity is the ratio of permeation between different species(solutes),S =PATongji University Flux is the throughput of per membrane area, J Transmission or (1 - Retention) indicates passage of certain solutes, R Selectivity is the ratio of permeation between different species(solutes), S F p P F F C -C C R= =1- C C Q J= S p A A,B B P S = P Basic Parameters of Membrane Processes