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(a) Water permeance and rejection rates of the tubular COF-LZU1 membrane in the NF of different dyes (photographs show the colors of the dye solutions before (1) and after (2) NF). (b) Stability test of the tubular COF-LZU1 membrane in a long-time NF of CB. Operating pressure: 0.5 MPa; dye concentration: 100 mg L−1; room temperature. Reprinted with permission from [26]. Copyright (2018) John Wiley and Sons publications.
