Co-P P Untreated Treated   ratio Swelling (%) Conv (%) Gel. (%) Swelling (%) Conv(%) Gel. (%) CA+PVA PEG 2:1 49.84 81.75 68.29 110 61 59.16 4:1 52.64 79.75 60.97 120 56 55 8:1 57.39 75.22 47.32 185 45 45.23

Table 6: Effect of chemical treatment or quaternization on the swelling of some synthetic composite reverse osmosis membranes.

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