1984 Volume 9 Issue 4 Pages 231-235
Reverse osmosis concentration of phenol in aqueous solution was examined by an interpolymer anionic composite membrane. The phenol concentration tests were carried out under applied pressure of 80kg/cm2 at 25°C. The rejection of phenol in undissociated state decreased with concentration of feed solution. On the other hand, the rejection in dissociated state was almost unchangeable until reverse osmosis concentration reached at ten times concentration ratio (X). The membrane showed higher rejection (90-95%) for phenol in dissociated state than the rejection for NaCl (90%). Therefore, reverse osmosis concentration may be possible to concentrate up to nine times of feed concentration of phenol. In undissociated state, the membrane showed lower rejection for phenol (39-62%) at 94% rejection level of NaCl, and concentration limit by reverse osmosis was at only two or three times of feed concentration.
