Studies on the Fouling Reduction by Coating of Cationic Exchange Polymer onto Reverse Osmosis Membrane Surfaces

역삼투막 표면의 양이온 교환 고분자 코팅에 의한 파울링 감소 연구

  • Received : 2012.07.13
  • Accepted : 2012.09.05
  • Published : 2012.11.25


The cation exchange polymer, poly(styrene sulfonic acid) (PSSA), was coated onto polyamide (PA) thin film composite reverse osmosis (RO) membranes. Then these membranes were investigated for the model foulants, bovine serum albumin (BSA), humic acid (HA), and sodium alginate (SA) to check whether there are some improvement. The contact angle of PSSA coated PA RO membrane showed $58^{\circ}$ from $78^{\circ}$, the value of PA RO membrane, which confirmed successful hydrophilization. As the operating pressure increased (2, 4, 8 atm for BSA, HA and SA 100 ppm in feed solution), the fouling phenomena was worse for both none- and PSSA-coated membranes. The fouling increased in the order of BSA>SA>HA due to the interactions between sulfonic acid in PSSA and functional groups of foulants. On the other hand more significant fouling reduction was observed in the order of HA>SA>BSA. The photographs of scanning electron microscopy showed the same trend. As a result, there was the improvement of fouling phenomena for the PSSA coated RO membranes, distinctly in the case of HA.


fouling;polyamide membrane;poly(styrene sulfonic acid);bovine serum albumin;humic acid;sodium alginate


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