Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Combined Effects of Metal Coagulants and Monochloramine on Polyamide RO Membrane Performance

금속성 응집제와 모노클로라민의 상호작용이 Polyamide계 RO막 성능에 미치는 영향

  • 김경화 (고려대학교 공과대학 사회환경시스템공학과) ;
  • 홍승관 (고려대학교 공과대학 사회환경시스템공학과) ;
  • 박찬혁 (한국과학기술연구원 수질환경 및 복원연구센터) ;
  • 윤성로 ((주) 새한 기술연구소) ;
  • 홍성표 ((주) 새한 기술연구소) ;
  • 이종화 ((주) 새한 기술연구소)
  • Received : 2006.06.13
  • Accepted : 2006.08.04
  • Published : 2006.08.15
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Abstract

The bench-scale chlorine exposure study was performed to investigate the effect of pretreatment by free chlorine and monochloramine ($NH_2Cl$) on the performance of RO membranes made of polyamide (PA). Feed monochloramination at 2mg/L did not cause significant productivity loss compared to free chlorine. However, metal coagulants reacted with monochloramine, the PA membrane suffered from a gradual loss of membrane integrity by chlorine oxidation, which was characterized as a decrease in salt rejection. Especially, RO membranes exposed to alum coagulants with monochloramine revealed the salt rejection lower than those exposed to iron coagulants. XPS membrane surface analysis demonstrated that the chlorine uptake on the membrane surface increased and carbon peaks were shifted significantly when exposed to alum coagulants with monochloramine.

Keywords

References

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