Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Measurement Technique of Membrane Fouling in Processes Utilizing Ion-Conducting Polymer Membranes

이온전도성 고분자막 활용 공정에서의 막 오염 현상 측정 기술

  • Han, Soo-Jin (Department of Green Chemical Engineering, College of Engineering, Sangmyung University) ;
  • Park, Jin-Soo (Department of Green Chemical Engineering, College of Engineering, Sangmyung University)
  • 한수진 (상명대학교 공과대학 그린화학공학과) ;
  • 박진수 (상명대학교 공과대학 그린화학공학과)
  • Received : 2017.10.21
  • Accepted : 2017.10.27
  • Published : 2017.10.31
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Abstract

Electrical impedance spectroscopy is used to detect membrane fouling in-situ in reverse electrodialysis. The impedance data for the AMX membrane being fouled in the reverse electrodialysis are plotted and analyzed by Nyquist and admittance method. The meaningful graphical analyses for the fouling phenomena could be done by both Nyquist and admittance method. In addition, the unstable initial fouling stage was identified by the admittance data with high standard deviation, and the structural change of the fouling layer formed at the surface of anion-exchange membranes with the operation time of reverse electrodialysis was also detected.

본 연구에서는 역전기투석 공정에서 발생 가능한 막오염 현상을 in-situ로 측정하기 위하여 임피던스 스펙트로스코피 방법을 도입하여 실제 발생한 막오염 현상 측정 방법을 제시하였다. 얻어진 임피던스 데이터를 활용하여 Nyquist 도시법과 어드미턴스 도시법으로 스펙트럼을 도시하였으며 두 도시법 모두 유의미한 막오염 현상을 감지할 수 있었다. 또한 초기 막오염 현상에서 음이온 교환막 표면에 막오염물의 불안정한 축적 현상 및 역전기투석 공정의 운전 시간에 따른 막오염층의 구조적 변화를 감지할 수 있었다.

Keywords

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