Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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Visualization of Ion Transport and pH Change in Ion Concentration Polarization

농도 분극 현상에서의 이온의 흐름과 pH 변화의 가시화

  • 고성희 (포항공과대학교 기계공학과 대학원) ;
  • 강관형 (포항공과대학교 기계공학과)
  • Received : 2010.12.07
  • Accepted : 2010.12.27
  • Published : 2010.12.31
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Abstract

Ion concentration polarization is an electrokinetic phenomenon which occurs in membrane systems, such as in an electrodialysis and fuel-cell system. But the phenomenon is not fully understood because hydrodynamics, electrokinetics and electrochemistry are coupled with each other. Here, we report that there occurs a change of pH value of buffer solution in concentration polarization phenomenon. To visualize the change of pH, the litmus solution which is one of the pH indicators was used. It is conjectured that the pH of solution changes because hydrogen ions were concentrated in cathodic side and hydroxide ions were concentrated in anodic side. We anticipate that this work may contribute to the fundamental understanding on the ion concentration polarization phenomenon.

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References

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