Korean Membrane Journal

The Membrane Society of Korea (한국막학회)
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Characterizations of Membrane for Water Treatment: Surface Charge Analysis by Electrophoresis and Acidity Measurements

  • Yongki Shim (Department of Environmental Science and Engineering, Kwangju Institute of Science & Technology (K-JIST)) ;
  • Lee, Sangyoup (Department of Environmental Science and Engineering, Kwangju Institute of Science & Technology (K-JIST)) ;
  • Moon, Seung-Hyeon (Department of Environmental Science and Engineering, Kwangju Institute of Science & Technology (K-JIST)) ;
  • Jaeweon Cho (Department of Environmental Science and Engineering, Kwangju Institute of Science & Technology (K-JIST))
  • Published : 2000.12.01
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Abstract

The surface charge properties of a polymeric NF and a ceramic UF membranes were characterized in terms of zeta potential and acidity. Both the negative zeta potential and acidity values increased as pH increases due to ionizable acidic functional groups. Increased ionic strength reduced the acidity of the negatively-charged membrane surface as anticipated. Through these results, it can be envisioned are used to reject solutes with ionizable functional groups. Fouling of the negatively-charged membrane with natural organic matter (NOM) having a negative charge density was also investigated with respect to the surface charge. The surface charge of the NF membrane increased negatively when greater NOM adsorption onto the membrane surface occured.

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References

  1. J. Membrane Sci. v.164 J.Cho;G.L.Amy;J.Pellegrino
  2. Desalination v.95 M.Elimelech;W.H.Chen;J.J.Waypa