Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Characteristics of the Turbidity Change of Clay Particulate Matter according to Its Surface Electrokinetic Behavior

점토성 광물입자의 표면 전기적 거동에 따른 탁도 변화 특성

  • O, Sejin (Department of Environmental Science and Engineering, Ewha Womans University) ;
  • Kim, Dong-Su (Department of Environmental Science and Engineering, Ewha Womans University)
  • 오세진 (이화여자대학교 환경공학과) ;
  • 김동수 (이화여자대학교 환경공학과)
  • Received : 2009.12.03
  • Accepted : 2010.01.20
  • Published : 2010.03.30
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Abstract

Montmorillonite is one of representative inorganic clay particles. As the characteristics of clay particulate matter in aqueous environment determine the efficiencies of wastewater treatment and some industrial operations, it is essential to understand its aquatic behavior in relation with turbidity. The change of electrokinetic potential of montmorillonite suspension shows that it tends to negatively increase as the pH of suspension increases. In addition, it is observed that its potential is around 0mV when the solution pH is ca. 5. The turbidity of suspension is shown to be very low when pH is lower than its isoelectric point. However, the turbidity gradually enhances according to beyond isoelectric point. These results reveal that the correlation between electrokinetic potential and turbidity for clay mineral suspension is peculiar which should be fundamentally considered for systematic treatment of wastewater.

Keywords

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