Fundamental Studies on the Characteristics of the Surface Electrokinetic Behavior of Particulate Matter as an Extensive Property

입자성 물질의 크기성질로서의 표면 전기적 특성 규명에 대한 기초연구

  • O, Se-Jin (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 : 2010.02.03
  • Accepted : 2010.06.04
  • Published : 2010.06.30


Generally, electrokinetic potential has been considered as an intensive property. In other words, electrokinetic potential is not affected by the amount of particulate matter. Montmorillonite, one of essential inorganic matter, was chosen to measure electrokinetic potential. The result of electrokinetic potential measuring experiment showed that the value observed to decrease as the amount of montmorillonite clay increased. This is due to the fact that total ions that adsorbed per unit mass were decreased as the amount of montmorillonite was increased. As a result, electrokinetic potential is considered as an extensive property. By using these results, total interaction energy of suspension was also checked, and revealed that total interaction energy was decreased as the amount of montmorillonite increased.

일반적으로 전기 동역학적 전위는 세기성질로 알려져 있으며 이를 바탕으로 연구들이 진행되어 왔다. 본 연구에서는 대표적 무기성 물질인 몬모릴로나이트를 대상으로 하여 분산체를 제조해 전위를 측정하였다. 전기 동역학적 전위를 측정한 결과, 몬모릴로나이트의 질량이 증가할수록 전위값이 감소하는 경향을 나타내었다. 이는 몬모릴로나이트의 질량이 증가하면서 단위질량당 흡착하는 이온의 양이 적어지기 때문이라고 사료된다. 이러한 결과는 전위가 세기성질이 아닌 크기성질을 따른다고 생각할 수 있다. 또한 측정한 전기 동역학적 전위값을 통해 입자간 상호 에너지를 측정한 결과 몬모릴로나이트의 질량이 증가할수록 상호 입자간 에너지가 점차적으로 감소하는 경향이 관찰되었다.


Supported by : 한국연구재단


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