Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Experimental Study on Electrokinetic Streaming Potential in Micropore Channels of Hollw-Fiber Based on General Helmholtz-Smoluchowski's Principle

일반적 Helmholtz-Smoluchowski 원리에 따른 중공사 미세기공 채널에서의 계면동전기 흐름전위에 관한 실험연구

  • 전명석 (한국과학기술연구원 Complex Fluids and Membrane 연구팀) ;
  • 조홍일 (한국과학기술연구원 Complex Fluids and Membrane 연구팀)
  • Published : 2002.03.01
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Abstract

The streaming potential generated by the electrokinetic flow within electric double layer of charged microchannel is applied to determine the zeta potential of hollow-fiber membrane pore by using the general Helmholtz-Smoluchowski equation. The streaming potential is know to provide a useful real-time information on the surface property and the interaction between pore and particles in actual situations and physicochemical conditions. The influence of physicochemical parameters upon the filtration with hollow-fibers has been examined with an in-situ and simultaneously monitoring the streaming potential as well as permeate flux. In particular, the present study examined an experimental method to identify the effect of cake layer which can vary according to the axial position of a hollow-fiber and the progress of membrane fouling by measuring the position-dependent streaming potential. As the latex concentration increases, the permeate flux decreased but the streaming potential increased. The growth of cake layer has been mire developed with increasing latex concentration, however, the effect of surface charges of latexes deposited on the membrane surface leads to increase the streaming potential. With increasing ionic concentration of KCI, both the permeate flux and the streaming potential decrease. The increase of ionic concentration provides a compact cake layer due to the shrinkage of Debye length and the decreased streaming potential results from the weakened ionic flows owing to a thin diffusive double layer.

하전된 마이크로채널의 전기이중층에서 계면동전기 흐름에 의해 발생되는 흐름전위는 일반적 Helmholtz-Smoluchowski 관계식으로부터 중공사 멤브레인 기공의 제타전위를 결정하는데 적용된다. 흐름전위는 실제 운전상황이나 물리화학적 조건에서의 표면특성 및 기공과 입자간 상호작용에 대한 유용한 실시간 정보를 제공함이 알려져 있다. 무리화학적 인자들이 주공사에 의한 여과에 미치는 영향을 투과플럭스와 흐름전위의 동시적 모니터링으로 고찰하였다. 특히, 본 연구에서는 중공사의 위치에 따른 흐름전위를 측정함으로써 중공사 길이 방향과 멤부레인 오염 진행에 따라 달라지는 케이크층 효과를 규명하는 실험방법을 다루었다. 실험결과, 입자농도가 증가할수록 투과플럭스는 감소하나 흐름전위는 증가하였다. 입자농도가 증가하면서 케이크층 성장은 활발하지만 쌓인 하전 입자들의 표면전하 효과로 흐름전위는 증가한 것이다. 용액의 이온화 세기를 KCI 0.1 mM에서 10mM로 증가하면 투과플럭스와 흐름전위가 함께 감소하였다. 이는, 이온화 세기의 증가로 라텍스입자 주위의 Debye 길이 감소로 치밀한 케이크층이 형성되고, 전기이중층의 얇아진 확산층에 의한 이온흐름의 약화로 흐름전위는 감소한 것을 판단된다.

Keywords

References

  1. J. Membrane Sci. v.131 Characterization of cleaning results using combined flux and streaming potential methods M. Nystrom;H. Zhu https://doi.org/10.1016/S0376-7388(97)00053-7
  2. J. Membrane Sci. v.134 Characterisation of the electrokinetic properties of plane inorganic membranes using streaming potential measurements A. Szymczyk;A. Pierre;J. C. Reggiani;J. Pagetti https://doi.org/10.1016/S0376-7388(97)00094-X
  3. J. Membrane Sci. v.133 Surface modification of polysulfone ultrafiltration membranes and fouling by BSA solutions A. Nabe;E. Staude;G. Belfort https://doi.org/10.1016/S0376-7388(97)00073-2
  4. Macromolecules v.31 Surface characterization of poly(acrylonitrile) membranes graft-polymerized with ionic monomers as revealed by ξ potential measurement T. Jimbo;M. Higa;N. Minoura;A. Tanioka https://doi.org/10.1021/ma970692k
  5. J. Membrane Sci. v.145 Tangential flow streaming potential measurements: Hydro-dynamic cell characterization and zeta potentials of carboxylated polysulfone membranes D. Mockel;E. Staude;M. Dal-Cin;K. Darcovich;M. Guiver https://doi.org/10.1016/S0376-7388(98)00077-5
  6. Colloids Surfaces A: Physicochem. Eng. Aspects v.138 The capture of colloidal particles on surfaces and in porous material: basic principles T. G. M. van de Ven https://doi.org/10.1016/S0927-7757(96)03956-8
  7. J. Membrane Sci. v.87 Characterization of ultrafiltration membranes by simultaneous streaming potential and flux measurements M. Nystrom;A. Pihlajamaki;N. Ehsani https://doi.org/10.1016/0376-7388(94)87031-4
  8. J. Colloid Interface Sci. v.170 Streaming potential in membrane processes: Microfiltration of egg proteins N. L. Bolay;A. Ricard https://doi.org/10.1006/jcis.1995.1083
  9. J. Membrane Sci. v.114 Effects of proteins on electrokinetic properties of inorganic membranes during ultra- and micro- filtration L. Ricq;A. Pierre;J.-C. Reggiani;S. Zaragoza-Piqueras;J. Pagetti;G. Daufin https://doi.org/10.1016/0376-7388(95)00248-0
  10. Zeta Potential in Colloid Science: Principles and Applications R. J. Hunter
  11. J. Membrane Sci. v.116 Evalution of eletroosmosis and streaming potential for measurement of electroosmosis and streaming of polymeric membranes K. J. Kim;A. G. Fane;M. Nystrom;A. Pihlajamaki;W. R. Bowen;H. Mukhtar https://doi.org/10.1016/0376-7388(96)00038-5
  12. J. Membrane Sci. v.101 Steps of membrane blocking in flux decline during protein microfiltration W. R. Bowen;J. I. Calvo;A. Hernandez https://doi.org/10.1016/0376-7388(94)00295-A
  13. HWAHAK KONGHAK v.38 The behavior of membrane potential changes during filtration of latex colloids S. Y. Lee;M.-S. Chun;J.-J. Kim
  14. J. Membrane Sci. v.172 Buffer effects on the zeta potential of ultrafiltration membranes D. B. Burns;A. L. Zydney https://doi.org/10.1016/S0376-7388(00)00315-X
  15. Colloids Surfaces A: Physicochem. Eng. Aspects v.189 Electrokinetic and electrochemical characterizations of porous membranes M. J. Ariza;A. Canas;J. Benavente https://doi.org/10.1016/S0927-7757(01)00587-8
  16. J. Membrane Sci. v.56 Effects of protein fouling on the apparent pore size distribution of sieving membranes M. Meireles;P. Aimar;V. Sanchez
  17. Separation Purification Technol. v.24 Dynamic crossflow ultrafitration of colloids: A deposition probability cake filtration approach W. R. Bowen;H. N.l S. Yousef;J. I. Calvo https://doi.org/10.1016/S1383-5866(01)00133-2
  18. J. Colloid Interface Sci. v.204 Effect of interpartcle electrostatic double layer interations on permeate flux decline in crossflow membrane filtration of colloidal suspensions: An experimental investigation R. S. Faibish;M. Elimelech;Y. Cohn https://doi.org/10.1006/jcis.1998.5563
  19. J. Membrane Sci. v.193 On the behavior of the electrostatic colloidal interaction in the membrane filtration of latex suspensions M.-S. Chun;G.-Y. Chung;J.-J. Kim https://doi.org/10.1016/S0376-7388(01)00501-4