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Effect of hydrodynamics and solution ionic strength on permeate flux in cross-flow filtration: Direct experimental observation of filter cake cross-sections

  • Volodymyr V. Tarabara
  • , Ismail Koyuncu
  • , Mark R. Wiesner*
  • *Bu çalışma için yazışmadan sorumlu yazar
  • Michigan State University
  • Rice University

Araştırma sonucu: Dergiye katkıMakalebilirkişi

79 Atıf (Scopus)

Özet

The structure of membrane cakes formed in cross-flow filtration was investigated for conditions of variable particle size and solution ionic strength. In all cases, microscopic examination of membrane cake cross-sections revealed a stratified structure: a dense region of the colloidal deposit adjacent to the membrane with an abrupt transition to a much more porous layer near the membrane-suspension interface. The thickness and structure of individual layers varied as functions of particle size and solution ionic strength. Relative specific hydraulic resistances of individual layers were estimated from regressed transport coefficients in a model describing macroscopic transport and permeate flux. This work provides direct experimental confirmation of trends predicted from theory that couples hydrodynamic conditions and interparticle interactions to describe the permeate flux performance of cross-flow filtration membranes.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)65-78
Sayfa sayısı14
DergiJournal of Membrane Science
Hacim241
Basın numarası1
DOI'lar
Yayın durumuYayınlandı - 15 Eyl 2004

Finansman

This work was supported in part by funding through the EPA Hazardous Substances Research Centers South and Southwest and in part by the Nanoscience and Engineering Initiative of the National Science Foundation under NSF Award No. EE-0118007. One of us (I.K.) also acknowledges the support by TUBITAK NATO-B1 research grant. We would like to thank Dr. Alejandro Peña (Department of Chemical Engineering, Rice University) for his help with contact angle measurements and Mr. Stephane Moustier (Centre Européen de Recherche et d’Enseignement de Géosciences de l’Environnement) for his assistance with Multisizer S. We also thank Hydranautics (Oceanside, CA) for providing us with NTR-7410 ultrafiltration membranes. Comments of two anonymous referees are gratefully acknowledged.

FinansörlerFinansör numarası
Nanoscience and Engineering Initiative
TUBITAK NATO-B1
National Science FoundationEE-0118007

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