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Cho, Jaeweon
도시환경 감각연구소/Sense Laboratory
Research Interests
  • Convergence of Science and Arts; Environment Ethics; Meta-modernism in Semantics Engineering

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Effects of molecular weight cutoff, f/k ratio (a hydrodynamic condition), and hydrophobic interactions on natural organic matter rejection and fouling in membranes

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Title
Effects of molecular weight cutoff, f/k ratio (a hydrodynamic condition), and hydrophobic interactions on natural organic matter rejection and fouling in membranes
Author
Cho, JaeweonSohn, JChoi, HKim, ISAmy, G
Keywords
F/k ratio;  Flux decline;  Nanofiltration;  Natural organic matter;  Ultrafiltration
Issue Date
2002-03
Publisher
IWA PUBLISHING
Citation
JOURNAL OF WATER SUPPLY RESEARCH AND TECHNOLOGY-AQUA, v.51, no.2, pp.109 - 123
Abstract
All the possible mechanisms and factors affecting flux decline, natural organic matter (NOM) rejection, and NOM transport were studied in this paper. Electrostatic exclusion (charge repulsion) was determined to be an influential factor in minimizing flux decline and membrane fouling, and in maximizing NOM rejection; the effective MWCO (membrane molecular weight cutoff) concept was used to support the notion of electrostatic interactions and to describe all apparent MWCO by a charged membrane. This allowed for a negatively-charged tight ultrafiltration (UF) membrane to be comparatively compared to a nanofiltration (NF) membrane in terms of NOM rejection. The f/k ratio, relating relative back-diffusional transport to convective transport, was identified as a major influential factor in terms of flux decline and NOM rejection. The effect of hydrophobicity on flux decline was not significant when the same f/k ratio was used for different Nom-membrane pairs. The convectional and diffusional transportation of NOM was also evaluated for NF and UF membranes using existing thermodynamic models
URI
https://scholarworks.unist.ac.kr/handle/201301/11931
ISSN
0003-7214
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