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Cho, Jaeweon
OWIELAB(Organic-Water Interface Engineering Laboratory)
Research Interests
  • Convergence of Science and Arts, Feces Standard Money (FSM), Water & Energy

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Investigation of the adsorption and transport of natural organic matter (NOM) in ion-exchange membranes

Cited 11 times inthomson ciCited 24 times inthomson ci
Title
Investigation of the adsorption and transport of natural organic matter (NOM) in ion-exchange membranes
Author
Kim, DoheeMoon, Seung-HyeonCho, Jaeweon
Keywords
ion-exchange (IX) membrane; electrodialysis (ED); natural organic matter (NOM); adsorption; fouling; apparent pore size; apparent charge
Issue Date
2003-01
Publisher
ELSEVIER SCIENCE BV
Citation
DESALINATION, v.151, no.1, pp.11 - 20
Abstract
The adsorption and transport characteristics of natural organic matter (NOM) in an ion-exchange (IX) membrane were investigated and the various methods to characterize the properties of NOM and the IX membrane were collectively evaluated in this study. NOM adsorption by an IX membrane is affected by both pH and ion strength. Under alkaline pH and low ionic strength, greater NOM adsorption can be expected. A good relationship was obtained between the amount of adsorbed NOM and the zeta potential. The NOM acids constituents are expected to be transported preferentially through an IX membrane during the electrodialysis (ED) process because of their negative charge density. However, the molecular mass of the NOM acids was too high to allow them to pass through the IX membrane pores, and this caused an accumulation or adsorption of the solutes on the membrane surface. A fractional-rejection method was applied to determine the apparent pore size distribution of IX membranes and the selectivity coefficient was used to calculate apparent charges ofNOM. The major apparent pore size distribution (PDS) of the IX membrane used in this study lay in the range 100-200 mass units. The apparent charge of the NOM used was 5.5 (dimensionless)
URI
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DOI
10.1016/S0011-9164(02)00968-2
ISSN
0011-9164
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UEE_Journal Papers
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