Full Description

Natural organic matter (NOM) present in four Korean water sources asrepresentatives of Korean water supplies, and three U.S. water sources were characterizedby dissolved organic carbon (DOC), ultraviolet absorbance (UVA) 254, specific ultraviolet absorbance (SUVA), XAD 8/4 fractionation, SEC-DOC/UV, protein andcarbohydrates contents, and fluorescence excitation and emission matrix (EEM), anddissolved organic nitrogen (DON). Algal organic matter and effluent impacted watersexhibit a fingerprint of high content of colloidal organic matter and/or macromolecules. Itis noteworthy that the high content of colloidal organic matter and/or macromolecules areassociated with an increase in the HPI fraction of DOC and high MW DOC.In order to simulate an integrated membrane system (IMS), water sources wereprefiltered with a 0.22 mm filter. Prefiltered water showed less flux decline after 6 hoursof filtration than 0.45 mm prefiltered water while the rejection rate reached up to 97%based on DOC. However, Fourier Transform Infrared Spectroscopy (FTIR) analysis revealed a signature of polysaccharidesdeposited on the membrane surface. This indicates that the foulant causing a significantflux decline is between 0.45 ~ 0.22 mm and these sizes reflect colloidal organic matterand/or macromolecules. Includes 4 references, tables, figures.

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Edition: Vol. - No. Published: 11/15/2004 Number of Pages: 16File Size: 1 file , 5.3 MB