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Type: Journal article
Title: Assessment of a new combined fractionation technique for characterization of the natural organic matter in the coagulation process
Author: Bazrafkan, B.
Wei, Q.
Fabris, R.
Chow, C.
van Leeuwen, J.
Wang, D.
Drikas, M.
Citation: Desalination and Water Treatment, 2012; 48(1-3):252-260
Publisher: Taylor & Francis
Issue Date: 2012
ISSN: 1944-3994
Statement of
Behnoosh Bazrafkan, Qunshan Wei, Rolando Fabris, Christopher W.K. Chow, John van Leeuwen, Dongsheng Wang, Mary Drikas
Abstract: The application of a new combined fractionation technique (CFT) using high performance size exclusion chromatography (HPSEC) and rapid resin fractionation (RRF) for characterization of natural organic matter (NOM) in raw and post-coagulated water samples was assessed. Two natural water samples from Myponga and Hope Valley reservoirs, South Australia, respectively, were selected for this NOM removal by coagulation study. With the use of HPSEC and RRF individually, removal in the low molecular weight (LMW) organic region was observed by comparison of the HPSEC profiles of raw and treated waters and the removal of the hydrophobic organics was observed by comparing the RRF results. A new organic fractionation and characterization technique involving the sequential application of the two techniques, called RRF–HPSEC, was developed to provide additional analytical information particularly to determine the key control factor for the removal of LMW organics. The RRF–HPSEC results showed that good removal of LMW organics could be linked to the presence of high ratio of hydrophobic LMW organics compared with hydrophilic LMW organics. It was revealed, therefore, that the removal of LMW organics was achieved mainly through the reduction of hydrophobic fractions compared with hydrophilic fractions with the corresponding molecular weight.
Keywords: NOM characterization; Coagulation; HPSEC; Rapid resin fractionation; Hydrophobicity; Molecular weight
Rights: © 2012 Desalination Publications. All rights reserved.
RMID: 0030022690
DOI: 10.1080/19443994.2012.698821
Appears in Collections:Chemical Engineering publications

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