Combined Effects between Copper ion and Natural Organic Matter on Nanofiltration Fouling

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Publication Details

Author list: Hongthong, P.;Mattaraj, S.;Jiraratananon, R.

Publication year: 2009

Journal: Thai Environmental Engineering Journal (1686-2961)

Volume number: 23

Issue number: 3

Start page: 149

End page: 157

ISSN: 1686-2961

Abstract

This research was studied to determine the combined effects between copper ion and natural organic matter(NOM) on nanofiltration fouling using a bench-scale crossflow nanofiltration test cell. Mathematical fouling modelswere used to characterize flux decline during filtration. Experimental results revealed that solution flux declineincreased with increasing ionic strength from 0.005 M to 0.05 M NaCl. At ionic strength of 0.01 M, combined copperion and natural organic matter caused an decreased solution flux decline, possibly causing a loose compacted cakeformation at the membrane surface, while the removal of copper and NOM increased when compared with solutionscontaining NOM alone. It was found that solution flux curve of combined copper ion and NOM followed cakeformation model. In this study, scanning electron microscopy (SEM) was used to investigate fouling on membranesurface that caused flux decline during nanofiltration experiments.

Keywords

copper ion, flux decline, fouling, nanofiltration, natural organic matter