Monitoring reverse osmosis performance: conductivity versus fluorescence excitation-emission matrix (EEM)

Pype, Marie-Laure, Patureau, Dominique, Wery, Nathalie, Poussade, Yvan and Gernjak, Wolfgang (2013) Monitoring reverse osmosis performance: conductivity versus fluorescence excitation-emission matrix (EEM). Journal of Membrane Science, 428 205-211. doi:10.1016/j.memsci.2012.10.027

Author Pype, Marie-Laure
Patureau, Dominique
Wery, Nathalie
Poussade, Yvan
Gernjak, Wolfgang
Title Monitoring reverse osmosis performance: conductivity versus fluorescence excitation-emission matrix (EEM)
Journal name Journal of Membrane Science   Check publisher's open access policy
ISSN 0376-7388
Publication date 2013-02
Year available 2012
Sub-type Article (original research)
DOI 10.1016/j.memsci.2012.10.027
Volume 428
Start page 205
End page 211
Total pages 7
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2013
Language eng
Abstract This paper evaluated dissolved organic matter (DOM) rejection by reverse osmosis (RO) membranes employed in full-scale water reclamation plants with two techniques based on fluorescence to assess its suitability as a novel method for verification of membrane process integrity. Excitation-emission matrices (EEM) of feed and permeate samples from individual pressure vessels, complete stages and RO trains of two full scale plants were analysed with a fluorescence regional integration technique. Depending on the excitation-emission region quantified, DOM rejection up to around 99.5% was regularly measured and fluorescence measurements could be used as more sensitive tool compared to conductivity profiling when assessing membrane installations. A blue-shift in the fluorescence of the humic substances peak was observed and could be explained by determining size distribution of organic matter by size exclusion chromatography (SEC) with fluorescence detection. The results demonstrated that the size distribution of fluorescent DOM changed towards lower molecular weight from feed to permeate due to increased rejection of high molecular weight compounds. Preliminary trials showed rejection of high molecular weight substances and consequentially membrane integrity beyond 99.9%. We conclude that fluorescence coupled with regional integration techniques and potentially SEC is a promising sensitive technique to assess RO membrane integrity.
Keyword Conductivity profiling
Fluorescence spectroscopy
Membrane integrity
Reverse osmosis
Size exclusion chromatography
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online: 27 October 2012.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2013 Collection
Advanced Water Management Centre Publications
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 7 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 10 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Sun, 24 Feb 2013, 00:20:57 EST by System User on behalf of Examinations