Continuous fluorescence excitation-emission matrix monitoring of river organic matter

Carstea, Elfrida M. and Baker, Andy and Bieroza, Magdalena and Reynolds, Darren (2010) Continuous fluorescence excitation-emission matrix monitoring of river organic matter. Water Research, 44 (18). pp. 5356-5366. ISSN 0043-1354

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Abstract

Real-time fluorescence monitoring has been mostly performed in marine systems, with little progress being made in the application of fluorescence excitation emission matrix (EEM) spectroscopy, especially for freshwater monitoring. This paper presents a two weeks experiment where real-time fluorescence EEM data have been obtained for Bourn Brook, Birmingham, UK, using an in-situ fibre-optic probe. Fluorescence EEMs were measured every 3 min for two weeks, with control 'grab' samples every hour analyzed for fluorescence EEMs as well as pH, conductivity and dissolved organic carbon. Comparison of real-time and control samples showed an excellent agreement, with no evidence of fibre-optic probe fouling. EEMs of different character were identified using self-organizing maps, which demonstrated seven clusters of fluorescence EEMs which related to the intensity of fluorescence and relative intensities of peak T-1 and T-2 vs. peak C and peak A fluorescence. Fluorescence intensity of peaks A and C were observed to increase with rainfall, and a diesel pollution event was detected through an increase in T-2 fluorescence. (C) 2010 Elsevier Ltd. All rights reserved.

Item Type:
Journal Article
Journal or Publication Title:
Water Research
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2300/2311
Subjects:
ID Code:
50178
Deposited By:
Deposited On:
03 Oct 2011 10:07
Refereed?:
Yes
Published?:
Published
Last Modified:
24 Mar 2020 02:48