Continuous fluorescence excitation–emission matrix monitoring of river organic matter

Carstea, E. M., Baker, A., Bieroza, M. and Reynolds, D. M. (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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Publisher's URL: http://dx.doi.org/10.1016/j.watres.2010.06.036

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 Bournbrook, Birmingham, UK using an in-situ fibre-optic probe. Fluorescence EEMs were measured every 3 minutes for two weeks, with control ‘grab’ samples every hour analysed 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 T1 and T2 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 T2 fluorescence.

Item Type:Article
Uncontrolled Keywords:fluorescence spectroscopy, water quality monitoring, dissolved organic matter
Faculty/Department:Faculty of Health and Applied Sciences > Department of Biological, Biomedical and Analytical Sciences
ID Code:11555
Deposited By: Dr D. Reynolds
Deposited On:18 Nov 2010 15:50
Last Modified:10 Jun 2014 09:05

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