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This paper discusses the use of fluorescence spectroscopy in the characterization ofdissolved organic matter (DOM) with respect to the formation of disinfection byproducts(DBPs) during drinking water treatment. Five waters with varying water quality wereused in a bench scale study to test DBP formation under common disinfection schemes;chlorination, booster chlorination, chlorine dioxide/chlorination andchlorination/chloramination. The fluorescence intensity of chlorinated waters decreasesover time as fluorescing components within the DOM react with chlorine throughoxidation, addition and substitution reactions. Fluorescence spectroscopy is a techniquethat can identify different fractions within the DOM through the examination ofexcitation and emission matrices (EEMs). In this study, fluorescence in combinationwith parallel factor analysis (PARAFAC), a mathematical modeling technique, is used toshow the increase in oxidation state of the chlorinated water through the change in theredox state of identified quinone components. PARAFAC allows for the tracking ofdifferent components' contribution to the fluorescence which can allow for tracking ofhow DOM character changes due to treatment. Includes 15 references, table, figures.

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Edition: Vol. - No. Published: 11/01/2008 Number of Pages: 10File Size: 1 file , 690 KB