Characteristics of low and high SUVA precursors: Relationships among molecular weight, fluorescence, and chemical composition with DBP formation

Disinfection by-products (DBPs) formed upon water treatment is an emerging issue worldwide. While monitoring of DBP precursors can easily be achieved for high specific UV absorbance (SUVA) organic (>6 L/mg·m), low and extremely low SUVA precursors (100 and >5, respectively). Such precursors ex...

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Veröffentlicht in:The Science of the total environment 2020-07, Vol.727, p.138638-138638, Article 138638
Hauptverfasser: Hua, Lap-Cuong, Chao, Shu-Ju, Huang, Kochin, Huang, Chihpin
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Sprache:eng
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Zusammenfassung:Disinfection by-products (DBPs) formed upon water treatment is an emerging issue worldwide. While monitoring of DBP precursors can easily be achieved for high specific UV absorbance (SUVA) organic (>6 L/mg·m), low and extremely low SUVA precursors (100 and >5, respectively). Such precursors exhibited the fluorescence of long-wavelength humic-like signal and occurred at a high MW range (>30 kDa). By contrast, low SUVA precursors were either N-rich and/or O-rich substances, associated with much lower carbon content (40–70%). Low SUVA, N-rich precursors particularly also occurred at a high MW region (>100 kDa) and produced a strong protein-like fluorescence signal. When SUVA values of O-rich precursors were extremely low (
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2020.138638