Tracing nitrogenous disinfection byproducts after medium pressure UV water treatment by stable isotope labeling and high resolution mass spectrometry

Environmental Science & Technology
Annemieke KolkmanAnnemarie P van Wezel

Abstract

Advanced oxidation processes are important barriers for organic micropollutants (e.g., pharmaceuticals, pesticides) in (drinking) water treatment. Studies indicate that medium pressure (MP) UV/H2O2 treatment leads to a positive response in Ames mutagenicity tests, which is then removed after granulated activated carbon (GAC) filtration. The formed potentially mutagenic substances were hitherto not identified and may result from the reaction of photolysis products of nitrate with (photolysis products of) natural organic material (NOM). In this study we present an innovative approach to trace the formation of disinfection byproducts (DBPs) of MP UV water treatment, based on stable isotope labeled nitrate combined with high resolution mass spectrometry. It was shown that after MP UV treatment of artificial water containing NOM and nitrate, multiple nitrogen containing substances were formed. In total 84 N-DBPs were detected at individual concentrations between 1 to 135 ng/L bentazon-d6 equivalents, with a summed concentration of 1.2 μg/L bentazon-d6 equivalents. The chemical structures of three byproducts were confirmed. Screening for the 84 N-DBPs in water samples from a full-scale drinking water treatment plant based on MP UV/H2...Continue Reading

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Citations

Dec 1, 2015·Analytical Chemistry·Susan D Richardson, Susana Y Kimura
Jun 24, 2015·Water Research·Daekyun KimTanju Karanfil
May 14, 2016·PloS One·Kevin A Thorn, Larry G Cox
Jul 6, 2017·Environmental Science & Technology·Dongjuan DaiAmy Pruden
May 28, 2020·Analytical and Bioanalytical Chemistry·Mohammad Sajjad AbdighahroudiTorsten C Schmidt
Jan 8, 2021·Journal of Cheminformatics·Rick HelmusEmma L Schymanski
Sep 7, 2017·Environmental Science & Technology·Juliane HollenderP Lee Ferguson

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