Jump to main content
Jump to site search


Potential formation of mutagenicity by low pressure-UV/H2O2 during the treatment of nitrate-rich source waters

Author affiliations

Abstract

Mutagenicity formation by low pressure (LP)-UV/H2O2 treatment of nitrate-rich water containing natural organic matter (NOM) was investigated. Laboratory-grade water samples spiked with either Pony Lake NOM or Suwannee River NOM (4 mg L−1 in both cases) and nitrate (50 mg L−1) were irradiated with UV fluences of 0, 1500 and 2000 mJ cm−2 and a H2O2 dose of 15 mg L−1 and tested for mutagenicity with the Ames II assay. LP-UV photolysis of nitrate in the presence of Pony Lake NOM caused a significant increase in the Ames II assay response and low concentrations of nitrite (0.08–0.09 mg NO2 L−1) and nitrophenols (0.014–0.046 μg L−1) were detected. Suwannee River NOM produced the same nitrite levels but no significant responses in the Ames II assay were observed. Additionally, samples collected from a drinking water treatment plant in the UK using LP-UV/H2O2 treatment were analysed with the Ames II assay. LC-OCD fractionation and SUVA measurements were performed to observe any changes in the properties of NOM. Significant differences in the mutagenicity response were observed between the treatment steps as well as between the two sampling periods. However, with respect to standard thresholds, none of the samples were found to be mutagenic towards the Salmonella typhimurium strain TA98 used.

Graphical abstract: Potential formation of mutagenicity by low pressure-UV/H2O2 during the treatment of nitrate-rich source waters

Back to tab navigation

Supplementary files

Publication details

The article was received on 26 Sep 2017, accepted on 14 Jan 2018 and first published on 23 Jan 2018


Article type: Paper
DOI: 10.1039/C7EW00389G
Citation: Environ. Sci.: Water Res. Technol., 2018, Advance Article
  •   Request permissions

    Potential formation of mutagenicity by low pressure-UV/H2O2 during the treatment of nitrate-rich source waters

    S. Semitsoglou-Tsiapou, M. R. Templeton, N. J. D. Graham, S. Mandal, L. Hernández Leal and J. C. Kruithof, Environ. Sci.: Water Res. Technol., 2018, Advance Article , DOI: 10.1039/C7EW00389G

Search articles by author

Spotlight

Advertisements