We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Induced Genotoxicity in Nitrate-Rich Water Treated With Medium-Pressure Ultraviolet Processes.
- Authors
MARTIJN, BRAM J.; KRUITHOF, JOOP C.; HUGHES, RAEANNA M.; MASTAN, RAUL A.; VAN ROMPAY, AN R.; MALLEY JR., JAMES P.
- Abstract
Just as with chlorination, medium-pressure (MP) ultraviolet (UV) treatment applied for disinfection purposes has been found to cause formation of genotoxic compounds, measured by the Ames test. By lowering the nitrate and dissolved organic carbon (DOC) content, the Ames test response was reduced substantially. The impact of nitrate photolysis on formation of genotoxic compounds was confirmed. A representative organic micropollutant selection had no significant impact on the Ames test response. Formation of genotoxic compounds was found after MP UV disinfection, photolysis, and advanced oxidation of pretreated groundwater. In addition to nitrate and DOC content, aromaticity of organic matter had a strong impact. Ames test responses were converted into 4-nitroquinoline oxide (4-NQO) equivalent concentrations to enable quantitative comparison and to apply simple risk assessment. Based on the threshold for toxicological concern, already at doses applied for MP UV disinfection, the 4-NQO equivalent concentration of formed genotoxic compounds in nitrate-rich water exceeded the limit of no risk.
- Subjects
WATER chlorination; ULTRAVIOLET water treatment; WATER disinfection; AMES test; NITROQUINOLINE oxide
- Publication
Journal: American Water Works Association, 2015, Vol 107, Issue 6, pE301
- ISSN
0003-150X
- Publication type
Article
- DOI
10.5942/jawwa.2015.107.0079