Results 121 to 130 of about 2,581 (174)

An Enhanced Metabolization Protocol for In Vitro Genotoxicity Assessment of N-Nitrosamines in Mammalian Cells. [PDF]

Environ Mol Mutagen
Geijer ME, Gernaat AM, Moelijker N, Brandsma I, Hendriks G.   +4 more
europepmc   +1 more source

Breakpoint Chlorination Chemistry in a Chlorine-Cyanurate System and Trade-Offs between Nitrosamine Formation and Micropollutant Removals. [PDF]

Environ Sci Technol
Chuang YH, Chou CS, Chu YL, Chiang YP.
europepmc   +1 more source

Investigating disater risk management and climate change adaptation effectiveness in freetown, Sierra Leone.

Jamba
Sam-Mbomah E, Chmutina K, Smith A, Goodall S, Bosher L.   +4 more
europepmc   +1 more source

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Occurrence and removal of NDMA and NDMA formation potential in wastewater treatment plants

Journal of Hazardous Materials, 2011
N-Nitrosodimethylamine (NDMA) is a potent carcinogen that is formed during disinfection by chlorination or ozonation in wastewater treatment plants (WWTPs). At present, little is known about the occurrence and fate of NDMA and its formation potential (FP) during wastewater treatment. We investigated the fate of NDMA and NDMA FP in 12 WWTPs.
Hiroaki Tanaka, Norihide Nakada
exaly   +3 more sources

A nationwide survey of NDMA in raw and drinking water in Japan

Science of the Total Environment, 2009
A nationwide survey of N-nitrosodimethylamine (NDMA) in both raw and finished water samples from drinking water treatment plants (DWTPs) in Japan was conducted. NDMA was analyzed by solid-phase extraction (SPE) followed by ultra performance liquid chromatography (UPLC) coupled with tandem mass spectrometry (MS/MS).
Koji Kosaka, Mari Asami
exaly   +3 more sources

The effect of pre-oxidation on NDMA formation and the influence of pH

Water Research, 2014
N-nitrosodimethylamine (NDMA), a probable human carcinogen, is a disinfection by-product that has been detected in chloraminated drinking water systems. Pre-oxidation of the NDMA precursors prior to chloramination can be a viable approach for water utilities to control the NDMA levels. This study examined the effects of (i) commonly used oxidants (i.e.,
Daekyun Kim, Tanju Karanfil, Meric Selbes   +2 more
exaly   +3 more sources

NDMA and NDMA precursor attenuation in environmental buffers prior to groundwater recharge for potable reuse

Science of The Total Environment, 2021
Natural attenuation of N-nitrosodimethylamine (NDMA) and NDMA precursors was evaluated in infiltration basins, a riverbed filtration system, and constructed wetlands operated as part of a managed aquifer recharge system. Initial NDMA concentrations up to 9.0 ng/L in infiltration basins (advanced purified, recycled water) before sunrise declined to non ...
Robert, Reny, Megan H, Plumlee, Hitoshi, Kodamatani, I H Mel, Suffet, Shannon L, Roback   +4 more
openaire   +2 more sources

NDMA formation in secondary wastewater effluent

Chemosphere, 2013
Concern over prospective levels of N-nitrosodimethylamine (NDMA) in waters has increased in recent years due to its disinfection byproduct formation potential from chloramination. It has been mooted that this is promoted by organic precursors from municipal wastewaters, such that there is a more significant risk of excessive levels in water reuse ...
J W, Hatt, C, Lamy, E, Germain, M, Tupper, S J, Judd   +4 more
openaire   +2 more sources

Oxidation of N-Nitrosodimethylamine (NDMA) Precursors with Ozone and Chlorine Dioxide:  Kinetics and Effect on NDMA Formation Potential

Environmental Science & Technology, 2007
The oxidation of N-nitrosodimethylamine (NDMA) precursors chlorine dioxide (ClO2). Second-order rate constants for the reactions of model NDMA precursors (dimethylamine (DMA) and 7 tertiary amines) with ozone (kapp at pH 7 = 2.4 x 10(-1) to 2.3 x 10(9) M(-1) s(-1)), ClO2 (kapp at pH 7 = 6.7 x 10(-3) to 3.0 x 10(7) M(-1) s(-1)), and hydroxyl radical ...
Lee, Changha, Schmidt, Carsten, Yoon, Jeyong, von Gunten, Urs   +3 more
openaire   +7 more sources