title: Genotoxic and mutagenic potential of nitramines.
abstract: Climate change is one of the major challenges in the world today. To reduce the amount of CO2 released into the atmosphere, CO2 at major sources, such as power plants, can be captured. Use of aqueous amine solutions is one of the most promising methods for this purpose. However, concerns have been raised regarding its impacts on human health and the environment due to the degradation products, such as nitrosamines and nitramines that may be produced during the CO2 capture process. While several toxicity studies have been performed investigating nitrosamines, little is known about the toxic potential of nitramines. In this study a preliminary screening was performed of the genotoxic and mutagenic potential of nitramines most likely produced during amine based CO2 capture; dimethylnitramine (DMA-NO2), methylnitramine (MA-NO2), ethanolnitramine (MEA-NO2), 2-methyl-2-(nitramino)-1-propanol (AMP-NO2) and piperazine nitramine (PZ-NO2), by the Bacterial Reverse Mutation (Ames) Test, the Cytokinesis Block Micronucleus (CBMN) Assay and the in vitro Single-Cell Gel Electrophoresis (Comet) Assay. MA-NO2 and MEA-NO2 showed mutagenic potential in the Ames test and a weak genotoxic response in the CBMN Assay. AMP-NO2 and PZ-NO2 significantly increased the amount of DNA strand breaks; however, the level of breaks was below background. Most previous studies on nitramines have been performed on DMA-NO2, which in this study appeared to be the least potent nitramine. Our results indicate that it is important to investigate other nitramines that are more likely to be produced during CO2 capture, to ensure that the risk is realistically evaluated.
authors.affiliation: Health Effects Laboratory, MILK, NILU - Norwegian Institute for Air Research, 2007 Kjeller, Norway. Electronic address: lbf@nilu.no.
authors.forename: Lise Marie
authors.initials: LM
authors.lastname: Fjellsbø
authors.affiliation: Flemish Institute for Technological Research (VITO), Environmental Risk and Health Unit, 2400 Mol, Belgium.
authors.forename: Sandra
authors.initials: S
authors.lastname: Verstraelen
authors.affiliation: Institute of Biology, Slovak Medical University (SMU), 833 03 Bratislava, Slovakia.
authors.forename: Alena
authors.initials: A
authors.lastname: Kazimirova
authors.affiliation: Flemish Institute for Technological Research (VITO), Environmental Risk and Health Unit, 2400 Mol, Belgium.
authors.forename: An R
authors.initials: AR
authors.lastname: Van Rompay
authors.affiliation: Health Effects Laboratory, MILK, NILU - Norwegian Institute for Air Research, 2007 Kjeller, Norway.
authors.forename: Zuzana
authors.initials: Z
authors.lastname: Magdolenova
authors.affiliation: Health Effects Laboratory, MILK, NILU - Norwegian Institute for Air Research, 2007 Kjeller, Norway.
authors.forename: Maria
authors.initials: M
authors.lastname: Dusinska
mesh_terms: D000814:Aniline Compounds / Q000633:toxicity*; D020552:Comet Assay; D009153:Mutagens / Q000633:toxicity*; D009578:Nitrobenzenes / Q000633:toxicity*
chemical_list: D000814:Aniline Compounds; D009153:Mutagens; D009578:Nitrobenzenes; C015384:nitramine
keywords: CO(2) capture; Genotoxicity; Health effects; Mutagenicity; Nitramines