Report

Atmospheric Degradation of Amines (ADA). Summary report: Photo-oxidation of methylamine, dimethylamine and trimethylamine. CLIMIT project no. 201604. NILU OR

Nielsen, C.J.; D'Anna, B.; Karl, M.; Aursnes, M.; Boreave, A.; Bossi, R.; Bunkan, A.J.C.; Glasius, M.; Hallquist, M.; Hansen, A.M.K.; Kristensen, K.; Mikoviny, T.; Maguta, M.M.; Müller, M.; Nguyen, Q.; Westerlund, J.; Salo, K.; Skov, H.; Stenstrøm, Y.; Wisthaler, A.

The atmospheric gas phase photo-oxidation of methylamine (CH3NH2), dimethylamine ((CH3)2NH) and trimethylamine ((CH3)3N) has been studied under pseudo natural conditions at the European Photochemical Reactor, EUPHORE, in Valencia, Spain. Major products in the photo-oxidation were imines (methanimine and N-methyl-methanimine) and amides (formamide, N-methyl formamide and N,N-dimethyl formamide). Total aerosol yields obtained in EUPHORE experiments were between 8 and 14%. Mimicking conditions at Mongstad results in a steady-state nitrosamine concentration of less than 0.6 % of photo-oxidized dimethylamine and less than 1.1 % of photo-oxidized trimethylamine. For rural regions it is predicted that the formation yield of the corresponding nitramine in the atmospheric oxidation of CH3NH2, (CH3)2NH and (CH3)3N is less than 0.4 %, 2.5 % and 5 %, respectively. The major uncertainties in the current understanding of the fate of amines emitted to the atmosphere are related to night-time chemistry, to the chemistry of imines, and to chemistry in the aqueous aerosol.

Dispersion calculations of NO2 emisson and stack height calculations from a gas and biofueled incinerator at Nydalen, Oslo. NILU OR

Haugsbakk, I.; Tønnesen, D.

Akrylamid i næringsmidler 2009.

Dye, C.; Bjerke, A.

Results from the Swedish national screening programme 2008. Subreport 4: Screening of unintentionally produced organic contaminants. IVL Report B1944

Brorström-Lundén, E.; Remberger, M.; Kaj, L.; Hansson, K.; Palm-Cousins, A.; Andersson, H.; Haglund, P.; Ghebremeskel, M.; Schlabach, M.

Atmospheric Degradation of Amines (ADA). Amines in aerosol - A review. CLIMIT project no. 201604. NILU OR

Karl, M.

This report presents a comprehensive review of current literature on the abundance of amines in atmospheric aerosols. The review spans over the whole life cycle of aerosols, showing the relevance of amine-related aerosol dynamic processes in each stage of the cycle. Amine compounds can constitute a siginificant fraction of submicron ambient aerosols, in particular in urban air and close to agricultural sources. It is evident from both field experiments and computational studies that amines have the propensity to contribute to new particle formation. Particulate phase oxidation of amines leads to the formation of potentially toxic products such as imines and nitrosamines. In general, there is a lack of information about the acute and chronic toxic effects of particulate amides and imines, and also the chemical mechanisms leading to their formation in aerosol particles are currently not fully understood.