Atmos. Chem. Phys. Discuss., 8, 12695-12720, 2008
© Author(s) 2008. This work is distributed
under the Creative Commons Attribution 3.0 License.
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This discussion paper has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP.
Secondary organic aerosol formation from primary aliphatic amines with NO3 radical
Q. G. J. Malloy1,2, Li Qi1,2, B. Warren1,2, D. R. Cocker III1,2, M. E. Erupe3, and P. J. Silva3
1University of California-Riverside, Bourns College of Engineering, Department of Chemical and Environmental Engineering, Riverside, California 92521-0001, USA
2Bourns College of Engineering, Center for Environmental Research and Technology (CE-CERT), USA
3Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hall, Logan Utah 84322-0300, USA

Abstract. Primary aliphatic amines are an important class of nitrogen containing compounds found to be emitted from automobiles, waste treatment facilities and agricultural animal operations. A series of experiments conducted at the UC-Riverside/CE-CERT Environmental Chamber is presented in which oxidation of methylamine, ethylamine, propylamine, and butylamine with NO3 has been investigated. Very little aerosol formation is observed in the presence of O3 only. However, after addition of NO, and by extension NO3, large yields of aerosol mass loadings (~44% for butylamine) are seen. Aerosol generated was determined to be organic in nature due to the small fraction of NO and NO2 in the total signal (<17% for all amines tested) as detected by an aerosol mass spectrometer (AMS). We propose a reaction mechanism between carbonyl containing species and the parent amine leading to formation of particulate imine products. These findings can have significant impacts on rural communities and lead to elevated nighttime PM loadings, when significant levels on NO3 exist.

Citation: Malloy, Q. G. J., Li Qi, Warren, B., Cocker III, D. R., Erupe, M. E., and Silva, P. J.: Secondary organic aerosol formation from primary aliphatic amines with NO3 radical, Atmos. Chem. Phys. Discuss., 8, 12695-12720, doi:10.5194/acpd-8-12695-2008, 2008.
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