Secondary organic aerosol formation from primary aliphatic amines with NO3 radical

摘要

Primary aliphatic amines are an important class of nitrogen containingcompounds emitted from automobiles, waste treatment facilities andagricultural animal operations. A series of experiments conducted at theUC-Riverside/CE-CERT Environmental Chamber is presented in which oxidationof methylamine, ethylamine, propylamine, and butylamine with O andNO have been investigated. Very little aerosol formation isobserved in the presence of O only. However, after addition of NO, andby extension NO, large aerosol mass yields (~44% forbutylamine) are seen. Aerosol generated was determined to be organic innature due to the small fraction of NO and NO in the total signal (1%for all amines tested) as detected by an aerosol mass spectrometer(AMS). We propose a reaction mechanism between carbonyl containing speciesand the parent amine leading to formation of particulate imine products.These findings can have significant impacts on rural communities withelevated nighttime PM loadings, when significant levels of NO exist.