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Title: Effects of temperature on the formation of secondary organic aerosol from amine precursors

Author
item PRICE, DEREK - University Of California
item KACARAB, MARY - University Of California
item COCKER, DAVID - University Of California
item PURVIS-ROBERTS, KATHLEEN - Claremont Colleges
item Silva, Philip - Phil

Submitted to: Aerosol Science and Technology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 9/2/2016
Publication Date: 9/16/2016
Citation: Price, D.J., Kacarab, M.E., Cocker, D.R., Purvis-Roberts, K.L., Silva, P.J. 2016. Effects of temperature on the formation of secondary organic aerosol from amine precursors. Atmospheric Environment. 50(11):1216-1226. doi:10.1080/02786826.2016.1236182.

Interpretive Summary: Amines are a class of volatile organic compounds emitted from waste management methods; they are carbon-containing analogues to ammonia that can participate in atmospheric chemistry to produce particulate matter. There is significant uncertainty about the emissions of amines, the chemistry of amines in the atmosphere, and the properties of aerosols produced by atmospheric reactions. This study describes the temperature dependence of particulate forming reactions from amines. In general, more aerosol is produced at lower temperatures, especially from acid-base chemistry. These data indicate that agricultural emissions of amines and their contributions to particulate matter are going to be more important during wintertime temperatures than during summertime conditions.

Technical Abstract: Aerosol formation is directly influenced by meteorological properties such as temperature and relative humidity. Temperature, for example, directly affects the gas-to-particle partitioning of amine salts and semi-volatile organic amine products. These salts are formed in areas with high agricultural and combustion emissions. Along with seasonal and regional temperature variations, there is significant temperature variation within the vertical temperature profile of the atmosphere. This study examines the influence of temperature on the physical properties and chemical composition of the aerosol produced from radical oxidation of aliphatic amines. Aerosol formation for temperatures ranging from 10 to 40°C were investigated in the dual 90 m3 indoor environmental chambers at the University of California Riverside. Chemical and physical responses of aerosol formed at one temperature and then raised/cooled to another are investigated in detail. Primary, secondary, and tertiary aliphatic amines were chosen for this study to represent a range of emissions from agricultural facilities.