Coupling of organic and inorganic aerosol systems and the effect on gas-particle partitioning in the southeastern US.

ABSTRACT: Several models were used to describe the partitioning of ammonia, water, and organic compounds between the gas and particle phases for conditions in the southeastern US during summer 2013. Existing equilibrium models and frameworks were found to be sufficient, although additional improvements in terms of estimating pure-species vapor pressures are needed. Thermodynamic model predictions were consistent, to first order, with a molar ratio of ammonium to sulfate of approximately 1.6 to 1.8 (ratio of ammonium to 2× sulfate, R_N/2S ≈ 0.8 to 0.9) with approximately 70% of total ammonia and ammonium (NH _x ) in the particle. Southeastern Aerosol Research and Characterization Network (SEARCH) gas and aerosol and Southern Oxidant and Aerosol Study (SOAS) Monitor f

SUBMITTER: Pye HOT 

PROVIDER: S-EPMC6020690 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature