Мақола

Volatility of Organic Aerosol: Evaporation of Ammonium Sulfate/Succinic Acid Aqueous Solution Droplets

Taina Yli‐JuutiDepartment of Physics, University of Helsinki, P.O. Box 64, FI-00014, Helsinki, FinlandAlessandro ZardiniDepartment of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100, Copenhagen, DenmarkAxel ErikssonDepartment of Physics, Lund University, Professorsgatan 1, SE-22100, Lund, SwedenAnne Maria Kaldal HansenDepartment of Chemistry and iNANO, University of Aarhus, Langelandsgade 140, DK-8000, Aarhus C, DenmarkJoakim PagelsErgonomics and Aerosol Technology, Lund University, P.O. Box 118, SE-22100, Lund, SwedenErik SwietlickiDepartment of Physics, Lund University, Professorsgatan 1, SE-22100, Lund, SwedenBirgitta SvenningssonDepartment of Physics, Lund University, Professorsgatan 1, SE-22100, Lund, SwedenMarianne GlasiusDepartment of Chemistry and iNANO, University of Aarhus, Langelandsgade 140, DK-8000, Aarhus C, DenmarkDouglas R. WorsnopAerodyne Research Inc., 45 Manning Road, Billerica, Massachusetts 01821, United StatesIlona RiipinenDepartment of Applied Environmental Science & Bert Bolin Center for Climate Research, Stockholm University, ITM/Stockholms Universitet, SE-10691, Stockholm, SwedenMerete BildeDepartment of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100, Copenhagen, Denmark

Environmental Science & Technologyjournal2013en

ABI

Аннотация

Condensation and evaporation modify the properties and effects of atmospheric aerosol particles. We studied the evaporation of aqueous succinic acid and succinic acid/ammonium sulfate droplets to obtain insights on the effect of ammonium sulfate on the gas/particle partitioning of atmospheric organic acids. Droplet evaporation in a laminar flow tube was measured in a Tandem Differential Mobility Analyzer setup. A wide range of droplet compositions was investigated, and for some of the experiments the composition was tracked using an Aerosol Mass Spectrometer. The measured evaporation was compared to model predictions where the ammonium sulfate was assumed not to directly affect succinic acid evaporation. The model captured the evaporation rates for droplets with large organic content but overestimated the droplet size change when the molar concentration of succinic acid was similar to or lower than that of ammonium sulfate, suggesting that ammonium sulfate enhances the partitioning of dicarboxylic acids to aqueous particles more than currently expected from simple mixture thermodynamics. If extrapolated to the real atmosphere, these results imply enhanced partitioning of secondary organic compounds to particulate phase in environments dominated by inorganic aerosol.

Ҳали таржима қилинмаган

Мавзулар

Atmospheric chemistry and aerosols Air Quality and Health Impacts Atmospheric aerosols and clouds

Идентификаторлар

DOI: 10.1021/es401233c

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