Articles | Volume 17, issue 20
Atmos. Chem. Phys., 17, 12797–12812, 2017
https://doi.org/10.5194/acp-17-12797-2017
Atmos. Chem. Phys., 17, 12797–12812, 2017
https://doi.org/10.5194/acp-17-12797-2017

Research article 27 Oct 2017

Research article | 27 Oct 2017

Hygroscopic behavior and chemical composition evolution of internally mixed aerosols composed of oxalic acid and ammonium sulfate

Xiaowei Wang et al.

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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Maofa Ge on behalf of the Authors (04 Sep 2017)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (05 Sep 2017) by Markus Petters
RR by Anonymous Referee #1 (22 Sep 2017)
ED: Publish subject to technical corrections (26 Sep 2017) by Markus Petters
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Short summary
Our results reveal the formation of NH4HC2O4 and NH4HSO4 from the reaction of oxalic acid (OA) with ammonium sulfate within aerosols during the slow dehydration compared to the rapid dehydration process. The hygroscopic growth of mixed particles at high RH upon hydration is substantially lower than that of the corresponding dehydration process due to the significant formation of low hygroscopic NH4HC2O4 and residual OA. These findings have important implications for atmospheric chemistry.
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