Articles | Volume 18, issue 12
Atmos. Chem. Phys., 18, 9147–9159, 2018
https://doi.org/10.5194/acp-18-9147-2018

Special issue: Multiphase chemistry of secondary aerosol formation under...

Atmos. Chem. Phys., 18, 9147–9159, 2018
https://doi.org/10.5194/acp-18-9147-2018

Research article 29 Jun 2018

Research article | 29 Jun 2018

Characteristics and mixing state of amine-containing particles at a rural site in the Pearl River Delta, China

Chunlei Cheng et al.

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Short summary
Particulate amines play an important role for the particle acidity and hygroscopicity. We found amines were internally mixed with sulfate and nitrate at a rural site in the PRD, China, suggesting the formation of aminium sulfate and nitrate salts. The ammonium-poor state of amine particles in summer was associated with the low emission sources of ammonia and a possible contribution of ammonium–amine exchange reactions. Amines could be a buffer for the particle acidity of ammonium-poor particles.
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