Light-absorbing secondary organic material formed by glyoxal in aqueous aerosol mimics
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Light-absorbing secondary organic material formed by glyoxal in aqueous aerosol mimics
Light-absorbing and high-molecular-weight secondary organic products were observed to result from the reaction of glyoxal in mildly acidic (pH=4) aqueous inorganic salt solutions mimicking aqueous tropospheric aerosol particles. High-molecular-weight (500–600 amu) products were observed when ammonium sulfate ((NH4)2SO4) or sodium chloride (NaCl) was present in the aqueous phase. The products fo...
متن کاملSecondary organic material formed by methylglyoxal in aqueous aerosol mimics
We show that methylglyoxal forms lightabsorbing secondary organic material in aqueous ammonium sulfate and ammonium nitrate solutions mimicking tropospheric aerosol particles. The kinetics were characterized using UV-Vis spectrophotometry. The results suggest that the bimolecular reaction of methylglyoxal with an ammonium or hydronium ion is the rate-limiting step for the formation of light-abs...
متن کاملSO material formed by methylglyoxal in aqueous aerosol mimics -- Part 2
Atmospheric Chemistry and Physics Discussions This discussion paper is/has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP if available. Abstract We used chemical ionization mass spectrometry with a volatilization flow tube inlet (Aerosol-CIMS) to characterize secondary organic material formed by methylglyoxal with ...
متن کاملSO material formed by methylglyoxal in aqueous aerosol mimics -- Part 1
Atmospheric Chemistry and Physics Discussions This discussion paper is/has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP if available. Abstract We show that methylglyoxal forms light-absorbing secondary organic material in aque-ous ammonium sulfate and ammonium nitrate solutions mimicking tropospheric aerosol part...
متن کاملGlyoxal processing by aerosol multiphase chemistry: towards a kinetic modeling framework of secondary organic aerosol formation in aqueous particles
This study presents a modeling framework based on laboratory data to describe the kinetics of glyoxal reactions that form secondary organic aerosol (SOA) in aqueous aerosol particles. Recent laboratory results on glyoxal reactions are reviewed and a consistent set of empirical reaction rate constants is derived that captures the kinetics of glyoxal hydration and subsequent reversible and irreve...
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ژورنال
عنوان ژورنال: Atmospheric Chemistry and Physics
سال: 2009
ISSN: 1680-7324
DOI: 10.5194/acp-9-2289-2009