Implication of Nano/Micron Dicarboxylic Acids Associated with a Size-segregated Suburban Aerosol

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Title:	Implication of Nano/Micron Dicarboxylic Acids Associated with a Size-segregated Suburban Aerosol
Authors:	Ying I. Tsai Chien-Lung Chen Su-Ching Kuo Li-Ying Hsieh
Contributors:	環境工程與科學系
Keywords:	Dicarboxylic acids Mass size sidtributions Cloud condensation nuclei
Date:	2009-08-10
Issue Date:	2011-11-14 16:37:19 (UTC+8)
Abstract:	he distribution of nano/micron dicarboxylic acids in size-segregated suburban aeroslo of southern Taiwan was studied for a PM episode and a non-episodic pollurtion period. Oxalic caid, accounting for 77.3% and 83.9%, respectively, of the total dicarboxylic acid, followed by succinic, malonic, maleic, malic and tartaric acid. The mass emdian aerodynamic diameter (MMAD) of oxalic acid was 0.77um with a bi-modal presence at 0.54um and 18nm during non-episodic pollution and a MMAD of 0.67 um with mono-modal presence at 0.54um in PM episode aerosol. The concomitant formation of oxalic and malonie acid bar tartaric acids were significant nuclei mode species. Nano and condensation mode malic and succinic acids were almost perfectly correlated (r>0.98), suggesting that malic acid accumulated in the atmosphere prior to decomposition into succinic acid.
Relation:	18th International Conference on Nucleation & Atmospheric Aerosols，起迄日：2009/8/10~2009/8/14，地點：Prague
Appears in Collections:	[Dept. of Environmental Engineering and Science (including master's program)] Proceedings

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