Carboxylic acids in PM2.5 over Pinus morrisonicola forest and related photoreaction

doi:10.1016/j.atmosenv.2011.08.007

CNU IR > Pharmacy and Science > Dept. of Food & Drug Industry and Inspective Technology > Periodical Articles > Item 310902800/27029

Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/27029

Title:	Carboxylic acids in PM2.5 over Pinus morrisonicola forest and related photoreaction
Authors:	Kuo, Su-Ching Ying, I.Tsai Tsai, Cheng-Hsien Hsieh, Li-Ying
Contributors:	醫藥化學系環境工程與科學系
Keywords:	Carboxylic acids Coniferous forest Raman spectroscopy Photooxidation Maleic acid Tartaric acid
Date:	2011-12
Issue Date:	2013-10-23 15:21:24 (UTC+8)
Publisher:	Elsevier
Abstract:	The PM2.5 aerosol from within an area of Pinus morrisonicola Hayata in Taiwan was collected and analyzed for its low molecular weight carboxylic acid (LMWCAs) content. Oxalic acid was the major LMWCA in the aerosol, followed by acetic, tartaric and maleic acids. This differs significantly from the LMWCA composition of PM2.5 aerosol reported for a southern Taiwan suburban region (oxalic > succinic > malonic) [Atmospheric Environment 42, 6836-6850 (2008)]. P. morrisonicola Hayata emits oxalic, malic and formic acids and yet there was an abundance of maleic and tartaric acids in the PM2.5 forest aerosol, indicating that tartaric acid is derived from the transformation of other P. morrisonicola Hayata emissions. Raman spectroscopy was applied and 28 species of LMWCAs and inorganic species were identified. The photochemical mechanisms of maleic and tartaric acids were studied and it was found that the abundant tartaric acid in forest aerosol is most probably the photochemical product from reactions of maleic acid. Furthermore, tartaric acid is photochemically transformed into formic acid and ultimately into CO2. (C) 2011 Elsevier Ltd. All rights reserved.
Relation:	Atmospheric Environment, 45(37), pp.6741-6750
Appears in Collections:	[Dept. of Food & Drug Industry and Inspective Technology] Periodical Articles [Dept. of Environmental Engineering and Science (including master's program)] Periodical Articles

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