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


    標題: Carboxylic acids in PM2.5 over Pinus morrisonicola forest and related photoreaction
    作者: Kuo, Su-Ching
    Ying, I.Tsai
    Tsai, Cheng-Hsien
    Hsieh, Li-Ying
    貢獻者: 醫藥化學系
    環境工程與科學系
    關鍵字: Carboxylic acids
    Coniferous forest
    Raman spectroscopy
    Photooxidation
    Maleic acid
    Tartaric acid
    日期: 2011-12
    上傳時間: 2013-10-23 15:21:24 (UTC+8)
    出版者: Elsevier
    摘要: 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.
    關聯: Atmospheric Environment, 45(37), pp.6741-6750
    Appears in Collections:[醫藥化學系 ] 期刊論文
    [環境工程與科學系(所)] 期刊論文

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