| 厦门城区大气颗粒物PM10中有机酸源谱特征分析 |
| 摘要点击 2752 全文点击 1635 投稿时间：2012-03-01 修订日期：2012-05-04 |
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| 中文关键词 可吸入颗粒物 有机酸 再悬浮装置 源谱特征 来源分析 |
| 英文关键词 PM10 organic acids re-suspension test chamber source composition source identification |
| 作者 | 单位 | E-mail | | 杨冰玉 | 厦门大学近海海洋环境科学国家重点实验室,厦门 361005
厦门大学环境与生态学院,厦门 361005 | yangbingyu0505@126.com | | 黄星星 | 厦门大学近海海洋环境科学国家重点实验室,厦门 361005
厦门大学环境与生态学院,厦门 361005 | | | 郑桉 | 厦门大学近海海洋环境科学国家重点实验室,厦门 361005
厦门大学环境与生态学院,厦门 361005 | | | 刘碧莲 | 厦门大学近海海洋环境科学国家重点实验室,厦门 361005
厦门大学环境与生态学院,厦门 361005 | | | 吴水平 | 厦门大学近海海洋环境科学国家重点实验室,厦门 361005
厦门大学环境与生态学院,厦门 361005 | wsp@xmu.edu.cn |
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| 中文摘要 |
| 对厦门城区大气颗粒物PM10中有机酸的可能来源,如烹调油烟、生物质燃烧颗粒、汽车尾气和土壤/路面扬尘等4种不同排放源,采用再悬浮混合箱得到PM10样品. 采用BF3/正丁醇衍生-GC/MS分析方法,测定了包括二元羧酸、脂肪酸和芳香酸共15种有机酸. 结果表明,烹调油烟中有机酸的含量远高于其它颗粒物,最高可达53%,其中亚油酸和油酸的含量最高,为24%±14%; 而汽车尾气颗粒物中乙二酸的含量最高,其次为邻苯二甲酸Ph; 汽油燃烧颗粒物中己二酸与壬二酸的比值显著高于其它样品,可用于环境大气中二元羧酸的人为和生物来源的定性判断. 除发电机排放样品外,其它样品中丙二酸与丁二酸的比值(0.07~0.44)远低于环境样品中该比值范围(0.61~3.93),表明丙二酸与丁二酸的比值可用于环境大气中二元羧酸的一次/二次来源的定性判断. |
| 英文摘要 |
| The possible organic acid emission sources in PM10 in Xiamen urban atmosphere such as cooking, biomass burning, vehicle exhaust and soil/dust were obtained using a re-suspension test chamber. A total of 15 organic acids including dicarboxylic acids, fatty acids and aromatic acids were determined using GC/MS after derivatization with BF3/n-butanol. The results showed that the highest total concentration of 15 organic acids (53%) was found in cooking emission and the average concentration of the sum of linoleic acid and oleic acid was 24%±14%. However, oxalic acid was the most abundant species followed by phthalic acid in gasoline vehicle exhaust. The ratios of adipic to azelaic acid in gasoline combustion emissions were significantly higher than those in other emission sources, which can be used to qualitatively differentiate anthropogenic and biological source of dicarboxylic acids in atmospheric samples. The ratios of malonic to succinic acid in source emissions (except gasoline generator emissions) were lower (0.07-0.44) than ambient PM10samples (0.61-3.93), which can be used to qualitatively differentiate the primary source and the secondary source of dicarboxylic acids in urban PM10. |
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