Formation of secondary organic particle phase compounds from isoprene gas-phase oxidation products:: An aerosol chamber and field study

被引：84

作者：

Böge, O ^{[1
]}

Miao, Y ^{[1
]}

Plewka, A ^{[1
]}

Herrmann, H ^{[1
]}

机构：

[1] Leibniz Inst Tropospharenforsch, D-04318 Leipzig, Germany

来源：

ATMOSPHERIC ENVIRONMENT | 2006年 / 40卷 / 14期

关键词：

secondary organic aerosol; isoprene; acidic seed particles; chamber experiments; 2-methylthreitol; 2-methylerythritol;

D O I：

10.1016/j.atmosenv.2005.12.025

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Acid-catalyzed multiphase reactions of isoprene with hydrogen peroxide have been suggested to produce hydroxylated oxidation products, namely the diastereoisomeric 2-methyltetrols (2-methylthreitol and 2-methylerythritol), compounds which were found quite recently in aerosols above forests. In this study aerosol chamber experiments have been performed reacting isoprene or known isoprene oxidation products with hydrogen peroxide in the presence of acidic particles. Starting from isoprene, 2-methyl-3-btttene-1,2-diol or 2-methyl-2-vinyloxirane the formation of the 2-methyltetrols could be observed. The reaction was most effective for 2-methyl-2-vinyloxirane. The last process can lead to an annual 2-methyltetrol formation in atmospheric particles of about 1 Tg C. Additionally, results from size segregated 2-methyltetrol measurements in Melpitz site (Germany) are presented. The concentrations are between 0.5 and 1.7 ng m(-3). The 2-methyltetrols are enriched in the fine size fraction as expected for secondary organic aerosol compounds. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：2501 / 2509

页数：9

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