Assessing the influence of environmental conditions on secondary organic aerosol formation from a typical biomass burning compound |
| |
Authors: | Xiaotong Jiang Dantong Liu Li Xu Narcisse T Tson Lin Du |
| |
Institution: | 1. Environment Research Institute, Shandong University, Qingdao 266237, China;2. Department of Atmospheric Sciences, School of Earth Sciences, Zhejiang University, Hangzhou 310027, China |
| |
Abstract: | The atmospheric chemistry in complex air pollution remains poorly understood. In order to probe how environmental conditions can impact the secondary organic aerosol (SOA) formation from biomass burning emissions, we investigated the photooxidation of 2,5-dimethylfuran (DMF) under different environmental conditions in a smog chamber. It was found that SO2 could promote the formation of SOA and increase the amounts of inorganic salts produced during the photooxidation. The formation rate of SOA and the corresponding SOA mass concentration increased gradually with the increasing DMF/OH ratio. The addition of (NH4)2SO4 seed aerosol accelerated the SOA formation rate and significantly shortened the time for the reaction to reach equilibrium. Additionally, a relatively high illumination intensity promoted the formation of OH radicals and, correspondingly, enhanced the photooxidation of DMF. However, the enhancement of light intensity accelerated the aging of SOA, which led to a gradual decrease of the SOA mass concentration. This work shows that by having varying influence on atmospheric chemical reactions, the same environmental factor can affect SOA formation in different ways. The present study is helpful for us to better understand atmospheric complex pollution. |
| |
Keywords: | Corresponding author Secondary organic aerosol formation (SOA) 2 5-Dimethylfuran (DMF) Environmental effect Smog chamber SOA yield |
|
| 点击此处可从《环境科学学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《环境科学学报(英文版)》下载免费的PDF全文 |
|