| Title: | Biomass-burning emissions could significantly enhance the atmospheric oxidizing capacity in continental air pollution |
| Author(s): | Zhu B; Huang XF; Xia SY; Lin LL; Cheng Y; He LY; |
| Address: | "Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China. Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China. Electronic address: huangxf@pku.edu.cn" |
| DOI: | 10.1016/j.envpol.2021.117523 |
| ISSN/ISBN: | 1873-6424 (Electronic) 0269-7491 (Linking) |
| Abstract: | "Volatile organic compounds (VOCs) are important precursors of photochemical pollution. However, a substantial fraction of VOCs, namely, oxygenated VOCs (OVOCs), have not been sufficiently characterized to evaluate their sources in air pollution in China. In this study, a total of 119 VOCs, including 60 OVOCs in particular, were monitored to provide a more comprehensive picture based on different online measurement techniques, proton-transfer-reaction time-of-flight mass spectrometry (PTR-ToF-MS) and online gas chromatography/mass spectrometry (GC/MS), at a receptor site in southeastern China during a photochemically active period. Positive matrix factorization (PMF) and photochemical age-based parameterization were combined to identify and quantify different sources of major VOCs during daytime hours, with the advantage of including VOC decay processes. The results revealed the unexpected role of biomass burning (21%) in terms of ozone (O(3)) formation potential (OFP) when including the contributions of OVOCs and large contributions (30-32%) of biomass burning to aldehydes, as more OVOCs were measured in this study. We argue that biomass burning could significantly enhance the continental atmospheric oxidizing capacity, in addition to the well-recognized contributions of primary pollutants, which should be seriously considered in photochemical models and air pollution control strategies" |
| Keywords: | *Air Pollutants/analysis *Air Pollution Biomass China Environmental Monitoring Oxidation-Reduction *Ozone/analysis *Volatile Organic Compounds/analysis Atmospheric oxidizing capacity Biomass burning Oxygenated volatile organic compounds (OVOCs) Proton-tra; |
| Notes: | "MedlineZhu, Bo Huang, Xiao-Feng Xia, Shi-Yong Lin, Li-Liang Cheng, Yong He, Ling-Yan eng England 2021/08/13 Environ Pollut. 2021 Sep 15; 285:117523. doi: 10.1016/j.envpol.2021.117523. Epub 2021 Jun 4" |
