| Title: | Source profiles and reactivity of volatile organic compounds from anthropogenic sources of a megacity in southwest China |
| Author(s): | Zhou Z; Tan Q; Deng Y; Lu C; Song D; Zhou X; Zhang X; Jiang X; |
| Address: | "College of Architecture and Environment, Sichuan University, Chengdu 610065, China; Chengdu Academy of Environmental Sciences, Chengdu 610072, China. Chengdu Academy of Environmental Sciences, Chengdu 610072, China. College of Architecture and Environment, Sichuan University, Chengdu 610065, China; National Engineering Research Center for Flue Gas Desulfurization, Sichuan University, Chengdu 610065, China. Electronic address: xjiang@scu.edu.cn" |
| DOI: | 10.1016/j.scitotenv.2021.148149 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
| Abstract: | "Volatile organic compounds (VOCs) from anthropogenic sources are deleterious to air quality, climate, human health and vegetation. However, research on VOCs source profiles of the non-solvent use in some industries and the emission characteristics of motor vehicles under actual road conditions is limited in China. In this research, VOCs source profiles of industries (wood-based panel manufacturing and pharmacy) based on all product processes were constructed, and those of light and medium duty vehicles exhaust based on actual road conditions at different speeds were acquired in Chengdu, a megacity in southwest China. The results show that VOCs groups of various sources were dominated by oxygenated VOCs (OVOCs), which accounted for 27-84% of the total VOCs emission. Due to the great contribution of OVOCs to industrial source reactivity (SR), attention should be paid to the control over the emissions of the species with high reactivity, such as aromatics and alkenes, but also to the production processes with relatively large proportions of OVOCs species emission. VOCs emissions from gasoline and diesel vehicles running at a speed ranging from 0 to 40 km/h have approximately the same ozone formation potential (OFP), while the contribution of VOCs emission from diesel vehicles to the formation of urban ozone pollution deserves further attention. It is found that VOCs emission characteristics of some industries in China have changed as the upgrading of production processes in automobile manufacturing and other industries, such as the extensive use of water-based coatings instead of outdated solvent-based coatings, which increased the uncertainty of judgment parameters (B/T ratio, etc.) in source apportionment research. The ranges of B/T ratio of industrial process sources, solvent use sources and motor vehicles are 0.00-0.23, 0.01-0.75 and 0.35-0.92, respectively. Therefore, updating existing source profiles and further understanding the emission constitutions of characteristic species in these source profiles (such as BTEX ratio) will be conducive to further research on emission inventory, source apportionment for O(3) pollution control effectively" |
| Keywords: | *Air Pollutants/analysis China Environmental Monitoring Humans *Ozone/analysis Vehicle Emissions/analysis *Volatile Organic Compounds/analysis Actual road condition Anthropogenic sources Ozone formation potential (OFP) Production process-based Source prof; |
| Notes: | "MedlineZhou, Zihang Tan, Qinwen Deng, Ye Lu, Chengwei Song, Danlin Zhou, Xiaoling Zhang, Xin Jiang, Xia eng Netherlands 2021/08/13 Sci Total Environ. 2021 Oct 10; 790:148149. doi: 10.1016/j.scitotenv.2021.148149. Epub 2021 May 29" |
