| Title: | Effects of coal chemical industry on atmospheric volatile organic compounds emission and ozone formation in a northwestern Chinese city |
| Author(s): | Chen T; Huang L; Zhang X; Gao R; Li H; Fan K; Ma D; Ma Z; Xue L; Wang W; |
| Address: | "Environment Research Institute, Shandong University, Qingdao 266237, China. Environment Research Institute, Shandong University, Qingdao 266237, China. Electronic address: hliubin@sdu.edu.cn. Environment Research Institute, Shandong University, Qingdao 266237, China; Chinese Research Academy of Environmental Sciences, Beijing 100012, China. Chinese Research Academy of Environmental Sciences, Beijing 100012, China. Electronic address: gaorui@craes.org.cn. Chinese Research Academy of Environmental Sciences, Beijing 100012, China. Yulin Municipal Ecology and Environment Bureau, Yulin 719000, China. Shandong Academy for Environmental Planning, Ji'nan 250101, China. Environment Research Institute, Shandong University, Qingdao 266237, China. Electronic address: xuelikun@sdu.edu.cn" |
| DOI: | 10.1016/j.scitotenv.2022.156149 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
| Abstract: | "Coal is well known as the primary energy consumption in China, and the coal chemical industry (CCI) can serve as an important source of volatile organic compounds (VOCs) emissions. However, the characteristics of VOCs emitted from CCI along with their environmental consequences are still poorly understood. To pin down this, an intensive field campaign was carried out at a typical CCI city in northwestern China (Yulin) from February 26 to March 7, 2021. Results showed that VOC compositions in Yulin were distinct from those in the megacities of China as well as in the typical oilfields over the world. The concentration of naphthalene (1.6 +/- 1.1 ppbv), an important byproduct of CCI, was significantly higher than that in other cities (<0.2 ppbv). Positive matrix factorization (PMF) model analysis revealed that the direct contribution of the CCI source for VOC emissions is 8.8 +/- 1.8%. More importantly, these VOCs emitted from the CCI can account for 17.9 +/- 6.8% of ozone (O(3)) formation potential and 16.9 +/- 7.4% of OH reactivity of VOCs, suggesting the significant impacts of the CCI on the air quality and atmospheric oxidizing capacity. During the observation, a rapid increase in O(3) concentration after a snowfall was encountered. The changing rate of O(3) concentration in the daytime was significantly higher than in its peripheral cities. The increased O(3) formation was partially attributed to the CCI, and this enhancement can be further magnified by snow cover due to the increment of surface albedo. These findings deepen the understanding of the characteristics and air quality impact of VOCs related to the CCI and provide valuable insights for the development of air quality control measures in the region influenced by intensive coal chemical production" |
| Keywords: | *Air Pollutants/analysis Chemical Industry China Cities Coal/analysis Environmental Monitoring/methods *Ozone/analysis Vehicle Emissions/analysis *Volatile Organic Compounds/analysis Coal chemical industry Ozone Photochemical process Source apportionment; |
| Notes: | "MedlineChen, Tianshu Huang, Liubin Zhang, Xin Gao, Rui Li, Hong Fan, Kai Ma, Dun Ma, Zhaokun Xue, Likun Wang, Wenxing eng Netherlands 2022/06/02 Sci Total Environ. 2022 Sep 15; 839:156149. doi: 10.1016/j.scitotenv.2022.156149. Epub 2022 May 26" |
