| Title: | Temporal and spatial discrepancies of VOCs in an industrial-dominant city in China during summertime |
| Author(s): | Li B; Ho SSH; Qu L; Gong S; Ho KF; Zhao D; Qi Y; Chan CS; |
| Address: | "Langfang Academy of Eco Industrialization for Wisdom Environment, Langfang, 065000, China; Department of Environmental Engineering, College of Environment and Resource, Zhejiang University, Hangzhou, 310058, China. Division of Atmospheric Sciences, Desert Research Institute, Reno, NV, USA; Hong Kong Premium Services and Research Laboratory, Kowloon, Hong Kong, China; Voltech Analytical and Technology Center, Shenzhen, China. Electronic address: stevenho@hkpsrl.org. Hong Kong Premium Services and Research Laboratory, Kowloon, Hong Kong, China; Voltech Analytical and Technology Center, Shenzhen, China. Langfang Academy of Eco Industrialization for Wisdom Environment, Langfang, 065000, China; Center for Atmosphere Watch and Services of CMA, Chinese Academy of Meteorological Sciences, Beijing, 100081, China. Electronic address: gongsl@cma.gov.cn. The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China. Langfang Academy of Eco Industrialization for Wisdom Environment, Langfang, 065000, China. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China" |
| DOI: | 10.1016/j.chemosphere.2020.128536 |
| ISSN/ISBN: | 1879-1298 (Electronic) 0045-6535 (Linking) |
| Abstract: | "Ozone (O(3)) pollution is currently problematic to cities across the globe. Many non-methane hydrocarbons (NMHCs) are efficient O(3) precursors. In this study, target volatile organic compounds (VOCs), including oxygenated VOCs (known as carbonyls), were monitored at eight sampling sites distributed in urban and suburban in the typical and industrial-dominant city of Shaoxing, Zhejiang province, China. At the suburban sites, C(8)-C(12) alkanes, aromatics with lower reactivity (k(OH) <13 x 10(-12) cm(3) mol(-1) s(-1)) and acetonitrile were more abundant than urban ones due to higher emissions from diesel-fueled trucks and biomass burning. In general, higher abundances of total quantified NMHCs (SigmaNMHC) were found on high O(3) (HO) days. The increments of formaldehyde (C(1)) and O(3) were higher in urban than suburban, while a reverse trend was seen for acetaldehyde (C(2)). Substantial and local biogenic inputs of C(2) were found in suburban in the afternoon when both temperature and light intensity reached maximum of the day. In urban, higher increment was found for O(3) than the carbonyls, representing that the secondary formation of O(3) was more efficient. Distance decay gradient of most representative NMHCs were positively correlated to the distances from a westernmost industrial origin located at the upwind location. The net loss rates of the NMHCs ranged from -0.009 to -0.11 ppbv km(-1), while the higher rates were seen for the most reactive species like C(2)-C(4) alkenes. The results and interpretation of this study are informative to establish efficient local control measures for O(3) and the related percussors for the microscale industrial cities in China" |
| Keywords: | *Air Pollutants/analysis China Cities Environmental Monitoring *Ozone/analysis *Volatile Organic Compounds/analysis Industrial emission NMHCs O(3) OVOCs Secondary formation; |
| Notes: | "MedlineLi, Bowei Ho, Steven Sai Hang Qu, Linli Gong, Sunling Ho, Kin Fai Zhao, Dongxu Qi, Yijin Chan, Chi Sing eng England 2020/10/14 Chemosphere. 2021 Feb; 264(Pt 2):128536. doi: 10.1016/j.chemosphere.2020.128536. Epub 2020 Oct 6" |
