| Title: | "[Characteristics and Reactivity of Ambient VOCs in Urban Hangzhou, China]" |
| Author(s): | Jing SA; Gao YQ; Shen JD; Wang Q; Peng YR; Li YJ; Wang HL; |
| Address: | "State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences, Shanghai 200233, China. Hangzhou Environmental Monitoring Central Station, Hangzhou 310007, China" |
| DOI: | 10.13227/j.hjkx.202004021 |
| ISSN/ISBN: | 0250-3301 (Print) 0250-3301 (Linking) |
| Abstract: | "The ambient concentration of 122 volatile organic compound (VOC) species were continuously measured in urban Hangzhou, China from May 2018 to April 2019. The average mixing ratio of VOCs was (59.4+/-23.6)x10(-9) and the oxygenated VOCs (OVOC) were the largest component. There was no clear 'weekend effect' in urban Hangzhou, while the concentration of VOCs had a sharp decrease during long holidays. The concentration of VOCs had a positive correlation with air quality index (AQI) and reached the highest level when the primary pollutant was PM(2.5). The assessment results of atmospheric chemical reactivity with.OH radical loss rate (L(.OH)) and ozone formation potential (OFP) showed the average value of L(.OH) was 7.5 s(-1) and that of OFP was 152.1x10(-9), among which carbonyl compounds, aromatics, and alkenes were the most abundant components. The overall chemical reactivity level of VOCs in Hangzhou was equivalent to 2-methylpentane. The average value of toluene/benzene (T/B) was 1.95, which implied the ambient VOCs in Hangzhou were influenced by vehicle exhaust. Secondary formation (17.6%), combustion (11.8%), industrial processing (12.3%), solvent use (18.1%), biogenic source (4.5%), and vehicle exhaust (35.7%) were identified as six major sources of VOCs in Hangzhou through the positive matrix factorization (PMF) model" |
| Keywords: | air quality index (AQI) chemical reactivity ozone formation potential(OFP) source apportionment volatile organic compounds (VOCs) .OH radical loss rate(L.OH); |
| Notes: | "PubMed-not-MEDLINEJing, Sheng-Ao Gao, Ya-Qin Shen, Jian-Dong Wang, Qian Peng, Ya-Rong Li, Ying-Jie Wang, Hong-Li chi English Abstract China 2020/12/30 Huan Jing Ke Xue. 2020 Dec 8; 41(12):5306-5315. doi: 10.13227/j.hjkx.202004021" |
