| Title: | [Pollution Characteristics and Source Apportionment of Atmospheric Volatile Organic Compounds in Summer in Yuncheng City] |
| Author(s): | Wen XY; Zhao WT; Luo SZ; Zhang Q; Wang YT; Ma JJ; Liu XG; |
| Address: | "College of Urban and Environmental Science, Northwestern University, Xi'an 710127, China. School of Environment, Beijing Normal University, Beijing 100875, China" |
| DOI: | 10.13227/j.hjkx.202109134 |
| ISSN/ISBN: | 0250-3301 (Print) 0250-3301 (Linking) |
| Abstract: | "Based on the online monitoring data of VOCs, O(3), and NO(2) in Yuncheng City from June to August 2020, the pollution characteristics of VOCs in Yuncheng City in summer were analyzed. At the same time, the main emission sources were determined using a PMF model, and the chemical reactivity of VOCs was evaluated using the maximum incremental reactivity (MIR) method and fractional aerosol coefficients (FAC). The results showed that the urban area of Yuncheng was seriously polluted by VOCs and NO(2) in the early morning and evening during summer, the peak value of VOCs daily variation occurred at 08:00 and 20:00, respectively, and was mainly affected by the morning and evening peaks in traffic. The rho(VOCs) from June to August was 50.52 mug.m(-3), and the species with the highest proportion were alkanes (39.39%) and oxygenated volatile organic compounds (OVOCs, 34.63%). Five VOCs emission sources were determined by the PMF model, of which the largest contribution was from motor vehicle exhaust emission sources (33.10%), followed by industrial emission sources (29.46%), natural gas and coal combustion sources (17.31%), solvent use sources (11.94%), and plant emission sources (8.19%). Controlling motor vehicle exhaust emission sources is the key to alleviate VOCs pollution in summer in Yuncheng City. The average ozone formation potential (OFP) of VOCs was 162.88 mug.m(-3), in which OVOCs had the highest contribution rate (45.37%); acetaldehyde, propionaldehyde, ethylene, isoprene, and toluene were the key active components; and industrial emission sources were the emission sources with the highest contribution rate. The average value of secondary organic aerosol formation potential (SOA(p)) of VOCs was 0.40 mug.m(-3), in which the contribution rate of aromatic hydrocarbons was the highest (88.00%), and the solvent use source was the emission source with the highest contribution rate" |
| Keywords: | *Air Pollutants/analysis China Environmental Monitoring/methods Nitrogen Dioxide *Ozone/analysis Solvents Vehicle Emissions/analysis *Volatile Organic Compounds/analysis ozone formation potential(OFP) pollution characteristics secondary organic aerosol fo; |
| Notes: | "MedlineWen, Xiao-Yu Zhao, Wen-Ting Luo, Shu-Zhen Zhang, Qiang Wang, Yun-Tao Ma, Jun-Jie Liu, Xin-Gang chi China 2022/06/11 Huan Jing Ke Xue. 2022 Jun 8; 43(6):2979-2986. doi: 10.13227/j.hjkx.202109134" |
