Characteristics and sources of volatile organic compounds (VOCs) in winter over Nanning of China
LU Jia-hui1, WU Ying1, LIU Hui-lin1, MO Zhao-yu1,2, REN Quan-ming3, HUANG Xi-shou1, HUANG Jiong-li1, YAN Shi-yang1, SONG Ling-he3
1. Scientific Research Academy of Guangxi Environmental Protection, Nanning 530022, China; 2. Department of Environment Science and Engineering, Fudan University, Shanghai 200433, China; 3. School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
Abstract:In order to explore the characteristics and sources of volatile organic compounds (VOCs) pollution in winter, an online continuous monitoring system was used to conduct continuous observation of 116 VOCs in Nanning urban area from December 9, 2020 to February 22, 2021. The results show that the total volume fraction of VOCs was 37.57×10-9, of which alkanes, olefins, aromatic hydrocarbons, OVOCs and halogenated hydrocarbons accounted for 44%, 15%, 8%, 19% and 11%, respectively, generally being low in the daytime and high at night. In view of the OH radical loss rate (LOH) and ozone formation potential (OFP), aldehydes and ketones, aromatic hydrocarbons and olefins were thought to be the main active substances. And aromatic hydrocarbons contributed 98% to the generation of secondary organic aerosols (SOA), of which benzene, m/p-xylene and toluene were the dominant species. Then, VOCs mainly derived from the sources in the order as:vehicle exhaust emissions (30.1%) > stationary combustion and biomass combustion (22.2%) > industrial process emissions (16.8%); while the sources with higher OFP contribution were solvent usee (23.9%), stationary- and biomass combustion (22%), and vehicle exhaust emissions (21.8%). Therefore, the priority for controlling VOCs sources in Nanning winter should be firstly placed on the vehicle exhaust emissions and the stationary- and biomass combustion, followed by industrial process emission sources and solvent use sources.
陆嘉晖, 吴影, 刘慧琳, 莫招育, 任泉明, 黄喜寿, 黄炯丽, 鄢世阳, 宋岭河. 南宁市冬季挥发性有机物特征及其来源分析[J]. 中国环境科学, 2022, 42(8): 3616-3625.
LU Jia-hui, WU Ying, LIU Hui-lin, MO Zhao-yu, REN Quan-ming, HUANG Xi-shou, HUANG Jiong-li, YAN Shi-yang, SONG Ling-he. Characteristics and sources of volatile organic compounds (VOCs) in winter over Nanning of China. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(8): 3616-3625.
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