标题: The chemical characteristics and sources of formaldehyde on O<sub>3</sub> and non-O<sub>3</sub> polluted days in Wuhan, central China
作者: Huang, HB (Huang, Haibin); Yang, CM (Yang, Chunmian); Wang, ZQ (Wang, Zhaoqi); Lian, SZ (Lian, Shize); Li, XX (Li, Xiaoxiao); Liu, YQ (Liu, Yanqun); Cheng, HR (Cheng, Hairong)
来源出版物: ATMOSPHERIC ENVIRONMENT 卷: 338 文献号: 120809 DOI: 10.1016/j.atmosenv.2024.120809 Published Date: 2024 DEC 1
摘要: In August 2023, a detailed investigation of formaldehyde (HCHO) chemical characteristics on ozone (O-3) polluted days and non-O-3 polluted days in Wuhan was undertaken. The mean value of HCHO on O-3 polluted days (3.02 +/- 1.15 ppbv) was 122% higher than that on non-O-3 polluted days (1.35 +/- 0.41 ppbv). Utilizing Positive Matrix Factorization (PMF) model revealed secondary formation as the dominant HCHO source (58.3% on non-O-3 polluted days and 66.2% on O-3 polluted days). On O-3 polluted days, the contribution of liquefied petroleum gas (LPG)/solvent usage and industrial emissions to HCHO were 13.7% and 8.2%, respectively, whereas on non-O-3 polluted days, LPG/solvent use and diesel exhaust contributed 15.4% and 14.7%, respectively. The top ten species, with the highest Relative Incremental Reactivity (RIR) to HCHO, were mainly alkenes and aromatics, which remained consistent on both O-3 and non-O-3 polluted days. It is noteworthy that the RIR of isobutane to HCHO is significant in this study. Further reapportionment of secondary HCHO by a photochemical box model indicated that LPG/solvent usage (33.2%) contributed the most to HCHO on O-3 polluted days, while diesel exhaust (31.9%) dominated on non-O-3 polluted days. This research enhances understanding of HCHO in Wuhan, providing a theoretical basis for targeted pollution reduction and supporting efforts to improve air quality and public health.
作者关键词: Wuhan; Formaldehyde; Source apportionment; Pollution characteristics
地址: [Huang, Haibin; Yang, Chunmian; Wang, Zhaoqi; Lian, Shize; Li, Xiaoxiao; Cheng, Hairong] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.
[Liu, Yanqun] Wuhan Univ, Sch Nursing, Ctr Womens & Childrens Hlth Res, Res Ctr Lifespan Hlth, Wuhan 430071, Peoples R China.
通讯作者地址: Cheng, HR (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.
电子邮件地址: chenghr@whu.edu.cn
影响因子：4.2
