Spatial characterization of HCHO and reapportionment of its secondary sources considering photochemical loss in Taiyuan, China
文献类型：期刊论文
| 作者 | Hua, Jingya2; Cui, Yang2; Guo, Lili2; Li, Hongyan2 ; Fan, Jie2; Li, Yanan2; Wang, Yonghong3; Liu, Kankan1; He, Qiusheng2; Wang, Xinming4
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| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
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| 出版日期 | 2023-03-20 |
| 卷号 | 865页码:14 |
| 关键词 | Formaldehyde Spatial distribution Photochemical loss Source apportionment |
| ISSN号 | 0048-9697 |
| DOI | 10.1016/j.scitotenv.2022.161069 |
| 英文摘要 | Formaldehyde (HCHO) plays an important role in atmospheric ozone (O3) formation. To accurately identify the sources of HCHO, carbonyls and volatile organic compounds (VOCs) were measured at three urban sites (Taoyuan, TY-U; Jinyuan, JY-U; Xiaodian, XD-U) and a suburban site (Shanglan, SL-B) in Taiyuan during a high O3 period (from July 20 to August 3, 2020). The average mixing ratio of HCHO at XD-U (8.1 +/- 2.8 ppbv) was comparable to those at TY-U (7.4 +/- 2.1 ppbv) and JY-U (7.0 +/- 2.3 ppbv) but higher (p < 0.01) than that at SL-B (4.9 +/- 2.3 ppbv). HCHO contributed to 54.3-59.9 % of the total ozone formation potentials (OFPs) of non-methane hydrocarbons (NMHCs) at four sites. The diurnal variation of HCHO concentrations reached a peak value at 12:00-15:00, which may be attributed to the strong photochemical reaction. To obtain more accurate source results of HCHO under the condition of photochemical loss, the initial concentrations of NMHCs were estimated based on photochemical age parameterization and incorporated into the positive matrix factorization (PMF) model (termed IC-PMF). According to the ICPMF results, secondary formation (SF) contributed the most to HCHO at XD-U (35.6 %) and SL-B (25.1 %), whereas solvent usage (SU) (40.9 %) and coking sources (CS) (36.0 %) were the major sources at TY-U and JY-U, respectively. Compared to the IC-PMF, the conventional PMF analysis based on the observed data underestimated the contributions of SU (100.5-154.2 %) and biogenic sources (BS) (28.5-324.7 %). Further reapportionment of secondary HCHO by multiple linear regression indicated that SU dominated the sources of HCHO at SL-B (28.3 %) and TY-U (41.7 %), while industrial emissions (IE) and CS contributed the most to XD-U (26.6 %) and JY-U (43.0 %) in Taiyuan from north to south, respectively. |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000918639300001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/72436]  |
| 专题 | 有机地球化学国家重点实验室 |
| 通讯作者 | Cui, Yang; Wang, Yonghong |
| 作者单位 | 1.North Univ China, Sch Environm & Safety Engn, Taiyuan 030051, Peoples R China 2.Taiyuan Univ Sci & Technol, Sch Environm & Resources, Taiyuan 030024, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Joint Lab Environm Simulat & Pollut Cont, Beijing 100085, Peoples R China 4.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hua, Jingya,Cui, Yang,Guo, Lili,et al. Spatial characterization of HCHO and reapportionment of its secondary sources considering photochemical loss in Taiyuan, China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2023,865:14. |
| APA | Hua, Jingya.,Cui, Yang.,Guo, Lili.,Li, Hongyan.,Fan, Jie.,...&Wang, Xinming.(2023).Spatial characterization of HCHO and reapportionment of its secondary sources considering photochemical loss in Taiyuan, China.SCIENCE OF THE TOTAL ENVIRONMENT,865,14. |
| MLA | Hua, Jingya,et al."Spatial characterization of HCHO and reapportionment of its secondary sources considering photochemical loss in Taiyuan, China".SCIENCE OF THE TOTAL ENVIRONMENT 865(2023):14. |
入库方式： OAI收割
来源：广州地球化学研究所
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