| 上海市典型区域大气甲醛污染特征及其前体物的来源解析研究 |
| Research on the Pollution Characteristics of Atmospheric Formaldehyde and Source Apportionment of Its Precursors in Typical Areas of Shanghai |
| 投稿时间：2025-02-07 修订日期：2025-04-23 |
| DOI：10.19316/j.issn.1002-6002.2026.01.15 |
| 中文关键词: 甲醛 污染特征 来源解析 上海市 |
| 英文关键词:formaldehyde pollution characterization source apportionment Shanghai |
| 基金项目:国家重点研发计划项目(2022YFC3703501) |
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| 中文摘要: |
| 甲醛(HCHO)既因其毒性对人体健康构成直接威胁,又作为光化学反应的重要参与者,在大气污染及其控制研究中占据重要地位,特别是在工业高度发达的上海市。基于上海市浦东和淀山湖超级站2023—2024年全年HCHO、挥发性有机物(VOCs)组分、臭氧(O3)观测数据,分析了HCHO和O3污染特征,利用多元线性回归方法量化了HCHO的来源,并通过HCHO生成产率识别出HCHO的关键前体物组分。结果表明,2023—2024年,浦东站点HCHO年均浓度分别为2.50×10-9和2.38×10-9,淀山湖站点分别为2.73×10-9和2.78×10-9。其中,浦东站点浓度略有下降,可能与区域污染治理有关。HCHO浓度呈现明显的季节和日变化特征,夏季高、冬季低,日间高、夜间低。HCHO对O3生成的贡献率分别为16.5%(浦东)和14.7%(淀山湖)。多元线性回归分析显示,浦东和淀山湖两站点大气HCHO来源中,二次生成均占主导地位,贡献率分别为63.6%和70.6%。烯烃,特别是乙烯和异戊二烯,是HCHO二次生成的主要前体物。 |
| 英文摘要: |
| Formaldehyde (HCHO) poses a direct threat to human health due to its toxicity and holds significant importance in atmospheric pollution and control studies as a key participant in photochemical reactions,particularly in a highly industrialized city like Shanghai.In this study,the HCHO and O3 pollution characteristics were analyzed based on annual observational data of HCHO,VOCs components,and O3 from 2023 to 2024 at the Pudong and Dianshan Lake super stations in Shanghai,multiple linear regression was employed to quantify the sources of HCHO,and its key precursor components were identified by the generation yield of HCHO.The results showed that the annual mean HCHO concentrations were 2.50×10-9 and 2.38×10-9 at the Pudong site and 2.73×10-9 and 2.78×10-9 at the Dianshan Lake site in 2023 and 2024,respectively,with a slight decrease in Pudong,which may be related to the pollution control measures.The concentrations of HCHO showed seasonal and diurnal variations,being higher in summer and daytime,lower in winter and nighttime.The contributions of HCHO to O3 production were 16.5% (Pudong) and 14.7% (Dianshan Lake),respectively.Multiple linear regression analysis showed that secondary formation dominated the sources of atmospheric formaldehyde at the Pudong and Dianshan Lake sites,accounting for 63.6% and 70.6%,respectively.Alkenes,especially ethylene and isoprene,were identified as the main precursors of HCHO secondary generation. |
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