| 鹤壁市典型臭氧污染过程表征与解析 |
| 摘要点击 179 全文点击 14 投稿时间：2024-05-31 修订日期：2024-09-10 |
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| 中文关键词 臭氧（O3） PM2.5 排放 来源解析 控制对策 臭氧生成潜势（OFP） |
| 英文关键词 ozone （O3） PM2.5 emissions source analysis control measures ozone formation potential （OFP） |
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| 中文摘要 |
| 近年来中原城市群大气污染问题严重，其中，鹤壁市臭氧（O3）污染尤为突出，长达5个月，且6月污染形势最为严峻. 选取O3持续时间最长（8d）、O3小时浓度平均值高达256 μg·m-3的2023年6月20～27日作为典型O3污染过程进行表征分析. 采用正定矩阵因子分解（PMF）模型、大气污染物源排放清单和臭氧生成潜势（OFP）等多种方法解析臭氧来源；利用Meteoinfo模型潜在源贡献因子法（PSCF）和浓度权重轨迹法（CWT）对O3区域传输进行探讨. 结果表明：①O3与VOCs关联度较大，与芳香烃、烷烃和卤代烃成明显负相关性，NOx次之；②基于对VOCs本地溯源，异戍二烯、间/对-二甲苯、乙烯、1，2，4-三甲苯、己醛和甲苯等活性物种对O3生成贡献最大，本地排放清单和PMF模型结果显示，VOCs主要来源包括溶剂使用源（25.7%）、工艺过程源（23.1%）、移动源（20.4%）、化石燃料固定燃烧源（9.9%）、生物质燃烧源（8.9%）和天然源（12.15%）；③此外，化石燃料固定燃烧源和移动源同样对NOx排放贡献较大；④针对此次污染过程，O3污染的人为源受到周围城市新乡市、安阳市和郑州市等不同方向气团影响；天然源主要受到以周口市和滁州市为主的东南气团影响. 综上，鹤壁市O3污染防治应重点削减宝山园区煤化工、姬家山园区精细化工等VOCs排放量大的企业，以及以鹤淇和丰鹤发电有限责任公司为主的电力企业，并排查施工工地机械和农用机械使用标准，同时加强区域联防联控至关重要. |
| 英文摘要 |
| In recent years， the central plains urban agglomeration has been facing air pollution problems， of which the ozone （O3） pollution in Hebi City has been particularly prominent， for up to five months， with the most serious pollution situation occurring in June. In this study， the period from June 20-27， 2023， which had the longest O3 duration （8d） and high O3 hourly average concentration of 256 μg·m-3， was selected as a typical O3 pollution process for characterization and analysis. Various methods， such as the positive definite matrix factor decomposition （PMF） model， air pollutant source emission inventory， and ozone formation potential （OFP）， were used to resolve ozone sources. The Meteoinfo model potential source contribution factor method （PSCF） and concentration weighting trajectory （CWT） method were used to explore the regional transport of O3. The results showed that： ① O3 was more strongly correlated with VOCs and became significantly negatively correlated with aromatic， alkane， and halogenated hydrocarbons， followed by NOx. ② Based on the local traceability of VOCs， the reactive species such as isoprene， m/p-xylene， ethylene， 1，2，4-trimethylbenzene， hexanal， and toluene contributed the most to the O3 generation， and the results of the local emission inventories and PMF modelling showed that the main sources of VOCs included solvent use sources （25.7%）， process sources （23.1%）， mobile sources （20.4%）， fossil fuel stationary combustion sources （9.9%）， biomass combustion sources （8.9%）， and natural sources （12.15%）. ③ In addition， fossil fuel stationary combustion sources and mobile sources also contributed the most to NOx emissions. ④ In response to the pollution process， man-made sources of O3 pollution were influenced by air masses from different directions in the surrounding cities of Xinxiang， Anyang， and Zhengzhou. Natural sources were mainly influenced by a southeastern air mass dominated by Zhoukou and Chuzhou. In summary， O3 pollution prevention and control should focus on cutting down the enterprises with high VOCs emissions such as the coal chemical industry in Baoshan Park and the fine chemical industry in Jijishan Park in Hebi， as well as electric power enterprises mainly based on Heqi and Fenghe Power Generation Limited Liability Company， and timely checking the standards for the use of machinery at construction sites and agricultural machinery， while it is crucial to strengthen the regional joint prevention and control. |
