| 2021年夏季新乡市城区臭氧超标日污染特征及敏感性 |
| 摘要点击 2875 全文点击 2286 投稿时间：2022-05-19 修订日期：2022-08-05 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 臭氧(O3) 敏感性 相对增量反应性(RIR) 经验动力学方法(EKMA) 减排方案 |
| 英文关键词 ozone(O3) ozone sensitivity relative incremental reactivity (RIR) empirical kinetic modeling approach (EKMA) emission reduction strategy |
| 作者 | 单位 | E-mail | | 侯墨 | 华南理工大学环境与能源学院, 广州 510006 | 463512054@qq.com | | 蒋小梅 | 华南理工大学环境与能源学院, 广州 510006 | | | 赵文鹏 | 河南省新乡生态环境监测中心, 新乡 453000 | | | 马琳 | 河南省新乡生态环境监测中心, 新乡 453000 | 2870177490@qq.com | | 黄皓旻 | 华南理工大学环境与能源学院, 广州 510006
挥发性有机物污染治理技术与装备国家工程实验室, 广州 510006
广东省大气环境与污染控制重点实验室, 广州 510006
广东省环境风险防控与应急处置工程技术研究中心, 广州 510006 | | | 范丽雅 | 华南理工大学环境与能源学院, 广州 510006
挥发性有机物污染治理技术与装备国家工程实验室, 广州 510006
广东省大气环境与污染控制重点实验室, 广州 510006
广东省环境风险防控与应急处置工程技术研究中心, 广州 510006 | fanly@scut.edu.cn | | 叶代启 | 华南理工大学环境与能源学院, 广州 510006
挥发性有机物污染治理技术与装备国家工程实验室, 广州 510006
广东省大气环境与污染控制重点实验室, 广州 510006
广东省环境风险防控与应急处置工程技术研究中心, 广州 510006 | |
|
| 中文摘要 |
| 基于2021年6~8月新乡市市委党校站点观测的挥发性有机物（VOCs）、常规空气污染物和气象参数，采用基于观测的模型（OBM）对臭氧（O3）超标日的O3敏感性和前体物的管控策略进行了研究.结果发现，O3超标日呈现高温、低湿和低压的气象特征.在臭氧超标日，O3及其前体物的浓度均有上升.臭氧超标日的VOCs最高浓度组分为含氧挥发性有机物（OVOCs）和烷烃，臭氧生成潜势（OFP）和·OH反应性最大的VOCs组分为OVOCs.通过相对增量反应性（RIR）分析，新乡6月O3超标日臭氧生成处于VOCs控制区，7月和8月处于VOCs和氮氧化物（NOx）协同控制区，臭氧生成对烯烃和OVOCs最为敏感.6月各前体物的RIR值在一天中会发生变化，但始终保持为VOCs控制区；7月和8月在上午为VOCs控制区，中午为协同控制区，下午分别为协同控制区和NOx控制区.通过模拟不同前体物削减情景，结果表明削减VOCs始终有利于管控臭氧，而削减NOx对管控O3作用不大，还有导致O3升高的风险. |
| 英文摘要 |
| This study was based on the observation of volatile organic compounds (VOCs), conventional gaseous air pollutants, and meteorological parameters observed at the Xinxiang Municipal Party School site from June to August 2021. The ozone (O3) characteristics and sensitivity of O3 pollution days and the control strategy of its precursors were studied using an observation-based model (OBM). It was found that the meteorological conditions were characterized by high temperature, low humidity, and low pressure in O3-pollution days. The concentrations of O3 and its precursors all increased in the O3 pollution days. Oxygenated volatile organic compounds (OVOCs) and alkanes were the highest-concentration components of VOCs on O3 pollution days in Xinxiang, and OVOCs had the highest ozone formation potential (OFP) and hydroxyl (·OH) reactivity. According to the relative incremental reactivity (RIR) analysis, during the O3 pollution days in Xinxiang, O3sensitivity was in the VOCs-limited regime in June and in the transitional regime in July and August. Ozone production was more sensitive to alkenes and OVOCs. The RIR values of the precursors in June changed throughout the day, but O3 sensitivity remained the VOCs-limited regime. In July and August, O3 sensitivity was the VOCs-limited regime in the morning, transitional regime at noon, transitional and NOx-limited regime, respectively in the afternoon. By simulating different precursor-reduction scenarios, the results showed that the reduction of VOCs was always beneficial to the control of O3, whereas the reduction of NOx had little effect on the control of O3 and a risk of increasing O3. |
|
|
|
