摘要
为探究聊城市O_(3)污染特征及驱动机制,基于2021−2023年监测数据及2024年春季一次典型污染过程(4月25−27日),系统分析了聊城市O_(3)污染特征,利用相关性分析法、O_(3)生成潜势(OFP)、潜在源贡献分析,综合评估了气象、前体物驱动影响及潜在贡献源区。结果表明:①2021−2023年聊城市O_(3)浓度逐年攀升,污染高值区由主城区扩展至周边区县。首次出现O_(3)污染的时间由2021年的5月提前至2023年的3月。②聊城市2024年4月25−27日污染物排放强度增加,大气中O_(3)前体物浓度较高,叠加聊城市南部及西南部城市的污染传输,是导致O_(3)污染发生的重要原因。③2024年4月25−27日O_(3)污染过程中,在小时温度超过26℃、相对湿度低于55%、风速高于5 m/s、风向为偏南风的气象条件下,O_(3)超标风险较大。④O_(3)污染期间,OVOCs、烷烃、卤代烃浓度贡献率均较高,分别为66.28%、13.08%、12.78%,O_(3)生成潜势由大到小依次为OVOCs(77.19%)、烯烃(10.78%)、芳香烃(6.92%)。研究显示,气温和污染物排放水平的升高导致2021−2023年聊城市O_(3)污染逐年加剧,2024年4月25−27日的O_(3)污染过程受气象、前体物、传输三元耦合机制共同驱动。因此,建议在夏季来临前部署开展防控工作,加强对涉OVOCs排放源的治理减排,并重视与周边地区的联防联控。
To investigate the characteristics and driving mechanisms of O_(3) pollution in Liaocheng City,this study systematically analyzed O_(3) pollution features based on monitoring data from 2021 to 2023 and a typical pollution episode during April 25th-27th,2024.Correlation analysis,ozone formation potential(OFP),and potential source contribution(PSCF)were used to evaluate the impacts of meteorological conditions,precursor emissions,and regional transport.The key findings are as follows:(1)O_(3) concentrations in Liaocheng City increased year by year from 2021 to 2023,with high-pollution zones expanding from the urban core to surrounding counties.The first annual occurrence of O_(3) pollution advanced from May in 2021 to March in 2023.(2)Elevated pollutant emissions,high atmospheric concentrations of O_(3) precursors,and combined transboundary transport from southern and southwestern neighboring cities were critical contributors to the O_(3) pollution episode during April 25th-27th,2024.(3)During this episode,the risk of O_(3) exceedance increased significantly under meteorological conditions of hourly temperature>26°C,relative humidity<55%,wind speeds>5 m/s,and southerly winds.(4)During the O_(3) pollution period,OVOCs,alkanes,and halogenated hydrocarbons accounted for 66.28%,13.08%and 12.78%of total VOCs,respectively.The OFP was the highest for OVOCs(77.19%),followed by alkenes(10.78%)and aromatic hydrocarbons(6.92%).Studies have shown that rising temperatures and increasing emissions synergistically intensified O_(3) pollution from 2021 to 2023.The 2024 pollution episode was driven by a ternary coupling mechanism involving meteorology,precursors,and regional transport.It is recommended that Liaocheng implement preemptive control strategies before summer,prioritize emission reduction targeting OVOCs-related sources,and strengthen regional joint prevention and control with neighboring areas.
作者
高颖
吴辉
王晓娉
王蕾
张淼
王继红
吕帆
胡华
陈娜
王吉爱
刘辉
GAO Ying;WU Hui;WANG Xiaoping;WANG Lei;ZHANG Miao;WANG Jihong;LÜFan;HU Hua;CHEN Na;WANG Ji′ai;LIU Hui(Tsing-Huan Smart Source Technology Co.,Ltd.,Beijing 100084,China;Tianqiao Branch of Jinan Ecological Environment Bureau,Jinan 250031,China;Liaocheng Environmental Information and Monitoring Center,Liaocheng 252000,China;Shandong Provincial Eco-Environment Monitoring Center,Jinan 250101,China;Shandong Provincial Vehicle Emission Administration Center,Jinan 250102,China)
出处
《环境科学研究》
北大核心
2025年第10期2196-2206,共11页
Research of Environmental Sciences
基金
山东省自然科学基金重大基础研究项目(No.ZR2020ZD21)。
关键词
聊城市
臭氧(O_3)
污染特征
春季
污染过程
潜在源贡献
Liaocheng City
ozone(O_(3))
pollution characteristics
spring
pollution process
potential source contribution
作者简介
高颖(1992-),女,山东聊城人,工程师,硕士,主要从事大气污染防控研究,17862925188@163.com;刘辉(1985-),男,山东济南人,高级工程师,硕士,主要从事大气污染防控研究,liuhui_jeff@163.com。
