2017~2022年亳州市PM_(2.5)与O_(3)复合污染演变特征及典型污染过程  

Evolution Characteristics and Typical Pollution Episodes of PM_(2.5)and O_(3)Complex Pollution in Bozhou City from 2017 to 2022

作　　者：吴渴 王学中[2] 张丹丹[2,3] 朱华龙 闫永馨 李凡修 毋振海[2] 郑振威 高祺凯 WU Ke;WANG Xue-zhong;ZHANG Dan-dan;ZHU Hua-long;YAN Yong-xin;LI Fan-xiu;WU Zhen-hai;ZHENG Zhen-wei;GAO Qi-kai(College of Chemistry and Environmental Engineering,Yangtze University,Jingzhou 434023,China;State Key Laboratory of Environmental Criteria and Risk Assessment,Chinese Research Academy of Environmental Sciences,Beijing 100012,China;College of Mechanical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China;Bozhou Municipal Ecology and Environment Bureau,Bozhou 236000,China)

机构地区：[1]长江大学化学与环境工程学院,荆州434023 [2]中国环境科学研究院环境基准与风险评估国家重点实验室,北京100012 [3]北京石油化工学院机械工程学院,北京102617 [4]亳州市生态环境局,亳州236000

出　　处：《环境科学》2024年第10期5715-5728,共14页Environmental Science

基　　金：亳州市大气“一市一策”技术支撑项目(BZSJ2022CG111);中央级公益性科研院所基本科研业务费专项(2023YSKY-14)。

摘　　要：我国大气污染呈现复合型污染特征,且细颗粒物(PM_(2.5))和臭氧(O_(3))同时超标情况有所显现.为了解亳州市PM_(2.5)与O_(3)复合污染特征及演变规律,通过天气分型、典型污染过程分析和前体物来源解析等手段,探究了2017~2022年亳州市PM_(2.5)和O_(3)污染及变化情况,进而分析了其污染成因和前体物来源.结果表明:①亳州市PM_(2.5)-O_(3)复合污染多发生在高压控制型天气下,日间高温低湿等气象条件促进O_(3)污染的形成,夜间高湿及大气强氧化性促进PM_(2.5)中硝酸盐、铵盐等二次组分的生成.②污染过程期间,亳州市PM_(2.5)主要来自二次生成、交通污染源、生物质燃烧源、燃煤源和扬尘源;挥发性有机物(VOCs)主要来自生物质燃烧源、交通污染源、油气挥发源、溶剂使用源、化石燃料燃烧源、居民生活排放源和工业排放源;生物质燃烧源和交通污染源在污染过程期间的贡献均较大.③气团轨迹和区域污染形势分析表明,南北气团叠加和本地生成是2022年10月18~27日亳州市PM_(2.5)-O_(3)复合污染的主要原因.In China,atmospheric pollution exhibits a complex pattern,with simultaneous exceedances of fine particulate matter(PM_(2.5))and ozone(O_(3))levels becoming evident.To understand the complex pollution characteristics and evolution patterns of PM_(2.5)and O_(3)in Bozhou City,various methods such as weather classification,analysis of typical pollution processes,and investigation of precursor sources were employed to explore the pollution and variations of PM_(2.5)and O_(3)in Bozhou City from 2017 to 2022 and subsequently analyze their causes and precursor sources.The results indicated that:①PM_(2.5)-O_(3)complex pollution in Bozhou City mostly occurred under high-pressure weather conditions,with daytime high temperatures and low humidity promoting the formation of O_(3)pollution,whereas nighttime high humidity and atmospheric oxidative conditions promoted the generation of secondary components such as nitrates and ammonium salts in PM_(2.5).②During the pollution process,PM_(2.5)in Bozhou City mainly originated from biomass burning,secondary generation,traffic pollution,coal combustion,and dust sources.Volatile organic compounds(VOCs)primarily emerged from plant sources,traffic pollution,oil and gas evaporation,solvent use,fossil fuel combustion,residential emissions,and industrial emissions.Biomass burning and traffic pollution made significant contributions to the pollution process.③Analysis of air mass trajectories and regional pollution situations indicated that the overlay of northern and southern air masses,along with local generation,were the main causes of the PM_(2.5)-O_(3)complex pollution in Bozhou from October 18th to 27th,2022.

关 键 词：臭氧(O_(3)) 细颗粒物(PM_(2.5)) 复合污染 季节性变化 苏皖鲁豫交界区 

分 类 号：X51[环境科学与工程—环境工程]