青岛沿海站点冬季不同污染条件下气溶胶的来源解析——基于单颗粒质谱分析  

Source Analysis of Aerosols at a Coastal Site in Winter in Qingdao Under Different Pollution Conditions by Single Particle Mass Spectrometry

作　　者：吴冠儒 张艳靖 李磊 周振 姚小红[3,4] 周杨 Wu Guanru;Zhang Yanjing;Li Lei;Zhou Zhen;Yao Xiaohong;Zhou Yang(College of Oceanic and Atmospheric Sciences,Ocean University of China,Qingdao 266100,China;Institute of Mass Spectrometer and Atmospheric Environment,Jinan University,Guanzhou 510632,China;Key Laboratory of Marine Environment Science and Ecology,Ocean University of China,Qingdao 266100,China;Laboratory for Marine Ecology and Environmental Science,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266237,China)

机构地区：[1]中国海洋大学海洋与大气学院,山东青岛266100 [2]暨南大学质谱仪器与大气环境研究所,广东广州510632 [3]中国海洋大学海洋环境与生态教育部重点实验室,山东青岛266100 [4]青岛海洋科学与技术试点国家实验室海洋生态与环境科学功能实验室,山东青岛266237

出　　处：《中国海洋大学学报（自然科学版）》2023年第12期127-137,共11页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(41875155,41905106)资助。

摘　　要：青岛位于京津冀的下风区,毗邻黄渤海,其大气污染受到陆地和海洋传输的影响,尤其在冬季来源较为复杂。本研究利用单颗粒气溶胶质谱仪于2019年12月在青岛奥帆中心采集913514个大气颗粒,并利用Art-2a算法将其分类,对青岛市大气气溶胶进行溯源和分析。其中富钾颗粒(K)、元素碳和有机碳混合颗粒物(ECOC)、有机碳颗粒物(OC)、多环芳烃颗粒物(PAH)、OCEC和富钾颗粒与有机碳元素碳混合颗粒(K_ECOC)等颗粒物多与生物质燃烧有关,其在总颗粒物中的占比高达49.2%;与工业排放有关的元素碳和富钾混合颗粒(EC_K)、富铁颗粒(Fe)和其他重金属(other_HM)颗粒物的占比为29.7%;与海洋排放相关的海盐颗粒和富钠颗粒物(Na_rich)占比为6.8%;另外有机胺(Amine,10.6%)受到了陆源和海洋源的共同影响。根据污染个例分析发现,青岛受到京津冀传输影响时,局地工业源EC_K的贡献从36.0%逐渐降至15.0%,较高的环境湿度促进了Amine在颗粒物上的二次生成;当受到高空输送影响时,以生物质燃烧颗粒为主导(70.5%);在海洋气团影响主导时,青岛受局地排放(EC_K,42.2%)和海洋气溶胶(7.7%)控制。Qingdao is located in the downwind area of the polluted Beijing-Tianjin-Hebei(BTH)region and is also a coastal city adjacent to the Yellow Sea and the Bohai Sea.Thus the sources of atmospheric particulate matter in winter Qingdao are widely affected by continental and marine air mass transport.In this study,a single particle aerosol mass spectrometer(SPAMS)was conducted at Qingdao Olympic Fan Center(OSC)in December 2019 to study the source of the air pollution in winter Qingdao.In total,913,514 particles were collected and the mixing states of the particles were analyzed by the Art-2a algorithm.The results show that during the campaign,the particles related to biomass combustion accounted for up to 49.2%of the total particles,including potassium-rich(K)particles,elements carbon and organic carbon hybrid particle(ECOC),organic carbon particles(OC),polycyclic aromatic hydrocarbons(PAH),organic carbon and elemental carbon mixed Particles(OCEC)and potassium particle mixed with ECOC(K_ECOC).Element carbon mixed with potassium(EC_K)particles,Fe and other heavy metals(other-HM)were related to industrial emissions,accounting for 29.7%.Marine sourced particles,including Sea salt Particles and Na_rich particles,accounted for 6.8%.Amine-containing particles contributed 10.4%,were influenced by both continental and marine emissions.We analyzed individual cases in different pollution conditions.In a high pollution case,the site was influenced by the air mass transported from the BTH region.EC_K particles decreased,and Amine may secondary formed on the particle surface during the pollution transport.Under upper air mass transport,the biomass combustion particles dominated in Qingdao,accounting for 70.5%of the total particles.When affected by Marine air mass,Qingdao is controlled by local emissions(EC_K,42.2%)and Marine aerosols(7.7%).

关 键 词：沿海城市 单颗粒 来源解析 污染事件 

分 类 号：X142[环境科学与工程—环境科学]