湖北咸宁细颗粒物PM_(2.5)来源  

Source Apportionment of Fine Particles in Xianning,Hubei

作　　者：罗怡 朱宽广 陈璞珑 田军[4] 谢旻[1] 战杨志豪 赵润琪 LUO Yi;ZHU Kuan-guang;CHEN Pu-long;TIAN Jun;XIE Min;ZHAN Yang-zhi-hao;ZHAO Run-qi(School of Atmospheric Sciences,Nanjing University,Nanjing 210023,China;Hubei Academy of Environmental Sciences,Wuhan 430072,China;Net Zero Era(Jiangsu)Environmental Technology Co.,Ltd.,Nanjing 210023,China;Academy of Environmental Planning and Design,Nanjing University,Nanjing 210093,China)

机构地区：[1]南京大学大气科学学院,南京210023 [2]湖北省环境科学研究院,武汉430072 [3]净零纪元(江苏)环境科技有限公司,南京210023 [4]南京大学环境规划设计研究院集团,南京210093

出　　处：《环境科学》2024年第4期1983-1993,共11页Environmental Science

基　　金：国家自然科学基金项目(42275102);江苏省自然科学基金项目(BK20211158);重庆市气象局开放式研究基金项目(KFJJ-201607)。

摘　　要：为了解咸宁细颗粒物(PM_(2.5))来源,对2019年在湖北咸宁两个环境受体点位采集的不同季节大气中PM_(2.5)样品中的主要成分和化学元素进行统计研究;通过颗粒物排放源采样建立本地特征源谱,用化学质量平衡(CMB)受体模型解析其来源;通过VOCs离线监测数据分析其中二次气溶胶(SOA)生成关键组分,并对关键组分进行来源解析.结果表明,咸宁市PM_(2.5)超标情况主要出现在冬季,PM_(2.5)中主要化学成分以水溶性无机盐和含碳组分为主;一次解析揭示硝酸盐、硫酸盐和铵盐等的二次转化对PM_(2.5)浓度的贡献最大,总贡献率在45%以上;二次解析揭示工业源、机动车源及电厂对PM_(2.5)浓度的贡献最大;VOCs对二次有机气溶胶贡献最高的组分为芳香烃,关键组分为苯、甲苯、间/对-二甲苯和乙基苯,对关键组分来源分析发现主要来源为溶剂使用.控制工业排放、机动车排放及调整能源结构是目前控制咸宁PM_(2.5)的主要途径,同时也要考虑控制溶剂排放的芳香烃.To understand the sources of fine particulate matter PM_(2.5) in Xianning,a statistical study was conducted on the major components and chemical elements in atmospheric PM_(2.5) samples collected at two environmental receptor sites in Xianning,Hubei in 2019 in different seasons.Local characteristic source spectra were established through particulate matter emission source sampling,and their sources were resolved using a chemical mass balance(CMB)receptor model.Additionally,the key components of secondary aerosol(SOA)generation were analyzed using offline monitoring of VOCs,and the key components were analyzed using source analysis.The results showed that PM_(2.5) exceedances in Xianning mainly occurred in winter,and the main chemical components in PM_(2.5) were mainly water-soluble inorganic salts and carbon-containing components.Primary analysis revealed that secondary transformations of nitrate,sulphate,and ammonium salts made the largest contribution to PM_(2.5) concentrations,with a total contribution of over 45%;secondary analysis revealed that industrial sources,motor vehicle sources,and power plants made the largest contribution to PM_(2.5) concentrations.The components of VOCs that made the highest contribution to secondary organic aerosols were aromatic hydrocarbons,with the key components being benzene,toluene,m-xylene,paraxylene,and ethylbenzene.Analysis of the sources of the key components revealed that the main source was solvent use.Controlling industrial emissions and motor vehicle emissions and adjusting the energy structure are currently the primary ways to control PM_(2.5) in Xianning,although controlling aromatic hydrocarbons from solvent emissions should also be considered.

关 键 词：咸宁市 PM_(2.5) 化学质量模型(CMB) 来源解析 挥发性有机物(VOCs) 

分 类 号：X513[环境科学与工程—环境工程]