基于光化学损失的郑州市夏季VOCs污染特征、来源及环境影响  

Characteristics,Sources Analysis,and Environmental Impacts of VOCs Based on Photochemical Loss in Summer in Zhengzhou

作　　者：李卓[1] 王冰[1] 王甜甜[1] 张栋 宋鑫帅 袁明浩 卢轩 王文举 尹沙沙 张瑞芹[1] LI Zhuo;WANG Bing;WANG Tian-tian;ZHANG Dong;SONG Xin-shuai;YUAN Ming-hao;LU Xuan;WANG Wen-ju;YIN Sha-sha;ZHANG Rui-qin(School of Ecology and Environment,Zhengzhou University,Zhengzhou 450001,China;College of Chemistry,Zhengzhou University,Zhengzhou 450001,China;Environmental Protection Monitoring Center Station of Zhengzhou,Zhengzhou 450007,China)

机构地区：[1]郑州大学生态与环境学院,郑州450001 [2]郑州大学化学学院,郑州450001 [3]郑州市环境保护监测中心站,郑州450007

出　　处：《环境科学》2024年第9期5157-5167,共11页Environmental Science

基　　金：郑州市PM_(2.5)与O3协同控制监测项目(20220347A)。

摘　　要：为明确郑州市夏季大气挥发性有机物(VOCs)污染特征和来源,于2022年8月对郑州市大气VOCs开展多点位离线采样及实验室分析,对比该时期观测和初始VOCs的体积分数水平、臭氧生成潜势(OFP)、二次气溶胶生成潜势(SOAFP)和来源.研究期间三点位观测与初始φ(VOCs)平均值分别为(31.83±13.51)×10^(−9)和(35.92±15.30)×10^(−9),烯烃(52.5%)和芳香烃(29.7%)是光化学损耗率较高的组分,各点位TVOCs观测浓度空间变化大小为:郑州大学>岗李水库>经开区管委,烷烃和OVOCs在各点位的贡献均较高;烯烃和芳香烃是对臭氧和二次气溶胶形成贡献较大的组分;机动车源、溶剂使用源和工业源是郑州市大气VOCs的主要贡献源,与基于初始浓度的源解析结果相比,机动车源、工业源和溶剂使用源贡献率相对较高,燃烧源、植物源和油气挥发源的贡献率相对较低.To clarify the pollution characteristics and sources of atmospheric VOCs in Zhengzhou City in the summer,multi-site offline sampling and laboratory analyses of atmospheric VOCs in Zhengzhou were carried out in August 2022.The observed and initial VOC volume fraction levels,OFP,SOAFP,and sources were compared.During the study period,the average values of three-site observation and initialφ(VOCs)during the study period were(31.83±13.51)×10^(−9) and(35.92±15.30)×10^(−9),respectively.Olefins(52.5%)and aromatic hydrocarbons(29.7%)were the components with a higher photochemical loss rate,and the spatial variations of the observed TVOCs concentration at each site were:Zhengzhou University(ZZU)>Gangli Reservoir(GLR)>Jingkaiqu(JKQ),and the concentrations of alkanes and OVOCs at each site were higher.Olefins and aromatic hydrocarbons were the components that contributed greatly to the formation of O_(3) and SOA.Motor vehicle sources,solvent-use sources,and industrial sources were the main contributing sources of atmospheric VOCs in Zhengzhou.Compared with the source analysis results based on the initial concentration,the contribution rates of motor vehicle sources,industrial sources,and solvent use sources were relatively high,and the contribution rates of combustion sources,plant sources,and oil and gas volatilization sources were relatively low.

关 键 词：挥发性有机化合物(VOCs) 来源解析 臭氧生成潜势(OFP) 二次有机气溶胶生成潜势(SOAFP) 光化学损失 

分 类 号：X511[环境科学与工程—环境工程]