摘要
为了解杭州市挥发性有机物(VOCs)的污染特征及其对臭氧生成的影响,利用2020年9月至2021年8月的VOCs在线监测数据,全面分析了杭州市VOCs污染特征,并利用正定矩阵因子分析(PMF)和排放清单对VOCs进行来源解析,分析不同组分的臭氧生成能力。结果显示,杭州市VOCs逐月变化呈现“冬高夏低”的特征,烷烃在总VOCs中的占比最高。根据PMF解析,对杭州市VOCs浓度贡献最大的为机动车尾气排放源和溶剂使用排放源。排放清单中,溶剂使用排放源和工业排放源为贡献最大的来源。与排放清单结果相比,PMF结果中机动车尾气排放源和汽油挥发排放源贡献率偏高,与监测点位于城区环境、距离工业园区较远有关,因此VOCs污染防控应针对不同区域精准施策。从各组分对臭氧生成潜势的贡献来看,烯烃和芳香烃是贡献最大的组分。
In order to understand the pollution characteristics of VOCs and their impact on ozone generation in Hangzhou,the VOCs pollution characteristics were comprehensively analyzed by using the online monitoring data of VOCs from September 2020 to August 2021.The source of VOCs was analyzed by PMF and emission inventory,and the ozone generation potential of different components was analyzed.The results showed that the monthly change of VOCs was characterized by“high in winter and low in summer”.Alkanes accounted for the highest proportion of total VOCs.Based on PMF analysis,vehicle exhaust emission source and solvent use source contributed the most to VOCs concentration in Hangzhou,while solvent use source and industrial source accounted for the largest share of emissions in the emission inventory.Compared with the emission inventory results,vehicle exhaust emission source and gasoline volatilization source accounted for a higher proportion in the PMF results,which was related to the fact that the monitoring point was located in the main urban area and far from the industry zone,therefore,the prevention and control of VOCs pollution should be targeted at different regions.In terms of contribution of VOCs components to ozone formation potential,olefin and aromatic hydrocarbons were the components that contributed the most.
作者
张奇漪
唐伟
夏阳
项萍
王冬蕊
王星
刘宁
ZHANG Qiyi;TANG Wei;XIA Yang;XIANG Ping;WANG Dongrui;WANG Xing;LIU Ning(Hangzhou Institute of Ecological Environment Sciences(Hangzhou Urban Ecological Environment Monitoring Station),Hangzhou Zhejiang 310014;Nanjing Intelligent Environmental Sci-Tech Co.,Ltd.,Nanjing Jiangsu 211800)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2024年第4期543-549,共7页
Environmental Pollution & Control
基金
杭州市农业与社会发展一般项目(No.20201203B156、No.20201203B157、No.20201203B158)
浙江省生态环境科研和成果推广项目(No.2021HT0011)。
