引用本文:王筱洁,刘海燕,蒋晓霞,安可珍,李林,王丽敏.威海市秋季VOCs污染特征及来源解析[J].环境监控与预警,2023,15(5):134-140
WANG Xiaojie,LIU Haiyan,JIANG Xiaoxia,AN Kezhen,LI Lin,WANG Limin.Characteristics and Source Analysis of VOCs Pollution in Autumn in Weihai City[J].Environmental Monitoring and Forewarning,2023,15(5):134-140
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威海市秋季VOCs污染特征及来源解析
王筱洁1,刘海燕1,蒋晓霞1,安可珍2,李林2,王丽敏1*
1.山东省威海生态环境监测中心,山东 威海 264200;2.山东省潍坊生态环境监测中心,山东 潍坊261041
摘要:
为探究威海市秋季挥发性有机物(VOCs)污染特征及来源,于2021年9月10—20日采用手工加密监测法对威海市秋季大气中VOCs进行监测,分析了气象因素对臭氧(O3)及其前体物的影响和VOCs污染特征,并利用正交矩阵因子模型(PMF)方法对VOCs来源进行了研究。结果表明,威海市温度对O3生成影响明显,尤其是高温、低湿、扩散较差气象条件下,有利于O3前体物的反应消耗,促使O3生成及累积。观测期间,威海市秋季φ(VOCs)平均值为47.84×10-9,VOCs中体积分数占比最高的为含氧挥发性有机物(OVOCs),占比为58.0%,其次为烷烃(21.6%)、卤代烃(10.2%)。O3生成潜势(OFP)平均值为393.95μg/m3,对OFP的贡献占比最高的为OVOCs(74.1%),其次为芳香烃(12.6%)、烷烃(7.0%)和烯烃(5.4%)。PMF源解析结果显示,机动车尾气排放源、工艺过程源、船舶尾气排放源和溶剂使用源是威海市秋季VOCs排放主要来源,贡献占比分别为30.4%,23.9%,21.1%,16.5%。控制机动车排放和工艺过程排放是控制威海市秋季VOCs污染的重要途径。
关键词:  挥发性有机物  污染特征  来源解析  臭氧生成潜势  秋季
DOI:10.3969/j.issn.1674-6732.2023.05.020
分类号:X511
基金项目:山东省环境科学学会基金项目(202208)
Characteristics and Source Analysis of VOCs Pollution in Autumn in Weihai City
WANG Xiaojie1, LIU Haiyan1, JIANG Xiaoxia1, AN Kezhen2, LI Lin2, WANG Limin1*
1.Weihai Ecological Environment Monitoring Center of Shandong Province, Weihai, Shandong 264200, China; 2.Weifang Ecological Environment Monitoring Center of Shandong Province, Weifang, Shandong 261041, China
Abstract:
In order to explore the characteristics and sources of VOCs pollution in autumn in Weihai City, manual monitoring with high frequency was adopted to monitor VOCs in autumn atmospheric environment of Weihai City from September 10 to 20,2021, and the influence of meteorological factors on ozone (O3) and its precursors and the characteristics of VOCs pollution were analyzed. Orthogonal matrix factor model (PMF) was used to study the sources of VOCs. The results show that the temperature in Weihai City has a significant influence on the generation of O3, especially under the meteorological conditions of high temperature, low humidity and poor diffusion, which is conducive to the reaction consumption of O3 precursors and promotes the generation and accumulation of O3. During the observation period, the mean volume fraction of VOCs in autumn in Weihai City was 47.84×10-9, and the highest concentration of VOCs was OVOCs (58.0%), followed by alkanes (21.6%) and halogenated hydrocarbons (10.2%). OVOCs (74.1%) contributed the most to OFP, followed by aromatic hydrocarbons (12.6%), alkanes (7.0%) and alkenes (5.4%). PMF source analysis showed that motor vehicle exhaust (gasoline and diesel vehicles) emission sources, process source, ship exhaust emission sources and industrial sources were the main sources of VOCs emission in Weihai in autumn, contributing 30.4%, 23.9%, 21.1% and 16.5%. Controlling vehicle exhaust and ship exhaust emissions is an important way to control autumn VOCs pollution in Weihai City.
Key words:  VOCs  Pollution characteristics  Source apportionment  OFP  Autumn