摘要
为了解盐城市城区大气中非甲烷碳氢化合物(NMHCs)的浓度水平和变化形式,使用离线采样系统地对盐城市环境监测中心、盐城电厂、盐塘河公园、亭湖区政府4个采样点位环境空气NMHCs的浓度水平、组分特征、光化学活性及来源进行监测并开展对比研究。研究结果表明:2021年4月~10月盐城市城区NMHCs平均体积分数为8.96×10^(-9),各采样点NMHCs组分比例相似,主要成分为烷烃,所占比例均超过60%,其次为芳香烃和烯烃,炔烃所占比例最小。NMHCs中1,3,5-三甲基苯的光化学反应活性最强。监测期间NMHCs浓度主要贡献来源于机动车尾气排放、生物质燃烧和溶剂挥发。
To understand the concentration level and variation pattern of non-methane total hydrocarbons(NMHCs)in the atmosphere of Yancheng urban area,off-line sampling was used to systematically compare the concentration levels,component characteristics,photochemical activities and sources of NMHCs in the ambient air at four sampling sites:Yancheng environmental monitoring center,Yancheng power plant,Yantanghe park,and Tinghu district government.The research results show thatthe average volume fraction of NMHCs in Yancheng city was 8.96×10^(-9)from april to october of2021.The components of NMHCs at each sampling point are roughly similar,and the main component is alkane,accounting for more than 60%,followed by aromatic hydrocarbons and alkene,with the smallest proportion of alkynes.1,3,5-trimethylbenzene has the strongest photochemical reactivity among NMHCs.The main contributions of NMHCs concentrations during the monitoring period come from vehicle exhaust emissions,biomass combustion and solvent volatilization.
作者
李云飞
孙红梅
沐存芳
李霆
咸月
LI Yun-fei;SUN Hong-mei;MU Cun-fang;LI Ting;XIAN Yue(Jiangsu Yancheng Environmental Monitoring Center,Yancheng 224002,China)
出处
《环境科技》
2022年第5期58-64,共7页
Environmental Science and Technology
基金
江苏省PM2.5与臭氧协同控制重大专项(2019023)。
关键词
盐城
NMHCS
浓度特征
光化学反应活性
来源
Yancheng
NMHCs
Concentration characteristics
Photochemical reactivity
Source
