摘要
于2020年8月1—31日在上海金山区省界工业区附近设置观测点,对空气中104种挥发性有机物(VOCs)、氮氧化物(NO_(x))和臭氧(O_(3))水平进行观测。观测期间,O_(3)小时质量浓度为17~262μg/m^(3),平均值为83μg/m^(3),期间出现两次O_(3)污染时段,O_(3)时均值分别为119、110μg/m^(3);观测期间总VOCs(TVOCs)体积分数为66.67×10^(-9),VOCs呈白天低、夜间高的变化趋势,各VOCs组分的日变化趋势与TVOCs一致;VOCs的总臭氧生成潜势(OFP)为578.85μg/m^(3),烯烃对OFP的贡献最大;源解析结果表明,两个污染时期的VOCs均与机动车尾气排放及涂料溶剂使用有关,应加强两个VOCs来源的管控;后向轨迹聚类分析表明,两污染时期VOCs高值气团均来自于海上,除周边城市的区域输送外,海上排放源也需加强关注。
An observation site was set up near the provincial boundary industrial area in Jinshan District,Shanghai,to observe the concentration of 104 volatile organic compounds(VOCs),nitrogen oxides(NO_x),and ozone(O_3)in the air from August 1-31,2020.During the observation period,the hourly mass concentration of O_(3)ranged from 17 to 262μg/m^(3),with a mean value of 83μg/m^(3).Two O_(3)pollution episodes occurred during the period,with O_(3)hourly mean values of 119,110μg/m^(3),respectively.The volume fraction of total VOCs(TVOCs)during the observation period was 66.67×10~(-9),VOCs showed a trend of low during the daytime and high at night,and the diurnal variation of VOCs component was consistent with that of TVOCs.The total ozone generating potential(OFP)of the VOCs was 578.85μg/m^(3),and alkenes contributed the most to the OFP.The results of the source analysis showed that the VOCs in both pollution periods were related to vehicle exhaust and paint solvent usage,so the control of the two VOCs sources should be strengthened.The backward trajectory clustering analysis showed that the high-value air masses of VOCs in the two pollution periods came from the sea,and in addition to the regional transport from the neighboring cities,the emission sources from the sea need to be paid more attention.
作者
曹想
李跃武
赵梦飞
易家林
陈喆
黄蓓佳
段玉森
修光利
段炼
CAO Xiang;LI Yuewu;ZHAO Mengfei;YI Jialin;CHEN Zhe;HUANG Beijia;DUAN Yusen;XIU Guangli;DUAN Lian(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093;Shanghai Environmental Monitoring Center,Shanghai 200235;Zhejiang Environmental Technology Co.,Ltd.,Hangzhou Zhejiang 311100;School of Resource and Environmental Engineering,East China University of Science and Technology,State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Processes,Shanghai 200237)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2024年第6期796-802,共7页
Environmental Pollution & Control
基金
国家自然科学基金青年科学基金项目(No.21906055)。
关键词
挥发性有机物
臭氧污染
臭氧生成潜势
源解析
volatile organic compounds
ozone pollution
ozone formation potential
source apportionment
