摘要
为探究开封市冬季大气挥发性有机物(VOCs)的污染特征及来源,基于2021年12月至2022年1月开封市生态环境局(城区)在线监测站获取的大气VOCs组分数据,阐述其VOCs污染特征和二次有机气溶胶生成潜势(SOAP),利用PMF模型解析出VOCs的来源.结果表明,冬季开封市ρ(VOCs)平均值为(104.71±48.56)μg·m^(-3),其质量分数最高为烷烃(37.7%),其次为卤代烃(23.5%)、芳香烃(16.8%)、 OVOCs(12.6%)、烯烃(6.9%)和炔烃(2.6%).VOCs对SOA的贡献平均值为3.18μg·m^(-3),其中芳香烃贡献率高达83.8%,其次为烷烃(11.5%);开封市冬季VOCs的最大人为排放来源为溶剂使用(17.9%),其次为燃料燃烧(15.9%)、工业卤代烃排放(15.8%)、机动车排放(14.7%)、有机化学工业(14.5%)和LPG排放(13.3%);溶剂使用源对SOAP的贡献率达到32.2%,其次是机动车排放(22.8%)和工业卤代烃排放(18.9%).可见,降低溶剂使用、机动车排放和工业卤代烃排放的VOCs排放量是控制开封市冬季二次有机气溶胶生成的重要途径.
In order to explore the pollution characteristics and sources of atmospheric volatile organic compounds(VOCs)in winter in Kaifeng City,based on the atmospheric VOCs component data obtained from the online monitoring station of the Kaifeng Ecological and Environmental Bureau(Urban Area)from December 2021 to January 2022,the pollution characteristics of VOCs and secondary organic aerosol formation potential(SOAP)were discussed,and the sources of VOCs were analyzed by using the PMF model.The results showed that the average mass concentration of VOCs in winter in Kaifeng City was(104.71±48.56)μg·m^(-3),and alkanes(37.7%)had the highest proportion of mass concentrations,followed by that of halohydrocarbons(23.5%),aromatics(16.8%),OVOCs(12.6%),alkenes(6.9%),and alkynes(2.6%).The averaged total SOAP contributed by VOCs was 3.18μg·m^(-3),of which aromatics contributed as much as 83.8%,followed by alkanes(11.5%).The largest anthropogenic source of VOCs in winter in Kaifeng City was solvent utilization(17.9%),followed by fuel combustion(15.9%),industrial halohydrocarbon emission(15.8%),motor vehicle emission(14.7%),organic chemical industry(14.5%),and LPG emission(13.3%);solvent utilization contributed 32.2%of the total SOAP,followed by motor vehicle emission(22.8%)and industrial halohydrocarbon emission(18.9%).It was found that reducing VOCs emissions from solvent utilization,motor vehicle emission,and industrial halohydrocarbon emission was important to control the formation of secondary organic aerosols in winter in Kaifeng City.
作者
施雨其
郑凯允
丁玮婷
刘金平
陈洪光
高光
王玲玲
王楠
马双良
郑瑶
谢绍东
SHI Yu-qi;ZHENG Kai-yun;DING Wei-ting;LIU Jin-ping;CHEN Hong-guang;GAO Guang;WANG Ling-ling;WANG Nan;MA Shuang-liang;ZHENG Yao;XIE Shao-dong(College of Environmental Sciences and Engineering,Peking University,Beijing 100871,China;3Clear Technology Co.,Ltd.,Beijing 100029,China;Kaifeng Ecological Environment Monitoring Command and Dispatch Center,Kaifeng 475000,China;Kaifeng Municipal Bureau of Ecology and Environment,Kaifeng 475000,China;Henan Province Ecology Environmental Monitoring Center,Zhengzhou 450000,China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2023年第4期1933-1942,共10页
Environmental Science
基金
大气重污染成因与治理攻关项目(DQGG202129)。
