Variations of aminiums in fine particles at a suburban site in Guangzhou, China: Importance of anthropogenic and natural emissions  

作　　者：Qiuzi Shu Chenglei Pei Xiaoluan Lin Dachi Hong Senchao Lai Yingyi Zhang 

机构地区：[1]The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters,Ministry of Education,School of Environment and Energy,South China University of Technology,Guangzhou,510006,China [2]Guangzhou Sub-branch of Guangdong Ecological and Environmental Monitoring Center,Guangzhou,510006,China

出　　处：《Particuology》2023年第9期140-147,共8页颗粒学报（英文版）

基　　金：The authors thank the financial support of the National Natural Science Foundation of China(grant numbers 41975156,41675119);Fundamental Research Funds for the Central Universities(grant number 2014Zz0054).

摘　　要：Amines are important nitrogen-containing compounds in fine particles(PM2.5)in the atmosphere.Observations are necessary for in-depth understanding on the characteristics,sources and atmospheric processes of aminiums.In this study,the observation of ten C_(1)–C_(4) aminiums in PM_(2.5) was conducted in January and March of 2021 in suburban Guangzhou.The concentration and composition of aminiums showed significant differences between the pollution episodes and non-episode periods.Seasonal difference was also observed between winter and spring.The influence of meteorological factors(i.e.,wind speed,atmospheric pressure,temperature and relative humidity)was investigated.The variations of aminiums were also affected by different sources.Anthropogenic sources were suggested to be major contributor to aminiums in the pollution episodes,while biological sources were important sources to aminiums in the non-episode periods,especially in spring.Positive matrix factorization receptor model was applied to investigate the source contributions,and four major sources were identified.The results show that vehicular emission,industrial production,biological emission and soil/dust were the major sources of aminiums.This study emphasizes the importance of source contribution and meteorological conditions on the variations of aminiums,which provides further understanding of organic nitrogen in the atmosphere.

关 键 词：Amine lon chromatography Pollution episode Anthropogenic sources Biological emission Positive matrix factorization 

分 类 号：X513[环境科学与工程—环境工程]