Variations of aminiums in fine particles at a suburban site in Guangzhou, China: Importance of anthropogenic and natural emissions--颗粒学报PARTICUOLOGY

Shu, Q., Pei, C., Lin, X., Hong, D., Lai, S., & Zhang, Y. (2023). Variations of aminiums in fine particles at a suburban site in Guangzhou, China: Importance of anthropogenic and natural emissions. Particuology, 80, 140-147. https://doi.org/10.1016/j.partic.2022.11.019

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

Qiuzi Shu ^a, Chenglei Pei ^b, Xiaoluan Lin ^a, Dachi Hong ^b, Senchao Lai ^a *, Yingyi Zhang

a 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
b Guangzhou Sub-branch of Guangdong Ecological and Environmental Monitoring Center, Guangzhou, 510006, China

10.1016/j.partic.2022.11.019

Volume 80, September 2023, Pages 140-147

Received 20 October 2022, Revised 25 November 2022, Accepted 28 November 2022, Available online 8 December 2022, Version of Record 1 March 2023.

E-mail: sclai@scut.edu.cn

Highlights

• Concentration of aminiums increased with the rises of temperature and relative humidity.

• Aminiums were mainly contributed by anthropogenic sources in the pollution episodes.

• Biological sources had important contribution to aminiums during the non-episode periods especially in spring.

Abstract

Amines are important nitrogen-containing compounds in fine particles (PM_2.5) 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 C₁–C₄ 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.

Graphical abstract

Keywords

AmineIon chromatography; Pollution episode; Anthropogenic sources; Biological emission; Positive matrix factorization

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