Chemical composition characteristics and source analysis of PM2.5 in Jiaxing, China : insights into the effect of COVID-19 outbreak

Jiaxing is a medium-sized city in the Yangtze River Delta (YRD), which showed complex local and surrounding pollution sources. To study the COVID-19 impact on the ambient PM2.5 in Jiaxing, we collected the PM2.5 samples from 2 January to 25 April 2020 and analysed their chemical compositions (includ...

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Détails bibliographiques
Publié dans:Environmental technology. - 1993. - 44(2023), 4 vom: 02. Jan., Seite 552-561
Auteur principal: Xiong, Chuanfang (Auteur)
Autres auteurs: Zhang, Yinglong, Yan, Jing, Yang, Xiaoxia, Wang, Qiongzhen, Tu, Rui, He, Yi
Format: Article en ligne
Langue:English
Publié: 2023
Accès à la collection:Environmental technology
Sujets:Journal Article COVID-19 PM2.5 air quality chemical composition Air Pollutants Particulate Matter Vehicle Emissions Carbon 7440-44-0 plus... Water 059QF0KO0R Ions
Description
Résumé:Jiaxing is a medium-sized city in the Yangtze River Delta (YRD), which showed complex local and surrounding pollution sources. To study the COVID-19 impact on the ambient PM2.5 in Jiaxing, we collected the PM2.5 samples from 2 January to 25 April 2020 and analysed their chemical compositions (including carbon components, water-soluble ions (WSIs), and inorganic elements). The concentration of PM2.5 was 83.13 ± 30.93 μg/m3 before COVID-19 pandemic and then remarkably decreased with COVID-19 outbreak due to the suspension of mobility and industrial activities. Meanwhile, the concentrations of main chemical species (carbon components, water-soluble ions and inorganic elements) of PM2.5 all decreased from period A (2-20 January 2020) to period B (23 January to 10 February 2020). Moreover, Trajectory clustering analysis showed that close-range transport was one of the dominant factors throughout all the periods, except for period D (1-25 April 2020). In addition, the PSCF model indicated that the COVID-19 outbreak resulted in a significant decrease of WPSCF value. This study highlighted the differences in chemical compositions and sources of PM2.5 since COVID-19 pandemic was reported and provided a better understanding of its outbreak on PM2.5
Description:Date Completed 24.01.2023
Date Revised 01.02.2023
published: Print
Citation Status MEDLINE
ISSN:1479-487X
DOI:10.1080/09593330.2021.1979104