Chemical composition characteristics and source analysis of PM2.5 in Jiaxing, China: Insights into the effect of COVID-19 outbreak.
Environ Technol
; : 1-29, 2021 Sep 09.
Article
in English
| MEDLINE | ID: covidwho-2237137
ABSTRACT
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 January 2 to April 25, 2020 and analyzed 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 (January 2 to 20, 2020) to period B (January 23 to February 10, 2020). Moreover, Trajectory clustering analysis showed that close-range transport was one of the dominant factors throughout all the period, except for period D (April 1 to 25, 2020). In addition, 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 were reported and provide a better understanding of the impact of COVID-19 outbreak on PM2.5.
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Type of study:
Experimental Studies
Language:
English
Journal:
Environ Technol
Journal subject:
Environmental Health
/
Toxicology
Year:
2021
Document Type:
Article
Affiliation country:
09593330.2021.1979104
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