Atmospheric Hg(p) concentrations at various particles sizes before (2018–2019) and during (2019–2020 and 2020–2021) COVID-19 occurred periods in Taichung, Taiwan

Fang, Guor‐Cheng; Zhuang, Yuan-Jie

doi:10.1080/10934529.2022.2133915

Journal of Environmental Science and Health, Part A

2022

DOI: 10.1080/10934529.2022.2133915

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Atmospheric Hg(p) concentrations at various particles sizes before (2018–2019) and during (2019–2020 and 2020–2021) COVID-19 occurred periods in Taichung, Taiwan

Guor‐Cheng Fang

Yuan-Jie Zhuang

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2024

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A comprehensive examination of temporal-seasonal variations of PM1.0 and PM2.5 in taiwan before and during the COVID-19 lockdown

Room,

Chiu,

Pan

et al. 2024

Environ Sci Pollut Res

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COVID-19 has been a significant global concern due to its contagious nature. In May 2021, Taiwan experienced a severe outbreak, leading the government to enforce strict Pandemic Alert Level 3 restrictions in order to curtail its spread. Although previous studies in Taiwan have examined the effects of these measures on air quality, further research is required to compare different time periods and assess the health implications of reducing particulate matter during the Level 3 lockdown. Herein, we analyzed the mass concentrations, chemical compositions, seasonal variations, sources, and potential health risks of PM1.0 and PM2.5 in Central Taiwan before and during the Level 3 lockdown. As a result, coal-fired boilers (47%) and traffic emissions (53%) were identified as the predominant sources of polycyclic aromatic hydrocarbons (PAHs) in PM1.0, while in PM2.5, the dominant sources of PAHs were coal-fired boilers (28%), traffic emissions (50%), and iron and steel sinter plants (22.1%). Before the pandemic, a greater value of 20.9 ± 6.92 μg/m3 was observed for PM2.5, which decreased to 15.3 ± 2.51 μg/m3 during the pandemic due to a reduction in industrial and anthropogenic emissions. Additionally, prior to the pandemic, PM1.0 had a contribution rate of 79% to PM2.5, which changed to 89% during the pandemic. Similarly, BaPeq values in PM2.5 exhibited a comparable trend, with PM1.0 contributing 86% and 65% respectively. In both periods, the OC/EC ratios for PM1.0 and PM2.5 were above 2, due to secondary organic compounds. The incremental lifetime cancer risk (ILCR) of PAHs in PM2.5 decreased by 4.03 × 10-5 during the pandemic, with PM1.0 contributing 73% due to reduced anthropogenic activities.

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A comprehensive examination of temporal-seasonal variations of PM1.0 and PM2.5 in taiwan before and during the COVID-19 lockdown

Room,

Chiu,

Pan

et al. 2024

Environ Sci Pollut Res

View full text Add to dashboard Cite

show abstract

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Atmospheric Hg(p) concentrations at various particles sizes before (2018–2019) and during (2019–2020 and 2020–2021) COVID-19 occurred periods in Taichung, Taiwan

Cited by 1 publication

References 35 publications

A comprehensive examination of temporal-seasonal variations of PM1.0 and PM2.5 in taiwan before and during the COVID-19 lockdown

A comprehensive examination of temporal-seasonal variations of PM1.0 and PM2.5 in taiwan before and during the COVID-19 lockdown

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