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Comparison of pollution characteristics and magnetic response of heavy metals in dustfall before and after COVID-19 outbreak in Shanghai
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Wang, Guan, Xin, Qian, Geng, Xueyu , Zhu, Xinyu, Yao, Wen, Ji, Zhenxiang and Ren, Feifan (2022) Comparison of pollution characteristics and magnetic response of heavy metals in dustfall before and after COVID-19 outbreak in Shanghai. Applied Sciences, 12 (21). 10853. doi:10.3390/app122110853 ISSN 2076-3417.
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Official URL: https://doi.org/10.3390/app122110853
Abstract
In this study, dustfall samples were systematically collected in various regions of Shanghai before and after the occurrence of COVID-19 in December 2019 and December 2020. The magnetic response, content and pollution status of relevant heavy metal elements in the samples were analyzed using environmental magnetism, geochemistry, scanning electron microscopy (SEM) and the enrichment factor (EF) method. The results show that the magnetic particles in the dustfall samples are mainly pseudo-single-domain (PSD) and multi-domain (MD) ferrimagnetic minerals, and Fe, Zn, Cr, and Cu are mainly concentrated in the districts with intensive human activities. Due to restrictions on human activities following the COVID-19 epidemic, both the values of magnetic parameters and the heavy metal pollution level in 2019 are more significant than those in 2020, which is consistent with the Air Quality Index (AQI) results. In addition, magnetic susceptibility (χlf), non-hysteresis remanence (χARM) and saturation isothermal remanence (SIRM) have different degrees of correlation with heavy metal elements, and the correlations with Fe, Pb, Cr and Zn are extremely prominent. The magnetic parameters can effectively and quickly reflect the level of particulate matter pollution, making them a useful tool for monitoring urban air quality.
Item Type: | Journal Article | ||||||
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Subjects: | T Technology > TD Environmental technology. Sanitary engineering | ||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||
Library of Congress Subject Headings (LCSH): | Dust -- China -- Shanghai, Air -- Pollution -- China -- Shanghai, Heavy metals -- Environmental aspects -- China -- Shanghai, Geomagnetism -- China -- Shanghai | ||||||
Journal or Publication Title: | Applied Sciences | ||||||
Publisher: | MDPI | ||||||
ISSN: | 2076-3417 | ||||||
Official Date: | 26 October 2022 | ||||||
Dates: |
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Volume: | 12 | ||||||
Number: | 21 | ||||||
Article Number: | 10853 | ||||||
DOI: | 10.3390/app122110853 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||
Date of first compliant deposit: | 21 December 2022 | ||||||
Date of first compliant Open Access: | 21 December 2022 | ||||||
RIOXX Funder/Project Grant: |
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