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Isotopic signatures and source apportionment of Pb in ambient PM2.5

Authors :
Chien-Cheng Jung
Charles C.-K. Chou
Yi-Tang Huang
Shih-Yu Chang
Chung-Te Lee
Chuan-Yao Lin
Hing-Cho Cheung
Wei-Chen Kuo
Chih-Wei Chang
Shuenn-Chin Chang
Source :
Scientific Reports, Vol 12, Iss 1, Pp 1-11 (2022)
Publication Year :
2022
Publisher :
Nature Portfolio, 2022.

Abstract

Abstract Particulate lead (Pb) is a primary air pollutant that affects society because of its health impacts. This study investigates the source sectors of Pb associated with ambient fine particulate matter (PM2.5) over central-western Taiwan (CWT) with new constraints on the Pb-isotopic composition. We demonstrate that the contribution of coal-fired facilities is overwhelming, which is estimated to reach 35 ± 16% in the summertime and is enhanced to 57 ± 24% during the winter monsoon seasons. Moreover, fossil-fuel vehicles remain a major source of atmospheric Pb, which accounts for 12 ± 5%, despite the current absence of a leaded gasoline supply. Significant seasonal and geographical variations in the Pb-isotopic composition are revealed, which suggest that the impact of East Asian (EA) pollution outflows is important in north CWT and drastically declines toward the south. We estimate the average contribution of EA outflows as accounting for 35 ± 15% (3.6 ± 1.5 ng/m3) of the atmospheric Pb loading in CWT during the winter monsoon seasons.

Subjects

Subjects :
Medicine
Science

Details

Language :
English
ISSN :
20452322
Volume :
12
Issue :
1
Database :
Directory of Open Access Journals
Journal :
Scientific Reports
Publication Type :
Academic Journal
Accession number :
edsdoj.427d61f5545d4c0199bd1b6d6e309d79
Document Type :
article
Full Text :
https://doi.org/10.1038/s41598-022-08096-1