國家衛生研究院 NHRI:Item 3990099045/14788

NHRI > National Institute of Environmental Health Sciences > Yu-Cheng Chen > Periodical Articles > Item 3990099045/14788

Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/14788

Title:	Source-oriented risk and lung-deposited surface area (LDSA) of ultrafine particles in a Southeast Asia urban area
Authors:	Chen, TL;Lai, CH;Chen, YC;Ho, YH;Chen, AY;Hsiao, TC
Contributors:	National Institute of Environmental Health Sciences
Abstract:	Submicron and ultrafine particle (UFP) exposure may be epidemiologically and toxicologically linked to pulmonary, neurodegenerative, and cardiovascular diseases. This study explores UFP and fine particle sources using a positive matrix factorization (PMF) model based on PM(2.5) chemical compositions and particle number size distributions (PNSDs). The particle chemical composition and size distribution contributions are simultaneously identified to evaluate lung deposition and excess cancer risks. High correlations between the PNSD and chemical composition apportionment results were observed. Fresh and aged traffic particles dominated the number concentrations, while heterogeneous, photochemical reactions and/or regional transport may have resulted in secondary aerosol formation. Fresh and aged road traffic particle sources mostly contributed to the lung deposition dosage in the pulmonary region (~53 %), followed by the tracheobronchial (~30.4 %) and head regions (~16.6 %). However, lung-deposited surface area (LDSA) concentrations were dominated by aged road traffic (~39.2 %) and secondary aerosol (~33.2 %) sources. The excess cancer risks caused by Cr(6+), Ni, and As were also mainly contributed to by aged road traffic (~31.7 %) and secondary aerosols (~67 %). The source apportionments based on the physical and chemical properties of aerosol particles are complementary, offering a health impact benchmark of UFPs in a Southeast Asia urban city.
Date:	2023-04-20
Relation:	Science of the Total Environment. 2023 Apr 20;870:Article number 161733.
Link to:	http://dx.doi.org/10.1016/j.scitotenv.2023.161733
JIF/Ranking 2023:	http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=0048-9697&DestApp=IC2JCR
Cited Times(WOS):	https://www.webofscience.com/wos/woscc/full-record/WOS:000927882400001
Cited Times(Scopus):	https://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85147196827
Appears in Collections:	[Yu-Cheng Chen] Periodical Articles

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