Fine particulate pollution driven by nitrate in the moisture urban atmospheric environment in the Pearl River Delta region of south China

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dc.contributor.author

Tao, Jun

Huang, Junjun

Bian, Guojian

Zhang, Leiming

Zhou, Zhen

Zhang, Zhisheng

Li, Jiawei

Miao, Yucong

Yuan, Ziyang

Sha, Qinge

Xiao, Linhai

Wang, Boguang

dc.date.accepted

2022-11-01

dc.date.accessioned

2025-02-21T20:01:55Z

dc.date.available

2025-02-21T20:01:55Z

dc.date.issued

2023-01-15

dc.date.submitted

2022-07-28

dc.description.abstract - en

To identify potential sources of fine particles (PM_2.5, with aerodynamic diameter (D_a) ≤ 2.5 μm) in urban Dongguan of south China, a comprehensive campaign was carried out in the whole 2019. Hourly PM_2.5 and its dominant chemical components including organic carbon (OC), elemental carbon (EC), water-soluble inorganic ions (WSIIs) and thirteen elements were measured using online instruments. Gaseous pollutants including NH₃, HNO₃, NO₂, NO and O₃ and meteorological parameters were also synchronously measured. PM_2.5 was dominated by carbonaceous aerosols in summer and by WSIIs in the other seasons. PM_2.5 and its dominant chemical components mostly peaked around noon (10:00-14:00 LST). Furthermore, high PM_2.5 levels during the daytime were closely related with the increased NO₃^- levels. The high mass concentrations of NO₃^- in urban Dongguan during the daytime were likely related with regional transport of NO₃^- from suburban Dongguan, which was originated from the reaction between NO₂ and O₃ under the moisture condition during the nighttime. Seven major source factors for PM_2.5 including secondary sulfate, ship emission, traffic emission, secondary nitrate, industrial processes, soil dust and coal combustion were identified by positive matrix factorization (PMF) analysis, which contributed 26±14%, 16±16%, 16±10%, 14±11%, 12±11%, 8±6% and 8±6%, respectively, to annual PM_2.5 mass concentration. Although secondary sulfate contributed much more than secondary nitrate to PM_2.5 on annual basis, the latter exceeded the former source factor when daily PM_2.5 mass concentration was higher than 60 μg m^-3, indicating the critical role nitrate played in PM_2.5 episode events.

dc.identifier.issn

1095-8630

0301-4797

dc.identifier.uri

https://open-science.canada.ca/handle/123456789/3458

dc.language.iso

en

dc.publisher - en

Elsevier

dc.relation.isreplacedby

https://doi.org/10.1016/j.jenvman.2022.116704

dc.relation.replaces

https://open-science.canada.ca/handle/123456789/2518

dc.rights - en

Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)

dc.rights - fr

Creative Commons Attribution - Pas d'utilisation commerciale - Pas de modification 4.0 International (CC BY-NC-ND 4.0)

dc.rights.openaccesslevel - en

Green

dc.rights.openaccesslevel - fr

Vert

dc.rights.uri - en

https://creativecommons.org/licenses/by-nc-nd/4.0/

dc.rights.uri - fr

https://creativecommons.org/licenses/by-nc-nd/4.0/deed.fr

dc.subject - en

Ozone

Pollutants

Environmental management

dc.subject - fr

Ozone

Polluant

Gestion de l'environnement

dc.subject.en - en

Ozone

Pollutants

Environmental management

dc.subject.fr - fr

Ozone

Polluant

Gestion de l'environnement

dc.title - en

Fine particulate pollution driven by nitrate in the moisture urban atmospheric environment in the Pearl River Delta region of south China

dc.type - en

Accepted manuscript

dc.type - fr

Manuscrit accepté

local.acceptedmanuscript.articlenum

116704

local.article.journaltitle - en

Journal of Environmental Management

local.article.journalvolume

326

local.pagination

23 pages, annexes

local.peerreview - en

Yes

local.peerreview - fr

Oui

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