中文版 | English
Title

Seasonal variation of driving factors of ambient PM2.5 oxidative potential in Shenzhen, China

Author
Corresponding AuthorYang,Xin
Publication Years
2022-11-01
DOI
Source Title
ISSN
0048-9697
EISSN
1879-1026
Volume862
Abstract

Reactive oxygen species (ROS) play a central role in health effects of ambient fine particulate matter (PM). In this work, we screened for efficient and complementary oxidative potential (OP) measurements by comparing the response values of multiple chemical probes (OP, OP, OP) to ambient PM in Shenzhen, China. Combined with meteorological condition and PM chemical composition analysis, we explored the effects of different chemical components and emission sources on the ambient PM OP and analyzed their seasonal variations. The results show that OP(mass-normalized) and OP were highly correlated (r = 0.77). OP was mainly influenced by organic carbon, while OP was highly dominated by heavy metals. The combination of OP and OP provides an efficient and comprehensive measurement of OP. Temporally, the OPs were substantially higher in winter than in summer (1.4 and 4 times higher for OP and OP, respectively). The long-distance transported biomass burning sources from the north dominated the OP in winter, while the ship emissions mainly influenced the summer OP. The OP increased sharply with the decrease of PM mass concentration, especially when the PM concentration was lower than 30 μg/m. The huge differences in wind fields between the winter and summer cause considerable variations in PM concentrations, components, and OP. Our work emphasizes the necessity of long-term, multi-method, multi-component assessment of the OP of PM.

Keywords
URL[Source Record]
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Language
English
SUSTech Authorship
Corresponding
WOS Accession No
WOS:000901732400008
ESI Research Field
ENVIRONMENT/ECOLOGY
Scopus EID
2-s2.0-85143875782
Data Source
Scopus
Citation statistics
Cited Times [WOS]:0
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/442656
DepartmentSchool of Environmental Science and Engineering
工学院_海洋科学与工程系
Affiliation
1.School of Environment,Harbin Institute of Technology,Harbin,150001,China
2.Shenzhen Key Laboratory of Precision Measurement and Early Warning Technology for Urban Environmental Health Risks,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Guangdong Provincial Observation and Research Station for Coastal Atmosphere and Climate of the Greater Bay Area,Shenzhen,Guangdong,518055,China
4.Department of Ocean Sciences and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
5.State Key Laboratory of Organic Geochemistry,Guangdong Key Laboratory of Environmental Protection and Resources Utilization,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou,510640,China
First Author AffilicationSchool of Environmental Science and Engineering
Corresponding Author AffilicationSchool of Environmental Science and Engineering
Recommended Citation
GB/T 7714
Xing,Chunbo,Wang,Yixiang,Yang,Xin,et al. Seasonal variation of driving factors of ambient PM2.5 oxidative potential in Shenzhen, China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2022,862.
APA
Xing,Chunbo.,Wang,Yixiang.,Yang,Xin.,Zeng,Yaling.,Zhai,Jinghao.,...&Zhang,Yanli.(2022).Seasonal variation of driving factors of ambient PM2.5 oxidative potential in Shenzhen, China.SCIENCE OF THE TOTAL ENVIRONMENT,862.
MLA
Xing,Chunbo,et al."Seasonal variation of driving factors of ambient PM2.5 oxidative potential in Shenzhen, China".SCIENCE OF THE TOTAL ENVIRONMENT 862(2022).
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