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Sources and dry deposition of carbonaceous aerosols over the coastal East China Sea: Implications for anthropogenic pollutant pathways and deposition
Fengwen Wang; Ting Feng; Zhigang Guo; Yuanyuan Li; Tian Lin; Neil L. Rose
2019
Source PublicationEnvironmental Pollution
Volume245Pages:771-779
Abstract

75 paired TSP and PM2.5 samples were collected over four seasons on Huaniao Island (HNI), an island that lies downwind of continental pollutants emitted from mainland China to the East China Sea (ECS). These samples were analyzed for organic carbon (OC) and elemental carbon (EC), with a special focus on charEC (char) and soot-EC (soot), to understand their sources, and the scale and extent of pollution and dry deposition over the coastal ECS. The results showed that char concentrations in PM2.5 and TSP averaged from 0.13 to 1.01 and 0.31e1.44 mg m3 ; while for soot, they were from 0.03 to 0.21 and 0.16 e0.56 mg m3 , respectively. 69.0% of the char and 36.4% of the soot were present in PM2.5. The char showed apparent seasonal variations, with highest concentrations in winter and lowest in summer; while soot displayed maximum concentrations in fall and minimum in summer. The char/soot ratios in PM2.5 averaged from 3.29 to 17.22; while for TSP, they were from 1.20 to 7.07. Both of the ratios in PM2.5 and TSP were highest in winter and lowest in fall. Comparisons of seasonal variations in OC/EC and char/ soot ratios confirmed that char/soot may be a more effective indicator of carbonaceous aerosol source identification than OC/EC. Annual average atmospheric dry deposition fluxes of OC and EC into ECS were estimated to be 229 and 107 mg m2 d1 , respectively, and their deposition fluxes significantly increased during episodes. It was estimated that the loadings of OC þ EC and EC accounted for 1.3% and 4.1% of the total organic carbon and EC in ECS surface sediments, respectively, implying a relatively small contribution of OC and EC dry deposition to organic carbon burial. This finding also indicates a possibly more important contribution of wet deposition to organic carbon burial in sediments of ECS, and this factor should be considered for future study.

KeywordOrganic Carbon elemental Carbon char And Soot aerosols sources dry Deposition east China Sea
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/10582
Collection环境地球化学国家重点实验室
Affiliation1.State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400030, China
2.Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3 ), Department of Environmental Science & Engineering, Fudan University, Shanghai, 200438, China
3.Department of Environmental Science, College of Resources and Environmental Science, Chongqing University, Chongqing, 400030, China
4.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, China
5.Environmental Change Research Centre, University College London, Gower Street, London, WC1E 6BT, United Kingdom
Recommended Citation
GB/T 7714
Fengwen Wang,Ting Feng,Zhigang Guo,et al. Sources and dry deposition of carbonaceous aerosols over the coastal East China Sea: Implications for anthropogenic pollutant pathways and deposition[J]. Environmental Pollution,2019,245:771-779.
APA Fengwen Wang,Ting Feng,Zhigang Guo,Yuanyuan Li,Tian Lin,&Neil L. Rose.(2019).Sources and dry deposition of carbonaceous aerosols over the coastal East China Sea: Implications for anthropogenic pollutant pathways and deposition.Environmental Pollution,245,771-779.
MLA Fengwen Wang,et al."Sources and dry deposition of carbonaceous aerosols over the coastal East China Sea: Implications for anthropogenic pollutant pathways and deposition".Environmental Pollution 245(2019):771-779.
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