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Sulfur isotopic fractionation and its implication: Sulfate formation in PM2.5 and coal combustion under different conditions
Chen, Shanli1,2; Guo, Ziyan1,3; Guo, Zhaobing1,3; Guo, Qingjun4; Zhang, Yanlin5; Zhu, Bin2; Zhang, Haixiao1,3
2017-09-15
Source PublicationATMOSPHERIC RESEARCH
ISSN0169-8095
Volume194Pages:142-149
Corresponding AuthorGuo, Zhaobing(guozbnuist@163.com) ; Guo, Qingjun(guoqj@igsnrr.ac.cn)
AbstractIn order to exactly explore sulfur source and sulfate formation under highly polluted atmosphere, we determined delta S-34 values of sulfate in PM2.5 and atmospheric SO2 in Nanjing region from 1 to 23 Jan. 2014. The secondary sulfate formation mechanism was discussed based on sulfur isotopic fractionation in the process of SO2 oxidation. Meanwhile, we synchronously studied delta S-34 values of raw coals used locally as well as sulfur isotopic fractionation during the combustion under coal burning and smoldering. The results show that delta S-34 average values of SO2 and sulfate in PM2.5 were 1.5 parts per thousand and 5.1 parts per thousand, respectively. delta S-34 values of sulfate in PM2.5 were consistent with those of coals widely used in Nanjing region and Northern China, indicating coal combustion was an important sulfur source for PM2.5. Sulfur isotopic fractionation factors ranged from 1.0014 to 1.0075, implying that SO2 heterogeneous and homogeneous oxidation were coexisting during the formation of the secondary sulfate. The contribution of SO2 heterogeneous oxidation to sulfate varied from 40.7% to 64.8% during the observation period. delta S-34 values of coals presented moderately positive sulfur isotopic signatures due to organic sulfur in low sulfur coals were mainly formed by plant assimilation. Besides, the negative relationship between et values of coals and total sulfur contents was also found. In addition, there existed a significant sulfur isotopic fractionation effect during coal combustion. Sulfate in PM2.5 in flue gas enriched S-34, while SO2 in flue gas enriched S-32. There was presence of the difference of delta S-34 values in PM2.5 and SO2 in flue gas between coal burning and smoldering, which was related to coal property and combustion temperature.
KeywordPM2.5 Coal combustion Sulfate formation Sulfur isotopic fractionation
DOI10.1016/j.atmosres.2017.04.034
WOS KeywordCHEMICAL-COMPOSITIONS ; ELEMENTAL CARBON ; TIBETAN PLATEAU ; NANJING REGION ; MINERAL DUST ; CHINA ; AEROSOL ; SO2 ; OXIDATION ; ATMOSPHERE
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41373023] ; National Natural Science Foundation of China[91544229] ; Jiangsu Province 333 Talent Cultivating Project ; Jiangsu Province Environmental Protection research project[2014t016] ; Jiangsu Student Innovation Training Program ; Priority Academic Program Development of Jiangsu Higher Education Institutions
Funding OrganizationNational Natural Science Foundation of China ; Jiangsu Province 333 Talent Cultivating Project ; Jiangsu Province Environmental Protection research project ; Jiangsu Student Innovation Training Program ; Priority Academic Program Development of Jiangsu Higher Education Institutions
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
WOS IDWOS:000405043700012
PublisherELSEVIER SCIENCE INC
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/62857
Collection中国科学院地理科学与资源研究所
Corresponding AuthorGuo, Zhaobing; Guo, Qingjun
Affiliation1.Nanjing Univ Informat Sci & Technol, Sch Environm Sci & Engn, Nanjing 210044, Jiangsu, Peoples R China
2.Nanjing Univ Informat Sci & Technol, Sch Atmospher Phys, Nanjing 210044, Jiangsu, Peoples R China
3.Collaborat Innovat Ctr Atmospher Environm & Equip, Nanjing 210044, Jiangsu, Peoples R China
4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Ctr Environm Remediat, Beijing 100101, Peoples R China
5.Nanjing Univ Informat Sci & Technol, Yale NUIST Ctr Atmospher Environm, Nanjing 210044, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Chen, Shanli,Guo, Ziyan,Guo, Zhaobing,et al. Sulfur isotopic fractionation and its implication: Sulfate formation in PM2.5 and coal combustion under different conditions[J]. ATMOSPHERIC RESEARCH,2017,194:142-149.
APA Chen, Shanli.,Guo, Ziyan.,Guo, Zhaobing.,Guo, Qingjun.,Zhang, Yanlin.,...&Zhang, Haixiao.(2017).Sulfur isotopic fractionation and its implication: Sulfate formation in PM2.5 and coal combustion under different conditions.ATMOSPHERIC RESEARCH,194,142-149.
MLA Chen, Shanli,et al."Sulfur isotopic fractionation and its implication: Sulfate formation in PM2.5 and coal combustion under different conditions".ATMOSPHERIC RESEARCH 194(2017):142-149.
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