title: [Tracing Sources of Sulfate Aerosol in Nanjing Northern Suburb Using Sulfur and Oxygen Isotopes].
abstract: Abstract: To trace the sources of sulfate contributing to atmospheric aerosol, PM2.5 samples for isotopic analysis were collected in Nanjing northern suburb during January 2014. The sulfur and oxygen isotopic compositions of sulfate from these samples were determined by EA-IRMS. Source identification and apportionment were carried out using stable isotopic and chemical evidences, combined with absolute principal component analysis (APCA) method. The Δ34S values of aerosol sulfate ranged from 2.7 per thousand to 6.4 per thousand, with an average of 5.0 per thousand ± 0.9 per thousand, while the Δ18O values ranged from 10.6 per thousand to 16.1 per thousand, with an average of 12.5 per thousand ± 1.37 per thousand. In conjunction with air mass trajectories, the results suggested that aerosol sulfates were controlled by a dominance of local anthropogenic sulfate, followed by the contributions of long-distance transported sulfate. There was a minor effect of some other low-Δ34S valued sulfates, which might be expected from biogenic sources. Absolute principal component analysis results showed that the contributions of anthropogenic sulfate and long-distance transported sulfate were 46.74% and 31.54%, respectively.
authors.forename: Ying
authors.initials: Y
authors.lastname: Wei
authors.forename: Zhao-bing
authors.initials: ZB
authors.lastname: Guo
authors.forename: Xin
authors.initials: X
authors.lastname: Ge
authors.forename: Sheng-nan
authors.initials: SN
authors.lastname: Zhu
authors.forename: Wen-juan
authors.initials: WJ
authors.lastname: Jiang
authors.forename: Lei
authors.initials: L
authors.lastname: Shi
authors.forename: Shu
authors.initials: S
authors.lastname: Chen
mesh_terms: D000336:Aerosols; D000393:Air Pollutants / Q000032:analysis*; D002681:China; D004784:Environmental Monitoring; D010103:Oxygen Isotopes / Q000032:analysis; D013431:Sulfates / Q000032:analysis*; D013460:Sulfur Isotopes / Q000032:analysis
chemical_list: D000336:Aerosols; D000393:Air Pollutants; D010103:Oxygen Isotopes; D013431:Sulfates; D013460:Sulfur Isotopes