| Title: | Quantitative evaluation for the sources and aging processes of organic aerosols in urban Guangzhou: Insights from a comprehensive method of dual?ª╡carbon isotopes and macro tracers |
| Author(s): | Jiang F; Liu J; Cheng Z; Ding P; Zhu S; Yuan X; Chen W; Zhang Z; Zong Z; Tian C; Hu W; Zheng J; Szidat S; Li J; Zhang G; |
| Address: | "Institute for Environmental and Climate Research, Jinan University, Guangzhou, China; Department of Chemistry, Biochemistry and Pharmaceutical Sciences and Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland. Institute for Environmental and Climate Research, Jinan University, Guangzhou, China. Electronic address: liu.junwen@jnu.edu.cn. State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China; CAS Center for Excellence in Deep Earth Science, Guangzhou, China. State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China; CAS Center for Excellence in Deep Earth Science, Guangzhou, China. Institute for Environmental and Climate Research, Jinan University, Guangzhou, China. South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou, China. Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China. Department of Chemistry, Biochemistry and Pharmaceutical Sciences and Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland" |
| DOI: | 10.1016/j.scitotenv.2023.164182 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
| Abstract: | "Organic carbon aerosol (OC) is a pivotal component of PM(2.5) in the atmospheric environment, yet its emission sources and atmospheric behaviors remain poorly constrained in many regions. In this study, a comprehensive method based on the combination of dual?ª╡carbon isotopes ((13)C and (14)C) and macro tracers was employed in the PRDAIO campaign performed in the megacity of Guangzhou, China. The (14)C analysis showed that 60 +/- 9 % of OC during the sampling campaign was associated with non-fossil sources such as biomass burning activities and biogenic emissions. It should be noted that this non-fossil contribution in OC would significantly decrease when the air masses came from the eastern cities. Overall, we found that non-fossil secondary OC (SOC(NF)) was the largest contributor (39 +/- 10 %) to OC, followed by fossil secondary OC (SOC(FF): 26 +/- 5 %), fossil primary OC (POC(FF): 14 +/- 6 %), biomass burning OC (OC(bb): 13 +/- 6 %) and cooking OC (OC(ck): 8 +/- 5 %). Also, we established the dynamic variation of (13)C as a function of aged OC and the volatile organic compounds (VOCs) oxidized OC to explore the impact of aging processes on OC. Our pilot results showed that atmospheric aging was highly sensitive to the emission sources of seed OC particles, with a higher aging degree (86 +/- 4 %) when more non-fossil OC particles were transferred from the northern PRD" |
| Keywords: | Aging processes Dual carbon isotopes Organic carbon Source apportionment; |
| Notes: | "PubMed-not-MEDLINEJiang, Fan Liu, Junwen Cheng, Zhineng Ding, Ping Zhu, Sanyuan Yuan, Xin Chen, Wei Zhang, Zhisheng Zong, Zheng Tian, Chongguo Hu, Weiwei Zheng, Junyu Szidat, Sonke Li, Jun Zhang, Gan eng Netherlands 2023/05/18 Sci Total Environ. 2023 Aug 25; 888:164182. doi: 10.1016/j.scitotenv.2023.164182. Epub 2023 May 16" |
