期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 888, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2023.164182
关键词
Organic carbon; Dual carbon isotopes; Source apportionment; Aging processes
This study used a combination of dual-carbon isotopes and macro tracers in the PRDAIO campaign in Guangzhou, China to investigate the sources and behaviors of organic carbon aerosol (OC) in the atmospheric environment. The results showed that non-fossil sources such as biomass burning activities and biogenic emissions accounted for a significant portion of OC. The study also found that non-fossil secondary OC was the largest contributor to OC, followed by fossil secondary OC, fossil primary OC, biomass burning OC, and cooking OC. Additionally, the study explored the impact of aging processes on OC and found that atmospheric aging was highly sensitive to the emission sources of seed OC particles.
Organic carbon aerosol (OC) is a pivotal component of PM2.5 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-carbon isotopes (13C and 14C) and macro tracers was employed in the PRDAIO campaign performed in the megacity of Guangzhou, China. The 14C analysis showed that 60 & PLUSMN; 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 east-ern cities. Overall, we found that non-fossil secondary OC (SOCNF) was the largest contributor (39 & PLUSMN; 10 %) to OC, followed by fossil secondary OC (SOCFF: 26 & PLUSMN; 5 %), fossil primary OC (POCFF: 14 & PLUSMN; 6 %), biomass burning OC (OCbb: 13 & PLUSMN; 6 %) and cooking OC (OCck: 8 & PLUSMN; 5 %). Also, we established the dynamic variation of 13C 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 & PLUSMN; 4 %) when more non-fossil OC particles were transferred from the northern PRD.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据