| Title: | "Triple Isotopes (delta(13)C, delta(2)H, and Delta(14)C) Compositions and Source Apportionment of Atmospheric Naphthalene: A Key Surrogate of Intermediate-Volatility Organic Compounds (IVOCs)" |
| Author(s): | Tang T; Cheng Z; Xu B; Zhang B; Zhu S; Cheng H; Li J; Chen Y; Zhang G; |
| Address: | "State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China. University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China. School of Resource and Environmental Science, Wuhan University, Wuhan 430079, People's Republic of China. Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, People's Republic of China" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "Naphthalene (NAP), as a surrogate of intermediate-volatility organic compounds (IVOCs), has been proposed to be an important precursor of secondary organic aerosol (SOA). However, the relative contribution of its emission sources is still not explicit. This study firstly conducted the source apportionment of atmospheric NAP using a triple-isotope (delta(13)C, delta(2)H, and Delta(14)C) technique combined with a Bayesian model in the Beijing-Tianjin-Hebei (BTH) region of China. At the urban sites, stable carbon (-27.7 +/- 0.7 per thousand, delta(13)C) and radiocarbon (-944.0 +/- 20.4 per thousand, Delta(14)C) isotope compositions of NAP did not exhibit significant seasonal variation, but the deuterium system showed a relatively more (2)H depleted signature in winter (-86.7 +/- 8.9 per thousand, delta(2)H) in comparison to that in summer (-56.4 +/- 3.9 per thousand, delta(2)H). Radiocarbon signatures indicated that 95.1 +/- 1.8% of NAP was emitted from fossil sources in these cities. The Bayesian model results indicated that the emission source compositions in the BTH urban sites had a similar pattern. The contribution of liquid fossil combustion was highest (46.7 +/- 2.6%), followed by coal high-temperature combustion (26.8 +/- 7.1%), coal low-temperature combustion (18.9 +/- 6.4%), and biomass burning (7.6 +/- 3.1%). At the suburban site, the contribution of coal low-temperature combustion could reach 70.1 +/- 6.4%. The triple-isotope based approach provides a top-down constraint on the sources of atmospheric NAP and could be further applied to other IVOCs in the ambient atmosphere" |
| Keywords: | Air Pollutants/*analysis Bayes Theorem Beijing China Cities Environmental Monitoring Isotopes Naphthalenes *Volatile Organic Compounds Volatilization; |
| Notes: | "MedlineTang, Tiangang Cheng, Zhineng Xu, Buqing Zhang, Bolong Zhu, Sanyuan Cheng, Hairong Li, Jun Chen, Yingjun Zhang, Gan eng Research Support, Non-U.S. Gov't 2020/04/08 Environ Sci Technol. 2020 May 5; 54(9):5409-5418. doi: 10.1021/acs.est.0c00075. Epub 2020 Apr 16" |
