Articles | Volume 21, issue 5
https://doi.org/10.5194/acp-21-3685-2021
https://doi.org/10.5194/acp-21-3685-2021
Measurement report
 | 
10 Mar 2021
Measurement report |  | 10 Mar 2021

Measurement report: PM2.5-bound nitrated aromatic compounds in Xi'an, Northwest China – seasonal variations and contributions to optical properties of brown carbon

Wei Yuan, Ru-Jin Huang, Lu Yang, Ting Wang, Jing Duan, Jie Guo, Haiyan Ni, Yang Chen, Qi Chen, Yongjie Li, Ulrike Dusek, Colin O'Dowd, and Thorsten Hoffmann

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Preprint under review for ACP
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Characterization of the light-absorbing properties, chromophore composition and sources of brown carbon aerosol in Xi'an, northwestern China
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Cited articles

Al-Naiema, I. M. and Stone, E. A.: Evaluation of anthropogenic secondary organic aerosol tracers from aromatic hydrocarbons, Atmos. Chem. Phys., 17, 2053–2065, https://doi.org/10.5194/acp-17-2053-2017, 2017. 
Andreozzi, R., Canterino, M., Caprio, V., Di Somma, I., and Sanchirico, R.: Salicylic acid nitration by means of nitric acid/acetic acid system: chemical and kinetic characterization, Org. Process. Res. Dev., 10, 1199–1204, 2006. 
Barsotti, F., Bartels-Rausch, T., De Laurentiis, E., Ammann, M., Brigante, M., Mailhot, G., Maurino, V., Minero, C., and Vione, D.: Photochemical formation of nitrite and nitrous acid (HONO) upon irradiation of nitrophenols in aqueous solution and in viscous secondary organic aerosol proxy, Environ. Sci. Technol., 51, 7486–7495, 2017. 
Canonaco, F., Crippa, M., Slowik, J. G., Baltensperger, U., and Prévôt, A. S. H.: SoFi, an IGOR-based interface for the efficient use of the generalized multilinear engine (ME-2) for the source apportionment: ME-2 application to aerosol mass spectrometer data, Atmos. Meas. Tech., 6, 3649–3661, https://doi.org/10.5194/amt-6-3649-2013, 2013. 
Cecinato, A., Di Palo, V., Pomata, D., Tomasi Sciano, M. C., and Possanzini, M.: Measurement of phase-distributed nitrophenols in Rome ambient air, Chemosphere, 59, 679–683, https://doi.org/10.1016/j.chemosphere.2004.10.045, 2005. 
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Short summary
We characterized the seasonal variations in nitrated aromatic compounds (NACs) in composition, sources, and their light absorption contribution to brown carbon (BrC) aerosol in Xi'an, Northwest China. Our results show that secondary formation and vehicular emission were dominant sources in summer (~80 %), and biomass burning and coal combustion were major sources in winter (~75 %), and they indicate that the composition and sources of NACs have a profound impact on the light absorption of BrC
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