| Measurement report: PM2:5-bound nitrated aromatic compounds in Xi'an, Northwest China - seasonal variations and contributions to optical properties of brown carbon | |
| Yuan, Wei1,6; Huang, Ru-Jin1,2; Yang, Lu1; Wang, Ting1,6; Duan, Jing1,6; Guo, Jie1; Ni, Haiyan1,7; Chen, Yang3; Chen, Qi4; Li, Yongjie5; Dusek, Ulrike7; O'Dowd, Colin8,9; Hoffmann, Thorsten10 | |
| 通讯作者 | Huang, Ru-Jin(rujin.huang@ieecas.cn) |
| 2021-03-10 | |
| 发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
 |
| ISSN | 1680-7316 |
| 卷号 | 21期号:5页码:3685-3697 |
| 摘要 | Nitrated aromatic compounds (NACs) are a group of key chromophores for brown carbon (light-absorbing organic carbon, i.e., BrC) aerosol, which affects radiative forcing. The chemical composition and sources of NACs and their contributions to BrC absorption, however, are still not well understood. In this study, PM2:5-bound NACs in Xi'an, Northwest China, were investigated for 112 daily PM2:5 filter samples from 2015 to 2016. Both the total concentrations and contributions from individual species of NACs show distinct seasonal variations. The seasonally averaged concentrations of NACs are 2.1 (spring), 1.1 (summer), 12.9 (fall), and 56 ng m(-3) (winter). Thereinto, 4-nitrophenol is the major NAC component in spring (58 %). The concentrations of 5-nitrosalicylic acid and 4-nitrophenol dominate in summer (70 %), and the concentrations of 4-nitrocatechol and 4-nitrophenol dominate in fall (58 %) and winter (55 %). The NAC species show different seasonal patterns in concentrations, indicating differences in emissions and formation pathways. Source apportionment results using positive matrix factorization (PMF) further show large seasonal differences in the sources of NACs. Specifically, in summer, NACs were highly influenced by secondary formation and vehicle emissions (similar to 80 %), while in winter, biomass burning and coal combustion contributed the most (similar to 75 %). Furthermore, the light absorption contributions of NACs to BrC are wavelength-dependent and vary greatly by season, with maximum contributions at similar to 330 nm in winter and fall and similar to 320 nm in summer and spring. The differences in the contribution to light absorption are associated with the higher mass fractions of 4-nitrocatechol ((lambda)max = 345 nm) and 4-nitrophenol ((lambda)max = 310 nm) in fall and winter, 4-nitrophenol in spring, and 5-nitrosalicylic acid ((lambda)max = 315 nm) and 4-nitrophenol in summer. The mean contributions of NACs to BrC light absorption at a wavelength of 365 nm in different seasons are 0.14% (spring), 0.09% (summer), 0.36% (fall), and 0.91% (winter), which are about 6-9 times higher than their mass fractional contributions of carbon in total organic carbon. Our results indicate that the composition and sources of NACs have profound impacts on the BrC light absorption. |
| DOI | 10.5194/acp-21-3685-2021 |
| 收录类别 | SCI ; SCI |
| 语种 | 英语 |
| 资助项目 | National Natural Science Foundation of China[41877408] ; National Natural Science Foundation of China[41925015] ; National Natural Science Foundation of China[91644219] ; National Natural Science Foundation of China[41675120] ; Chinese Academy of Sciences[ZDBS-LY-DQC001] ; Chinese Academy of Sciences[XDB40030202] ; National Key Research and Development Program of China[2017YFC0212701] ; Cross Innovative Team fund from the State Key Laboratory of Loess and Quaternary Geology[SKLLQGTD1801] ; Multi-Year Research grant from the University of Macau[MYRG2017-00044-FST] ; Multi-Year Research grant from the University of Macau[MYRG2018-00006-FST] |
| WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
| 项目资助者 | National Natural Science Foundation of China ; Chinese Academy of Sciences ; National Key Research and Development Program of China ; Cross Innovative Team fund from the State Key Laboratory of Loess and Quaternary Geology ; Multi-Year Research grant from the University of Macau |
| WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
| WOS记录号 | WOS:000627702700001 |
| 出版者 | COPERNICUS GESELLSCHAFT MBH |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ieecas.cn/handle/361006/16065 |
| 专题 | 粉尘与环境研究室 第四纪科学与全球变化卓越创新中心 |
| 通讯作者 | Huang, Ru-Jin |
| 作者单位 | 1.Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, Inst Earth Environm, Key Lab Aerosol Chem & Phys,State Key Lab Loess &, Xian 710061, Peoples R China 2.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China 3.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 4.Peking Univ, Coll Environm Sci & Engn, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100871, Peoples R China 5.Univ Macau, Fac Sci & Technol, Dept Civil & Environm Engn, Taipa 999078, Macau, Peoples R China 6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 7.Univ Groningen, Ctr Isotope Res CIO, Energy & Sustainabil Res Inst Groningen ESRIG, NL-9747 AG Groningen, Netherlands 8.Natl Univ Ireland Galway, Sch Phys, Univ Rd, Galway H91C F50, Ireland 9.Natl Univ Ireland Galway, Ctr Climate & Air Pollut Studies, Ryan Inst, Univ Rd, Galway H91C F50, Ireland 10.Johannes Gutenberg Univ Mainz, Inst Inorgan & Analyt Chem, Duesbergweg 10-14, D-55128 Mainz, Germany |
| 推荐引用方式 GB/T 7714 | Yuan, Wei,Huang, Ru-Jin,Yang, Lu,et al. Measurement report: PM2:5-bound nitrated aromatic compounds in Xi'an, Northwest China - seasonal variations and contributions to optical properties of brown carbon[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2021,21(5):3685-3697. |
| APA | Yuan, Wei.,Huang, Ru-Jin.,Yang, Lu.,Wang, Ting.,Duan, Jing.,...&Hoffmann, Thorsten.(2021).Measurement report: PM2:5-bound nitrated aromatic compounds in Xi'an, Northwest China - seasonal variations and contributions to optical properties of brown carbon.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(5),3685-3697. |
| MLA | Yuan, Wei,et al."Measurement report: PM2:5-bound nitrated aromatic compounds in Xi'an, Northwest China - seasonal variations and contributions to optical properties of brown carbon".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.5(2021):3685-3697. |
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