| Molecular characterization of nitrogen-containing organic compounds in fractionated atmospheric humic-like substances (HULIS) and its relationship with optical properties | |
Wu, Chenghao; Zhu, Bao ; Liang, Wenqing; Ruan, Ting; Jiang, Guibin
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| 2022-08-01 | |
| Source Publication | SCIENCE OF THE TOTAL ENVIRONMENT
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| ISSN | 0048-9697 |
| Volume | 832Issue:0Pages:155043 |
| Abstract | Diverse nitrogen-containing organics are important components of humic-like substances (HULIS) in the atmosphere. In this study, organic components in particulate matter (PM) samples representing multiple sources were separated by successive solvent fractionation, which were then analyzed by mass spectrometric and optical instruments. The CHON compounds were eluted and clustered into the Low-polar, Medium-polar, and High-polar fractions, and discrepancies of the polar-fractions were particularly reflected by molecular descriptors such as aromaticity, oxygen content and molecular weight. In addition, the results from the light-absorbing parameters (i.e., MAE(365) and SUVA(254)) underscored the importance of the Low-polar and High-polar fractions on optical absorption properties. The Low-polar fraction accounted for 40% of the cumulative SUVA(254) values, suggesting significant content of ultraviolet-absorbing organics. The High-polar fraction contributed 52% of the cumulative MAE(365) values, indicating abundant light absorption capacity and efficiency. Significant improvements were made on statistical analysis of multidimensional data by a combination of the molecular descriptors and optical parameters. Molecular structures, including condensed aromatic, lignin-like, and aliphatic compounds observed in distinct electrospray ionization modes, were found as main contributors to the light absorption capacity and the abundances of fluorophores in individual polar-fractions. Differential contributions of molecular characteristics on types and abundances of fluorophores were further found among the samples of multiple sources. Conclusions obtained from this successive solvent fractionation experiment could promote development of the pretreatment method for exploring the potential light-absorbing organics, which also provide insights into the emission sources of organics that are related to specific light absorption and fluorescence properties. |
| Department | 环境化学与生态毒理学国家重点实验室 ; 环境化学与生态毒理学国家重点实验室 |
| Keyword | LIGHT-ABSORPTION BROWN CARBON NITRATED PHENOLS CHEMICAL-CHARACTERIZATION BIOMASS MATERIALS RESIDENTIAL COAL AEROSOL PM2.5 URBAN COMBUSTION |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/47579 |
| Collection | 环境化学与生态毒理学国家重点实验室 |
| Corresponding Author | Ruan, Ting |
| Recommended Citation GB/T 7714 | Wu, Chenghao,Zhu, Bao,Liang, Wenqing,et al. Molecular characterization of nitrogen-containing organic compounds in fractionated atmospheric humic-like substances (HULIS) and its relationship with optical properties[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2022,832(0):155043. |
| APA | Wu, Chenghao,Zhu, Bao,Liang, Wenqing,Ruan, Ting,&Jiang, Guibin.(2022).Molecular characterization of nitrogen-containing organic compounds in fractionated atmospheric humic-like substances (HULIS) and its relationship with optical properties.SCIENCE OF THE TOTAL ENVIRONMENT,832(0),155043. |
| MLA | Wu, Chenghao,et al."Molecular characterization of nitrogen-containing organic compounds in fractionated atmospheric humic-like substances (HULIS) and its relationship with optical properties".SCIENCE OF THE TOTAL ENVIRONMENT 832.0(2022):155043. |
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| Molecular characteri（2174KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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