Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-20-4593-2020 |
The evolutionary behavior of chromophoric brown carbon during ozone aging of fine particles from biomass burning | |
Fan, Xingjun1; 39;an2 | |
2020-04-21 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2020 |
卷号 | 20期号:8页码:4593-4605 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Biomass burning (BB) emits large amounts of brown carbon (BrC); however, the evolutionary behavior of BrC in BB emissions (BB BrC) resulting from complex atmospheric processes is poorly understood. In this study, the transformation of contents and the chromophoric characteristics of BrC in smoke particles emitted by the burning of rice straw (RS), corn straw (CS), and pinewood (PW) under O-3 aging are investigated. The O-3 aging induced the reduction of light absorption and fluorescence for the BB BrC, suggesting the decomposition of chromophores and fluorophores. These changes were accompanied by a decrease in aromaticity, average molecular weight, and the light absorption capacity for the chromophores, as well as an increase in humification for the fluorophores. The excitation emission matrix combined with a parallel factor analysis revealed that protein-like components (C3) were predominantly decomposed by O-3 aging, while the relative distribution of a humiclike component with highly oxygenated chromophores (C4) gradually increased. In general, the humic-like substances (C1+C2+C4) were transformed to be the most abundant fluorophores for all the BB BrC samples, which accounted for 84 %-87% of the total fluorophores in final O-3-aged BB BrC. Two-dimensional correlation spectroscopy (2D-COS) was performed on the synchronous fluorescence, which suggested that the RS and CS BrC exhibits the same susceptible fluorophores changes upon O-3 aging. It showed that O3 firstly reacted with protein-like fractions (263-289 nm) and then with fulvic-like fractions (333-340 nm). In comparison, the changing sequence of susceptible fluorophores in the PW BrC to O3 was in the order of fulvic-like fluorophores with shorter wavelengths (309 nm), protein-like fluorophores (276 nm), and fulvic-like fluorophores with longer wavelengths (358 nm). The 2D-FTIR-COS (2D-COS combined with FTIR) analysis showed conjugated C=O and aromatic C=C and C=O groups were the most susceptible functional groups to O-3 aging for all BB BrC. Moreover, it also revealed a consistent sequential change, which is in the order of aromatic OH; conjugated C=O groups and aromatic C=O; aromatic COO; and finally lignin-derived C-C, C-H, and C-O groups. Our results provide new insights into the evolutionary behavior of the chromophoric and fluorescent properties of BB BrC during O-3 aging, which are of great significance for better understanding the heterogeneous oxidation pathways of BB-derived BrC in the atmospheric environment. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000529310000002 |
WOS关键词 | DISSOLVED ORGANIC-MATTER ; HUMIC-LIKE SUBSTANCES ; LIGHT-ABSORPTION PROPERTIES ; FENTON-LIKE OXIDATION ; EXCITATION-EMISSION FLUORESCENCE ; SMALL AROMATIC-ACIDS ; 2-DIMENSIONAL CORRELATION ; BLACK CARBON ; PHYSICOCHEMICAL CHARACTERISTICS ; HETEROGENEOUS REACTIONS |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/248958 |
专题 | 地球科学 |
作者单位 | 1.Anhui Sci & Technol Univ, Coll Resource & Environm, Fengyang 233100, Peoples R China; 2.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China; 3.Anhui Prov Key Lab Biochar & Cropland Pollut Prev, Bengbu 233400, Peoples R China; 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Fan, Xingjun,39;an. The evolutionary behavior of chromophoric brown carbon during ozone aging of fine particles from biomass burning[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2020,20(8):4593-4605. |
APA | Fan, Xingjun,&39;an.(2020).The evolutionary behavior of chromophoric brown carbon during ozone aging of fine particles from biomass burning.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(8),4593-4605. |
MLA | Fan, Xingjun,et al."The evolutionary behavior of chromophoric brown carbon during ozone aging of fine particles from biomass burning".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.8(2020):4593-4605. |
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