| 西安市降雪中DOM荧光特性和来源分析 |
| |
| 引用本文： | 杨毅,韩丽媛,刘焕武,雷颖,李燚,徐会宁. 西安市降雪中DOM荧光特性和来源分析[J]. 环境科学, 2020, 41(2): 743-749. DOI: 10.13227/j.hjkx.201907073 |
| |
| 作者姓名： | 杨毅 韩丽媛 刘焕武 雷颖 李燚 徐会宁 |
| |
| 作者单位： | 西安建筑科技大学环境与市政工程学院,西安 710055;西安建筑科技大学陕西省环境工程重点实验室,西安 710055;西安建筑科技大学西北水资源与环境生态教育部重点实验室,西安 710055,西安建筑科技大学环境与市政工程学院,西安 710055,西安市环境监测站,西安 710018,西安建筑科技大学环境与市政工程学院,西安 710055,西安建筑科技大学环境与市政工程学院,西安 710055,西安建筑科技大学陕西省环境工程重点实验室,西安 710055;西安建筑科技大学西北水资源与环境生态教育部重点实验室,西安 710055 |
| |
| 基金项目： | 国家自然科学基金项目（21407119）；陕西省教育厅重点实验室科研计划项目（18JS055）；西安建筑科技大学预研基金项目（ZR18032） |
| |
| 摘 要： | 利用三维荧光光谱、平行因子分析模型和后向轨迹模型等,分析西安市降雪中溶解性有机物(DOM)的荧光特性和来源,研究结果可为大气有机污染物的化学组成和来源分析提供数据基础.结果表明,降雪DOM的DOC含量为0. 88～10. 92mg·L-1,主要含有类腐殖质、类富里酸、类色氨酸和类酪氨酸,它们荧光强度及其总和与DOC和UV254呈显著正相关(P <0. 01).降雪过程中DOM的荧光指数(FI)、生物源指数(BIX)和腐殖化指数(HIX)值分别为1. 50～1. 75、0. 87～1. 25和1. 11～1. 97,且FI与BIX和HIX分别呈正相关和负相关(P <0. 05).降雪期间气团传输轨迹包括:本地源、起始于新疆(途经甘肃、宁夏)的长距离传输、起始于内蒙古(途经宁夏)和山东(途经河南)的中距离传输,分别占总量的38. 78%、24. 04%、19. 87%和17. 31%.结果也表明,可利用代表类腐殖质、类富里酸、类色氨酸和类酪氨酸荧光峰的荧光强度与其总和表征降水中DOM的含量或相对含量,降雪中DOM兼具生物源和陆源,属于...
|
| 关 键 词： | 降雪 溶解性有机物 荧光特性 平行因子分析 后向轨迹模型 来源 |
| 收稿时间： | 2019-07-08 |
| 修稿时间： | 2019-09-29 |
Fluorescence Characteristics and Source Analysis of DOM in Snowfall of Xi'an |
| |
| YANG Yi,HAN Li-yuan,LIU Huan-wu,LEI Ying,LI Yi and XU Hui-ning. Fluorescence Characteristics and Source Analysis of DOM in Snowfall of Xi'an[J]. Chinese Journal of Environmental Science, 2020, 41(2): 743-749. DOI: 10.13227/j.hjkx.201907073 |
| |
| Authors: | YANG Yi HAN Li-yuan LIU Huan-wu LEI Ying LI Yi XU Hui-ning |
| |
| Affiliation: | School of Environmental and Municipal Engineering, Xi''an University of Architecture and Technology, Xi''an 710055, China;Shaanxi Key Laboratory of Environmental Engineering, Xi''an University of Architecture and Technology, Xi''an 710055, China;Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi''an University of Architecture and Technology, Xi''an 710055, China,School of Environmental and Municipal Engineering, Xi''an University of Architecture and Technology, Xi''an 710055, China,Xi''an Environmental Monitoring Station, Xi''an 710018, China,School of Environmental and Municipal Engineering, Xi''an University of Architecture and Technology, Xi''an 710055, China,School of Environmental and Municipal Engineering, Xi''an University of Architecture and Technology, Xi''an 710055, China and Shaanxi Key Laboratory of Environmental Engineering, Xi''an University of Architecture and Technology, Xi''an 710055, China;Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi''an University of Architecture and Technology, Xi''an 710055, China |
| |
| Abstract: | Fluorescence characteristics and sources of dissolved organic matter (DOM) in snowfall in Xi''an were studied by three-dimensional fluorescence spectroscopy, parallel factor analysis, and backward trajectory model, which provided a data basis for the analysis of the chemical composition and source of atmospheric organic pollutants. Results show that the DOC content of DOM was 0.88-10.92 mg·L-1. DOM mainly contained humus-like, fulvic acid-like, tryptophan-like, and tyrosine-like substances. The fluorescence intensity and the summed intensities of these substances exhibited significant positive correlations with the DOC and UV254 (P<0.01). The fluorescence index (FI), biological source index (BIX), and humic index (HIX) values of DOM during snowfall were 1.50-1.75, 0.87-1.25, and 1.11-1.97, respectively. FI was positively correlated with BIX and negatively correlated with HIX (P<0.05). During snowfall, the air mass transmission trajectories included the local transmission, long-distance transmission starting from Xinjiang (through Gansu and Ningxia), and medium-distance transmissions starting from Inner Mongolia (through Ningxia) and Shandong (via Henan), accounting for 38.78%, 24.04%, 19.87%, and 17.31% of the total, respectively. This indicates that the content or relative content of the DOM contained in the precipitation can be characterized by fluorescence intensities and their sums of the humic-like, fulvic acid-like, tryptophan-like, and tyrosine-like tyrosine. The DOM in snowfall had both biological and terrestrial characteristics, and belonged to a self-generated source with the newly produced organic matter or matter with stronger self-source characteristics. Local transmission had the most significant contribution to the source of snowfall DOM. |
| |
| Keywords: | snowfall dissolved organic matter fluorescence characteristics parallel factor analysis backward trajectory model source |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《环境科学》浏览原始摘要信息 |
|
点击此处可从《环境科学》下载全文 |
|
