Characterizing dissolved organic matter in Taihu Lake with PARAFAC and SOM method

Water Science and Technology

卷:85

W. Zhang¹  T. Li²  B. Dong² 

[1] Beijing General Municipal Engineering Design & Research Institute Co., Ltd., Beijing 100082, China;

[2] State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;

关键词: 3d-eems;    dissolved organic matter;    fluorescence;    parafac;    som model;   

DOI  :  10.2166/wst.2022.010

来源: DOAJ

【 摘 要 】

The three-dimensional fluorescence spectrum has a significantly greater amount of information than the single-stage scanning fluorescence spectrum. At the same time, the parallel factor (PARAFAC) analysis and neural network method can help explore the fluorescence characteristics further, thus could be used to analyse multiple sets of three-dimensional matrix data. In this study, the PARAFAC analysis and the self-organizing mapping (SOM) neural network method are firstly introduced comprehensively. They are then adopted to extract information of the three-dimensional fluorescence spectrum data set for fluorescence characteristics analysis of dissolved organic matter (DOM) in Taihu Lake water. Forty water samples with DOM species were taken from different seasons with the fluorescence information obtained through three-dimensional fluorescence spectrum analysis, PARAFAC analysis and SOM analysis. The PARAFAC analysis results indicated that the main fluorescence components of dissolved organic matter in Taihu Lake water were aromatic proteins, fulvic acids, and dissolved microorganisms. The SOM analysis results showed that the fluorescence characteristics of the dissolved organics in Taihu Lake varied seasonally. Therefore, the combined method of three-dimensional fluorescence spectrum analysis, PARAFAC and SOM analysis can provide important information for characterization of the fluorescence properties of dissolved organic matter in surface water bodies. HIGHLIGHTS PARAFAC and SOM map analysis can be used for 3D-EEMs characterization of DOM.;Fluorescence organics of DOM in Taihu Lake have three components with PARAFAC.;Fulvic acid and dissolved microbial secretions are the main fluorescence organics.;Fluorescent components of DOM in Taihu Lake vary seasonally with SOM map analysis.;

【 授权许可】

Unknown