文献类型： 外文期刊

第一作者： Shi, Chuan-qi

作者： Shi, Chuan-qi;Chen, Xi;Li, Yan;Wei, Dan;Li, Zi-wei

作者机构：

关键词： Three-dimensional fluorescence spectrum; Landscape water; Dissolved organic matter; Spectral index; Fluorescence Intensity

期刊名称：SPECTROSCOPY AND SPECTRAL ANALYSIS （ 影响因子：0.8； 五年影响因子：0.7 ）

ISSN： 1000-0593

年卷期： 2025 年 45 卷 3 期

页码：

收录情况： SCI

摘要： The overlying water is the interface between water and the atmosphere and its water quality is an important indicator for evaluating the environmental quality of park landscape water. This study collected landscape overlying water samples from sight parks in Harbin urban and applied the three-dimensional fluorescence spectroscopy parallel factor analysis method to detect the fluorescence spectral characteristics of dissolved organic matter (DOM), DOM's source and composition characteristics and the correlation between fluorescence spectral index, component fluorescence intensity, and physicochemical index were analyzed. This provides a reference basis for the environmental quality evaluation and pollution prevention of urban park landscape water. The study results showed that DOM's fluorescence index (FI) ranged from 1.71 to 1.98. with average value of 1. 185. Suggesting that the source of DOM has both exogenous and endogenous characteristics. The biological index (BI) ranged from 8.97 to 1.34. averaging 1.094 the freshness index (la) ranged from 0.91 to 1. 19. averaging 1.101. indicating strong characteristics of the recently endogenous composed of DOM. The humification index (HI) ranged from 0. 186 to 4. 126. veraging at 2. 143. indicating a low degree of humification. Five kinds of DOM fluorescent components identified in the water samples: fulvic-like acid substance (Ultraviolet fulvic-like acid component. Cl. visible fulvic-like acid component C2). Brotein-like substance (tryptophan-like component C3. tyrosine-like component C5), and humie-like acid component (C4). The relative concentration of humie-like substances (C1, C2, and C4) was higher than that of protein-like substances. There was a significant (p<0.01) positive correlation among the three kinds of humic-like substances, and all were significantly (p<0.01) Aegatively correlated with C5, However, the correlation between C3 and other fluorescent components was insignificant (p> 8.05). Various physicochemical indices' impact on FI was insignificant (p0.05). The value of pH and Bl. Ba (p<0.01) xhibited a significant positive correlation and a significant negative correlation with HI (p<0.05), respectively. The negative orrelation between DO and C3 and the positive correlation between DO and CS were significant (p<0.05). Humus-like Jubstances were significantly positively correlated with TOC, TP (p<0.01), and COD (p<0.05), while fulvic-like acid Jubstances were also significantly positively correlated with TN (p<0.05). Conversely, C5 negatively correlated with TOC and TP (p<0.01). Based on the principal component analysis results of the overlying water physicochemical indices DOM Luorescence spectral index and component fluorescence intensity, it can be concluded that compared to the fluorescence spectral Andex, the fluorescence intensity of humic-like substances and C5 can better distinguish different water samples and be used to evaluate the environmental quality of landscape water.

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